Merge "Remove legacy idmap binary"
diff --git a/cmds/idlcli/Android.bp b/cmds/idlcli/Android.bp
index 40b8dc7..bb92fd3 100644
--- a/cmds/idlcli/Android.bp
+++ b/cmds/idlcli/Android.bp
@@ -20,9 +20,11 @@
         "android.hardware.vibrator@1.2",
         "android.hardware.vibrator@1.3",
         "libbase",
+        "libbinder",
         "libhidlbase",
         "liblog",
         "libutils",
+        "vintf-vibrator-cpp",
     ],
     cflags: [
         "-DLOG_TAG=\"idlcli\"",
@@ -34,6 +36,7 @@
     defaults: ["idlcli-defaults"],
     srcs: [
         "CommandVibrator.cpp",
+        "vibrator/CommandGetCapabilities.cpp",
         "vibrator/CommandOff.cpp",
         "vibrator/CommandOn.cpp",
         "vibrator/CommandPerform.cpp",
diff --git a/cmds/idlcli/vibrator.h b/cmds/idlcli/vibrator.h
index bcb207b..2f11923 100644
--- a/cmds/idlcli/vibrator.h
+++ b/cmds/idlcli/vibrator.h
@@ -18,6 +18,8 @@
 #define FRAMEWORK_NATIVE_CMDS_IDLCLI_VIBRATOR_H_
 
 #include <android/hardware/vibrator/1.3/IVibrator.h>
+#include <android/hardware/vibrator/IVibrator.h>
+#include <binder/IServiceManager.h>
 
 #include "utils.h"
 
@@ -31,9 +33,25 @@
 
 // Creates a Return<R> with STATUS::EX_NULL_POINTER.
 template <class R>
-inline Return<R> NullptrStatus() {
+inline R NullptrStatus() {
     using ::android::hardware::Status;
-    return Return<R>{Status::fromExceptionCode(Status::EX_NULL_POINTER)};
+    return Status::fromExceptionCode(Status::EX_NULL_POINTER);
+}
+
+template <>
+inline binder::Status NullptrStatus() {
+    using binder::Status;
+    return Status::fromExceptionCode(Status::EX_NULL_POINTER);
+}
+
+template <typename I>
+inline sp<I> getService() {
+    return I::getService();
+}
+
+template <>
+inline sp<hardware::vibrator::IVibrator> getService() {
+    return waitForVintfService<hardware::vibrator::IVibrator>();
 }
 
 template <typename I>
@@ -42,12 +60,12 @@
     static std::unique_ptr<HalWrapper> Create() {
         // Assume that if getService returns a nullptr, HAL is not available on the
         // device.
-        auto hal = I::getService();
+        auto hal = getService<I>();
         return hal ? std::unique_ptr<HalWrapper>(new HalWrapper(std::move(hal))) : nullptr;
     }
 
     template <class R, class... Args0, class... Args1>
-    Return<R> call(Return<R> (I::*fn)(Args0...), Args1&&... args1) {
+    R call(R (I::*fn)(Args0...), Args1&&... args1) {
         return (*mHal.*fn)(std::forward<Args1>(args1)...);
     }
 
@@ -65,7 +83,7 @@
 }
 
 template <class R, class I, class... Args0, class... Args1>
-Return<R> halCall(Return<R> (I::*fn)(Args0...), Args1&&... args1) {
+R halCall(R (I::*fn)(Args0...), Args1&&... args1) {
     auto hal = getHal<I>();
     return hal ? hal->call(fn, std::forward<Args1>(args1)...) : NullptrStatus<R>();
 }
@@ -77,6 +95,7 @@
 namespace V1_1 = ::android::hardware::vibrator::V1_1;
 namespace V1_2 = ::android::hardware::vibrator::V1_2;
 namespace V1_3 = ::android::hardware::vibrator::V1_3;
+namespace aidl = ::android::hardware::vibrator;
 
 } // namespace vibrator
 } // namespace idlcli
diff --git a/cmds/idlcli/vibrator/CommandGetCapabilities.cpp b/cmds/idlcli/vibrator/CommandGetCapabilities.cpp
new file mode 100644
index 0000000..30d8587
--- /dev/null
+++ b/cmds/idlcli/vibrator/CommandGetCapabilities.cpp
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "utils.h"
+#include "vibrator.h"
+
+namespace android {
+namespace idlcli {
+
+class CommandVibrator;
+
+namespace vibrator {
+
+class CommandGetCapabilities : public Command {
+    std::string getDescription() const override { return "Retrieves vibrator capabilities."; }
+
+    std::string getUsageSummary() const override { return ""; }
+
+    UsageDetails getUsageDetails() const override {
+        UsageDetails details{};
+        return details;
+    }
+
+    Status doArgs(Args &args) override {
+        if (!args.empty()) {
+            std::cerr << "Unexpected Arguments!" << std::endl;
+            return USAGE;
+        }
+        return OK;
+    }
+
+    Status doMain(Args && /*args*/) override {
+        std::string statusStr;
+        int32_t cap;
+        Status ret;
+
+        if (auto hal = getHal<aidl::IVibrator>()) {
+            auto status = hal->call(&aidl::IVibrator::getCapabilities, &cap);
+            statusStr = status.toString8();
+            ret = status.isOk() ? OK : ERROR;
+        } else {
+            return UNAVAILABLE;
+        }
+
+        std::cout << "Status: " << statusStr << std::endl;
+        std::cout << "Capabilities: " << std::bitset<32>(cap) << std::endl;
+
+        return ret;
+    }
+};
+
+static const auto Command =
+        CommandRegistry<CommandVibrator>::Register<CommandGetCapabilities>("getCapabilities");
+
+} // namespace vibrator
+} // namespace idlcli
+} // namespace android
diff --git a/cmds/idlcli/vibrator/CommandOff.cpp b/cmds/idlcli/vibrator/CommandOff.cpp
index a674f01..53fada0 100644
--- a/cmds/idlcli/vibrator/CommandOff.cpp
+++ b/cmds/idlcli/vibrator/CommandOff.cpp
@@ -42,15 +42,24 @@
     }
 
     Status doMain(Args && /*args*/) override {
-        auto ret = halCall(&V1_0::IVibrator::off);
+        std::string statusStr;
+        Status ret;
 
-        if (!ret.isOk()) {
+        if (auto hal = getHal<aidl::IVibrator>()) {
+            auto status = hal->call(&aidl::IVibrator::off);
+            statusStr = status.toString8();
+            ret = status.isOk() ? OK : ERROR;
+        } else if (auto hal = getHal<V1_0::IVibrator>()) {
+            auto status = hal->call(&V1_0::IVibrator::off);
+            statusStr = toString(status);
+            ret = status.isOk() && status == V1_0::Status::OK ? OK : ERROR;
+        } else {
             return UNAVAILABLE;
         }
 
-        std::cout << "Status: " << toString(ret) << std::endl;
+        std::cout << "Status: " << statusStr << std::endl;
 
-        return ret == V1_0::Status::OK ? OK : ERROR;
+        return ret;
     }
 };
 
diff --git a/cmds/idlcli/vibrator/CommandOn.cpp b/cmds/idlcli/vibrator/CommandOn.cpp
index 2164b7d..ccb3c19 100644
--- a/cmds/idlcli/vibrator/CommandOn.cpp
+++ b/cmds/idlcli/vibrator/CommandOn.cpp
@@ -50,15 +50,24 @@
     }
 
     Status doMain(Args && /*args*/) override {
-        auto ret = halCall(&V1_0::IVibrator::on, mDuration);
+        std::string statusStr;
+        Status ret;
 
-        if (!ret.isOk()) {
+        if (auto hal = getHal<aidl::IVibrator>()) {
+            auto status = hal->call(&aidl::IVibrator::on, mDuration, nullptr);
+            statusStr = status.toString8();
+            ret = status.isOk() ? OK : ERROR;
+        } else if (auto hal = getHal<V1_0::IVibrator>()) {
+            auto status = hal->call(&V1_0::IVibrator::on, mDuration);
+            statusStr = toString(status);
+            ret = status.isOk() && status == V1_0::Status::OK ? OK : ERROR;
+        } else {
             return UNAVAILABLE;
         }
 
-        std::cout << "Status: " << toString(ret) << std::endl;
+        std::cout << "Status: " << statusStr << std::endl;
 
-        return ret == V1_0::Status::OK ? OK : ERROR;
+        return ret;
     }
 
     uint32_t mDuration;
diff --git a/cmds/idlcli/vibrator/CommandPerform.cpp b/cmds/idlcli/vibrator/CommandPerform.cpp
index 688cbd8..58d4e0a 100644
--- a/cmds/idlcli/vibrator/CommandPerform.cpp
+++ b/cmds/idlcli/vibrator/CommandPerform.cpp
@@ -23,6 +23,34 @@
 
 namespace vibrator {
 
+/*
+ * The following static asserts are only relevant here because the argument
+ * parser uses a single implementation for determining the string names.
+ */
+static_assert(static_cast<uint8_t>(V1_0::EffectStrength::LIGHT) ==
+              static_cast<uint8_t>(aidl::EffectStrength::LIGHT));
+static_assert(static_cast<uint8_t>(V1_0::EffectStrength::MEDIUM) ==
+              static_cast<uint8_t>(aidl::EffectStrength::MEDIUM));
+static_assert(static_cast<uint8_t>(V1_0::EffectStrength::STRONG) ==
+              static_cast<uint8_t>(aidl::EffectStrength::STRONG));
+static_assert(static_cast<uint8_t>(V1_3::Effect::CLICK) ==
+              static_cast<uint8_t>(aidl::Effect::CLICK));
+static_assert(static_cast<uint8_t>(V1_3::Effect::DOUBLE_CLICK) ==
+              static_cast<uint8_t>(aidl::Effect::DOUBLE_CLICK));
+static_assert(static_cast<uint8_t>(V1_3::Effect::TICK) == static_cast<uint8_t>(aidl::Effect::TICK));
+static_assert(static_cast<uint8_t>(V1_3::Effect::THUD) == static_cast<uint8_t>(aidl::Effect::THUD));
+static_assert(static_cast<uint8_t>(V1_3::Effect::POP) == static_cast<uint8_t>(aidl::Effect::POP));
+static_assert(static_cast<uint8_t>(V1_3::Effect::HEAVY_CLICK) ==
+              static_cast<uint8_t>(aidl::Effect::HEAVY_CLICK));
+static_assert(static_cast<uint8_t>(V1_3::Effect::RINGTONE_1) ==
+              static_cast<uint8_t>(aidl::Effect::RINGTONE_1));
+static_assert(static_cast<uint8_t>(V1_3::Effect::RINGTONE_2) ==
+              static_cast<uint8_t>(aidl::Effect::RINGTONE_2));
+static_assert(static_cast<uint8_t>(V1_3::Effect::RINGTONE_15) ==
+              static_cast<uint8_t>(aidl::Effect::RINGTONE_15));
+static_assert(static_cast<uint8_t>(V1_3::Effect::TEXTURE_TICK) ==
+              static_cast<uint8_t>(aidl::Effect::TEXTURE_TICK));
+
 using V1_0::EffectStrength;
 using V1_3::Effect;
 
@@ -62,38 +90,50 @@
     }
 
     Status doMain(Args && /*args*/) override {
-        Return<void> ret;
-        V1_0::Status status;
+        std::string statusStr;
         uint32_t lengthMs;
-        auto callback = [&status, &lengthMs](V1_0::Status retStatus, uint32_t retLengthMs) {
-            status = retStatus;
-            lengthMs = retLengthMs;
-        };
+        Status ret;
 
-        if (auto hal = getHal<V1_3::IVibrator>()) {
-            ret = hal->call(&V1_3::IVibrator::perform_1_3, static_cast<V1_3::Effect>(mEffect),
-                            mStrength, callback);
-        } else if (auto hal = getHal<V1_2::IVibrator>()) {
-            ret = hal->call(&V1_2::IVibrator::perform_1_2, static_cast<V1_2::Effect>(mEffect),
-                            mStrength, callback);
-        } else if (auto hal = getHal<V1_1::IVibrator>()) {
-            ret = hal->call(&V1_1::IVibrator::perform_1_1, static_cast<V1_1::Effect_1_1>(mEffect),
-                            mStrength, callback);
-        } else if (auto hal = getHal<V1_0::IVibrator>()) {
-            ret = hal->call(&V1_0::IVibrator::perform, static_cast<V1_0::Effect>(mEffect),
-                            mStrength, callback);
+        if (auto hal = getHal<aidl::IVibrator>()) {
+            int32_t aidlLengthMs;
+            auto status =
+                    hal->call(&aidl::IVibrator::perform, static_cast<aidl::Effect>(mEffect),
+                              static_cast<aidl::EffectStrength>(mStrength), nullptr, &aidlLengthMs);
+            statusStr = status.toString8();
+            lengthMs = static_cast<uint32_t>(aidlLengthMs);
+            ret = status.isOk() ? OK : ERROR;
         } else {
-            ret = NullptrStatus<void>();
+            Return<void> hidlRet;
+            V1_0::Status status;
+            auto callback = [&status, &lengthMs](V1_0::Status retStatus, uint32_t retLengthMs) {
+                status = retStatus;
+                lengthMs = retLengthMs;
+            };
+
+            if (auto hal = getHal<V1_3::IVibrator>()) {
+                hidlRet = hal->call(&V1_3::IVibrator::perform_1_3,
+                                    static_cast<V1_3::Effect>(mEffect), mStrength, callback);
+            } else if (auto hal = getHal<V1_2::IVibrator>()) {
+                hidlRet = hal->call(&V1_2::IVibrator::perform_1_2,
+                                    static_cast<V1_2::Effect>(mEffect), mStrength, callback);
+            } else if (auto hal = getHal<V1_1::IVibrator>()) {
+                hidlRet = hal->call(&V1_1::IVibrator::perform_1_1,
+                                    static_cast<V1_1::Effect_1_1>(mEffect), mStrength, callback);
+            } else if (auto hal = getHal<V1_0::IVibrator>()) {
+                hidlRet = hal->call(&V1_0::IVibrator::perform, static_cast<V1_0::Effect>(mEffect),
+                                    mStrength, callback);
+            } else {
+                return UNAVAILABLE;
+            }
+
+            statusStr = toString(status);
+            ret = hidlRet.isOk() && status == V1_0::Status::OK ? OK : ERROR;
         }
 
-        if (!ret.isOk()) {
-            return UNAVAILABLE;
-        }
-
-        std::cout << "Status: " << toString(status) << std::endl;
+        std::cout << "Status: " << statusStr << std::endl;
         std::cout << "Length: " << lengthMs << std::endl;
 
-        return status == V1_0::Status::OK ? OK : ERROR;
+        return ret;
     }
 
     Effect mEffect;
diff --git a/cmds/idlcli/vibrator/CommandSetAmplitude.cpp b/cmds/idlcli/vibrator/CommandSetAmplitude.cpp
index 38a1dc2..6e2261f 100644
--- a/cmds/idlcli/vibrator/CommandSetAmplitude.cpp
+++ b/cmds/idlcli/vibrator/CommandSetAmplitude.cpp
@@ -50,15 +50,24 @@
     }
 
     Status doMain(Args && /*args*/) override {
-        auto ret = halCall(&V1_0::IVibrator::setAmplitude, mAmplitude);
+        std::string statusStr;
+        Status ret;
 
-        if (!ret.isOk()) {
+        if (auto hal = getHal<aidl::IVibrator>()) {
+            auto status = hal->call(&aidl::IVibrator::setAmplitude, mAmplitude);
+            statusStr = status.toString8();
+            ret = status.isOk() ? OK : ERROR;
+        } else if (auto hal = getHal<V1_0::IVibrator>()) {
+            auto status = hal->call(&V1_0::IVibrator::setAmplitude, mAmplitude);
+            statusStr = toString(status);
+            ret = status.isOk() && status == V1_0::Status::OK ? OK : ERROR;
+        } else {
             return UNAVAILABLE;
         }
 
-        std::cout << "Status: " << toString(ret) << std::endl;
+        std::cout << "Status: " << statusStr << std::endl;
 
-        return ret == V1_0::Status::OK ? OK : ERROR;
+        return ret;
     }
 
     uint8_t mAmplitude;
diff --git a/cmds/idlcli/vibrator/CommandSetExternalControl.cpp b/cmds/idlcli/vibrator/CommandSetExternalControl.cpp
index 5fb1fac..5bc827e 100644
--- a/cmds/idlcli/vibrator/CommandSetExternalControl.cpp
+++ b/cmds/idlcli/vibrator/CommandSetExternalControl.cpp
@@ -48,15 +48,24 @@
     }
 
     Status doMain(Args && /*args*/) override {
-        auto ret = halCall(&V1_3::IVibrator::setExternalControl, mEnable);
+        std::string statusStr;
+        Status ret;
 
-        if (!ret.isOk()) {
+        if (auto hal = getHal<aidl::IVibrator>()) {
+            auto status = hal->call(&aidl::IVibrator::setExternalControl, mEnable);
+            statusStr = status.toString8();
+            ret = status.isOk() ? OK : ERROR;
+        } else if (auto hal = getHal<V1_3::IVibrator>()) {
+            auto status = hal->call(&V1_3::IVibrator::setExternalControl, mEnable);
+            statusStr = toString(status);
+            ret = status.isOk() && status == V1_0::Status::OK ? OK : ERROR;
+        } else {
             return UNAVAILABLE;
         }
 
-        std::cout << "Status: " << toString(ret) << std::endl;
+        std::cout << "Status: " << statusStr << std::endl;
 
-        return ret == V1_0::Status::OK ? OK : ERROR;
+        return ret;
     }
 
     bool mEnable;
diff --git a/cmds/installd/dexopt.cpp b/cmds/installd/dexopt.cpp
index 768d900..f95e445 100644
--- a/cmds/installd/dexopt.cpp
+++ b/cmds/installd/dexopt.cpp
@@ -339,6 +339,10 @@
                 ? "dalvik.vm.dex2oat-threads"
                 : "dalvik.vm.boot-dex2oat-threads";
         std::string dex2oat_threads_arg = MapPropertyToArg(threads_property, "-j%s");
+        const char* cpu_set_property = post_bootcomplete
+                ? "dalvik.vm.dex2oat-cpu-set"
+                : "dalvik.vm.boot-dex2oat-cpu-set";
+        std::string dex2oat_cpu_set_arg = MapPropertyToArg(cpu_set_property, "--cpu-set=%s");
 
         std::string bootclasspath;
         char* dex2oat_bootclasspath = getenv("DEX2OATBOOTCLASSPATH");
@@ -518,6 +522,7 @@
         AddArg(image_block_size_arg);
         AddArg(dex2oat_compiler_filter_arg);
         AddArg(dex2oat_threads_arg);
+        AddArg(dex2oat_cpu_set_arg);
         AddArg(dex2oat_swap_fd);
         AddArg(dex2oat_image_fd);
 
@@ -708,12 +713,13 @@
     }
 }
 
-static constexpr int PROFMAN_BIN_RETURN_CODE_COMPILE = 0;
-static constexpr int PROFMAN_BIN_RETURN_CODE_SKIP_COMPILATION = 1;
-static constexpr int PROFMAN_BIN_RETURN_CODE_BAD_PROFILES = 2;
-static constexpr int PROFMAN_BIN_RETURN_CODE_ERROR_IO = 3;
-static constexpr int PROFMAN_BIN_RETURN_CODE_ERROR_LOCKING = 4;
-static constexpr int PROFMAN_BIN_RETURN_CODE_SUCCESS = 5;
+static constexpr int PROFMAN_BIN_RETURN_CODE_SUCCESS = 0;
+static constexpr int PROFMAN_BIN_RETURN_CODE_COMPILE = 1;
+static constexpr int PROFMAN_BIN_RETURN_CODE_SKIP_COMPILATION = 2;
+static constexpr int PROFMAN_BIN_RETURN_CODE_BAD_PROFILES = 3;
+static constexpr int PROFMAN_BIN_RETURN_CODE_ERROR_IO = 4;
+static constexpr int PROFMAN_BIN_RETURN_CODE_ERROR_LOCKING = 5;
+static constexpr int PROFMAN_BIN_RETURN_CODE_ERROR_DIFFERENT_VERSIONS = 6;
 
 class RunProfman : public ExecVHelper {
   public:
@@ -889,6 +895,11 @@
                 should_clear_current_profiles = false;
                 should_clear_reference_profile = false;
                 break;
+            case PROFMAN_BIN_RETURN_CODE_ERROR_DIFFERENT_VERSIONS:
+                need_to_compile = false;
+                should_clear_current_profiles = true;
+                should_clear_reference_profile = true;
+                break;
            default:
                 // Unknown return code or error. Unlink profiles.
                 LOG(WARNING) << "Unexpected error code while processing profiles for location "
diff --git a/cmds/installd/migrate_legacy_obb_data.sh b/cmds/installd/migrate_legacy_obb_data.sh
index 0e6d7b9..7399681 100644
--- a/cmds/installd/migrate_legacy_obb_data.sh
+++ b/cmds/installd/migrate_legacy_obb_data.sh
@@ -15,17 +15,17 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-rm -rf /data/media/Android/obb/test_probe
-mkdir -p /data/media/Android/obb/
-touch /data/media/Android/obb/test_probe
+rm -rf /data/media/0/Android/obb/test_probe
+mkdir -p /data/media/0/Android/obb/
+touch /data/media/0/Android/obb/test_probe
 if ! test -f /data/media/0/Android/obb/test_probe ; then
   log -p i -t migrate_legacy_obb_data "No support for 'unshared_obb'. Not migrating"
-  rm -rf /data/media/Android/obb/test_probe
+  rm -rf /data/media/0/Android/obb/test_probe
   exit 0
 fi
 
 # Delete the test file, and remove the obb folder if it is empty
-rm -rf /data/media/Android/obb/test_probe
+rm -rf /data/media/0/Android/obb/test_probe
 rmdir /data/media/obb
 
 if ! test -d /data/media/obb ; then
diff --git a/cmds/installd/otapreopt.cpp b/cmds/installd/otapreopt.cpp
index db36ce3..eefbe4f 100644
--- a/cmds/installd/otapreopt.cpp
+++ b/cmds/installd/otapreopt.cpp
@@ -480,6 +480,10 @@
                 "-j",
                 false,
                 cmd);
+        AddCompilerOptionFromSystemProperty("dalvik.vm.image-dex2oat-cpu-set",
+                "--cpu-set=",
+                false,
+                cmd);
         AddCompilerOptionFromSystemProperty(
                 StringPrintf("dalvik.vm.isa.%s.variant", isa).c_str(),
                 "--instruction-set-variant=",
diff --git a/cmds/servicemanager/ServiceManager.cpp b/cmds/servicemanager/ServiceManager.cpp
index 861401c..141171b 100644
--- a/cmds/servicemanager/ServiceManager.cpp
+++ b/cmds/servicemanager/ServiceManager.cpp
@@ -68,7 +68,15 @@
 }
 #endif  // !VENDORSERVICEMANAGER
 
-ServiceManager::ServiceManager(std::unique_ptr<Access>&& access) : mAccess(std::move(access)) {}
+ServiceManager::ServiceManager(std::unique_ptr<Access>&& access) : mAccess(std::move(access)) {
+#ifndef VENDORSERVICEMANAGER
+    // can process these at any times, don't want to delay first VINTF client
+    std::thread([] {
+        vintf::VintfObject::GetDeviceHalManifest();
+        vintf::VintfObject::GetFrameworkHalManifest();
+    }).detach();
+#endif  // !VENDORSERVICEMANAGER
+}
 ServiceManager::~ServiceManager() {
     // this should only happen in tests
 
@@ -306,7 +314,7 @@
     if (listeners.empty()) {
         *it = mNameToCallback.erase(*it);
     } else {
-        it++;
+        (*it)++;
     }
 }
 
diff --git a/libs/binder/ProcessState.cpp b/libs/binder/ProcessState.cpp
index 3f47f3b..37c0d77 100644
--- a/libs/binder/ProcessState.cpp
+++ b/libs/binder/ProcessState.cpp
@@ -385,6 +385,12 @@
     , mThreadPoolSeq(1)
     , mCallRestriction(CallRestriction::NONE)
 {
+
+// TODO(b/139016109): enforce in build system
+#if defined(__ANDROID_APEX__) && !defined(__ANDROID_APEX_COM_ANDROID_VNDK_CURRENT__)
+    LOG_ALWAYS_FATAL("Cannot use libbinder in APEX (only system.img libbinder) since it is not stable.");
+#endif
+
     if (mDriverFD >= 0) {
         // mmap the binder, providing a chunk of virtual address space to receive transactions.
         mVMStart = mmap(nullptr, BINDER_VM_SIZE, PROT_READ, MAP_PRIVATE | MAP_NORESERVE, mDriverFD, 0);
diff --git a/libs/binder/Status.cpp b/libs/binder/Status.cpp
index 0ad99ce..674f065 100644
--- a/libs/binder/Status.cpp
+++ b/libs/binder/Status.cpp
@@ -232,9 +232,10 @@
         ret.append("No error");
     } else {
         ret.appendFormat("Status(%d, %s): '", mException, exceptionToString(mException).c_str());
-        if (mException == EX_SERVICE_SPECIFIC ||
-            mException == EX_TRANSACTION_FAILED) {
+        if (mException == EX_SERVICE_SPECIFIC) {
             ret.appendFormat("%d: ", mErrorCode);
+        } else if (mException == EX_TRANSACTION_FAILED) {
+            ret.appendFormat("%s: ", statusToString(mErrorCode).c_str());
         }
         ret.append(String8(mMessage));
         ret.append("'");
diff --git a/libs/binder/aidl/android/os/IServiceManager.aidl b/libs/binder/aidl/android/os/IServiceManager.aidl
index 8c7ebba..b965881 100644
--- a/libs/binder/aidl/android/os/IServiceManager.aidl
+++ b/libs/binder/aidl/android/os/IServiceManager.aidl
@@ -58,7 +58,7 @@
      * Returns null if the service does not exist.
      */
     @UnsupportedAppUsage
-    IBinder getService(@utf8InCpp String name);
+    @nullable IBinder getService(@utf8InCpp String name);
 
     /**
      * Retrieve an existing service called @a name from the service
@@ -66,7 +66,7 @@
      * exist.
      */
     @UnsupportedAppUsage
-    IBinder checkService(@utf8InCpp String name);
+    @nullable IBinder checkService(@utf8InCpp String name);
 
     /**
      * Place a new @a service called @a name into the service
diff --git a/libs/binder/ndk/include_ndk/android/binder_parcel_utils.h b/libs/binder/ndk/include_ndk/android/binder_parcel_utils.h
index f3bc31b..7871667 100644
--- a/libs/binder/ndk/include_ndk/android/binder_parcel_utils.h
+++ b/libs/binder/ndk/include_ndk/android/binder_parcel_utils.h
@@ -441,6 +441,42 @@
 }
 
 /**
+ * Writes a ScopedFileDescriptor object inside a std::vector<ScopedFileDescriptor> at index 'index'
+ * to 'parcel'.
+ */
+template <>
+inline binder_status_t AParcel_writeStdVectorParcelableElement<ScopedFileDescriptor>(
+        AParcel* parcel, const void* vectorData, size_t index) {
+    const std::vector<ScopedFileDescriptor>* vector =
+            static_cast<const std::vector<ScopedFileDescriptor>*>(vectorData);
+    int writeFd = vector->at(index).get();
+    if (writeFd < 0) {
+        return STATUS_UNEXPECTED_NULL;
+    }
+    return AParcel_writeParcelFileDescriptor(parcel, writeFd);
+}
+
+/**
+ * Reads a ScopedFileDescriptor object inside a std::vector<ScopedFileDescriptor> at index 'index'
+ * from 'parcel'.
+ */
+template <>
+inline binder_status_t AParcel_readStdVectorParcelableElement<ScopedFileDescriptor>(
+        const AParcel* parcel, void* vectorData, size_t index) {
+    std::vector<ScopedFileDescriptor>* vector =
+            static_cast<std::vector<ScopedFileDescriptor>*>(vectorData);
+    int readFd;
+    binder_status_t status = AParcel_readParcelFileDescriptor(parcel, &readFd);
+    if (status == STATUS_OK) {
+        if (readFd < 0) {
+            return STATUS_UNEXPECTED_NULL;
+        }
+        vector->at(index).set(readFd);
+    }
+    return status;
+}
+
+/**
  * Convenience API for writing a std::vector<P>
  */
 template <typename P>
diff --git a/libs/binder/tests/binderLibTest.cpp b/libs/binder/tests/binderLibTest.cpp
index db4a36b..94ab9f0 100644
--- a/libs/binder/tests/binderLibTest.cpp
+++ b/libs/binder/tests/binderLibTest.cpp
@@ -1034,9 +1034,9 @@
 
     binder_buffer_object obj {
         .hdr = { .type = BINDER_TYPE_PTR },
+        .flags = 0,
         .buffer = reinterpret_cast<binder_uintptr_t>((void*)&buf),
         .length = 4,
-        .flags = 0,
     };
     data.setDataCapacity(1024);
     // Write a bogus object at offset 0 to get an entry in the offset table
diff --git a/libs/cputimeinstate/cputimeinstate.cpp b/libs/cputimeinstate/cputimeinstate.cpp
index 45fea85..4ee9f55 100644
--- a/libs/cputimeinstate/cputimeinstate.cpp
+++ b/libs/cputimeinstate/cputimeinstate.cpp
@@ -397,7 +397,7 @@
         if (deleteMapEntry(gTisMapFd, &key) && errno != ENOENT) return false;
     }
 
-    concurrent_val_t czeros = {.policy = {0}, .active = {0}};
+    concurrent_val_t czeros = { .active = {0}, .policy = {0}, };
     std::vector<concurrent_val_t> cvals(gNCpus, czeros);
     for (key.bucket = 0; key.bucket <= (gNCpus - 1) / CPUS_PER_ENTRY; ++key.bucket) {
         if (writeToMapEntry(gConcurrentMapFd, &key, cvals.data(), BPF_EXIST) && errno != ENOENT)
diff --git a/libs/dumputils/dump_utils.cpp b/libs/dumputils/dump_utils.cpp
index 250f902..56b94c1 100644
--- a/libs/dumputils/dump_utils.cpp
+++ b/libs/dumputils/dump_utils.cpp
@@ -62,6 +62,9 @@
         "android.hardware.sensors@1.0::ISensors",
         "android.hardware.thermal@2.0::IThermal",
         "android.hardware.vr@1.0::IVr",
+        "android.hardware.automotive.audiocontrol@1.0::IAudioControl",
+        "android.hardware.automotive.vehicle@2.0::IVehicle",
+        "android.hardware.automotive.evs@1.0::IEvsCamera",
         NULL,
 };
 
diff --git a/libs/nativewindow/Android.bp b/libs/nativewindow/Android.bp
index 27ab482..55400c7 100644
--- a/libs/nativewindow/Android.bp
+++ b/libs/nativewindow/Android.bp
@@ -85,6 +85,11 @@
     export_header_lib_headers: [
         "libnativebase_headers",
     ],
+
+    stubs: {
+        symbol_file: "libnativewindow.map.txt",
+        versions: ["29"],
+    },
 }
 
 llndk_library {
diff --git a/libs/nativewindow/libnativewindow.map.txt b/libs/nativewindow/libnativewindow.map.txt
index daf1dcc..f59e8f0 100644
--- a/libs/nativewindow/libnativewindow.map.txt
+++ b/libs/nativewindow/libnativewindow.map.txt
@@ -2,9 +2,9 @@
   global:
     AHardwareBuffer_acquire;
     AHardwareBuffer_allocate;
-    AHardwareBuffer_createFromHandle; # llndk
+    AHardwareBuffer_createFromHandle; # llndk # apex
     AHardwareBuffer_describe;
-    AHardwareBuffer_getNativeHandle; # llndk
+    AHardwareBuffer_getNativeHandle; # llndk # apex
     AHardwareBuffer_isSupported; # introduced=29
     AHardwareBuffer_lock;
     AHardwareBuffer_lockAndGetInfo; # introduced=29
diff --git a/libs/nativewindow/tests/AHardwareBufferTest.cpp b/libs/nativewindow/tests/AHardwareBufferTest.cpp
index cc2731d..71b1f9f 100644
--- a/libs/nativewindow/tests/AHardwareBufferTest.cpp
+++ b/libs/nativewindow/tests/AHardwareBufferTest.cpp
@@ -20,6 +20,7 @@
 #include <android/hardware_buffer.h>
 #include <private/android/AHardwareBufferHelpers.h>
 #include <android/hardware/graphics/common/1.0/types.h>
+#include <vndk/hardware_buffer.h>
 
 #include <gtest/gtest.h>
 
@@ -100,9 +101,33 @@
             (uint64_t)BufferUsage::CPU_WRITE_RARELY,
             AHARDWAREBUFFER_USAGE_CPU_READ_RARELY | AHARDWAREBUFFER_USAGE_CPU_WRITE_RARELY));
 
-EXPECT_TRUE(TestUsageConversion(
+    EXPECT_TRUE(TestUsageConversion(
         (uint64_t)BufferUsage::GPU_RENDER_TARGET | (uint64_t)BufferUsage::GPU_TEXTURE |
-            1ull << 29 | 1ull << 57,
+        1ull << 29 | 1ull << 57,
         AHARDWAREBUFFER_USAGE_GPU_COLOR_OUTPUT | AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE |
         AHARDWAREBUFFER_USAGE_VENDOR_1 | AHARDWAREBUFFER_USAGE_VENDOR_13));
 }
+
+TEST(AHardwareBufferTest, GetCreateHandleTest) {
+    AHardwareBuffer_Desc desc{
+            .width = 64,
+            .height = 1,
+            .layers = 1,
+            .format = AHARDWAREBUFFER_FORMAT_BLOB,
+            .usage = AHARDWAREBUFFER_USAGE_CPU_READ_OFTEN | AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN,
+            .stride = 64,
+    };
+
+    AHardwareBuffer* buffer = nullptr;
+    EXPECT_EQ(0, AHardwareBuffer_allocate(&desc, &buffer));
+    const native_handle_t* handle = AHardwareBuffer_getNativeHandle(buffer);
+    EXPECT_NE(nullptr, handle);
+
+    AHardwareBuffer* otherBuffer = nullptr;
+    EXPECT_EQ(0, AHardwareBuffer_createFromHandle(
+        &desc, handle, AHARDWAREBUFFER_CREATE_FROM_HANDLE_METHOD_CLONE, &otherBuffer));
+    EXPECT_NE(nullptr, otherBuffer);
+
+    AHardwareBuffer_release(buffer);
+    AHardwareBuffer_release(otherBuffer);
+}
diff --git a/services/inputflinger/InputManager.cpp b/services/inputflinger/InputManager.cpp
index 1043390..e7640dd 100644
--- a/services/inputflinger/InputManager.cpp
+++ b/services/inputflinger/InputManager.cpp
@@ -46,6 +46,7 @@
 }
 
 void InputManager::initialize() {
+    mReaderThread = new InputReaderThread(mReader);
     mDispatcherThread = new InputDispatcherThread(mDispatcher);
 }
 
@@ -56,9 +57,9 @@
         return result;
     }
 
-    result = mReader->start();
+    result = mReaderThread->run("InputReader", PRIORITY_URGENT_DISPLAY);
     if (result) {
-        ALOGE("Could not start InputReader due to error %d.", result);
+        ALOGE("Could not start InputReader thread due to error %d.", result);
 
         mDispatcherThread->requestExit();
         return result;
@@ -68,9 +69,9 @@
 }
 
 status_t InputManager::stop() {
-    status_t result = mReader->stop();
+    status_t result = mReaderThread->requestExitAndWait();
     if (result) {
-        ALOGW("Could not stop InputReader due to error %d.", result);
+        ALOGW("Could not stop InputReader thread due to error %d.", result);
     }
 
     result = mDispatcherThread->requestExitAndWait();
diff --git a/services/inputflinger/InputManager.h b/services/inputflinger/InputManager.h
index 2a7ed0f..40f66d8 100644
--- a/services/inputflinger/InputManager.h
+++ b/services/inputflinger/InputManager.h
@@ -43,15 +43,15 @@
 /*
  * The input manager is the core of the system event processing.
  *
- * The input manager has two components.
+ * The input manager uses two threads.
  *
- * 1. The InputReader class starts a thread that reads and preprocesses raw input events, applies
- *    policy, and posts messages to a queue managed by the InputDispatcherThread.
+ * 1. The InputReaderThread (called "InputReader") reads and preprocesses raw input events,
+ *    applies policy, and posts messages to a queue managed by the DispatcherThread.
  * 2. The InputDispatcherThread (called "InputDispatcher") thread waits for new events on the
  *    queue and asynchronously dispatches them to applications.
  *
- * By design, the InputReader class and InputDispatcherThread class do not share any
- * internal state.  Moreover, all communication is done one way from the InputReader
+ * By design, the InputReaderThread class and InputDispatcherThread class do not share any
+ * internal state.  Moreover, all communication is done one way from the InputReaderThread
  * into the InputDispatcherThread and never the reverse.  Both classes may interact with the
  * InputDispatchPolicy, however.
  *
@@ -102,6 +102,7 @@
 
 private:
     sp<InputReaderInterface> mReader;
+    sp<InputReaderThread> mReaderThread;
 
     sp<InputClassifierInterface> mClassifier;
 
diff --git a/services/inputflinger/InputReaderBase.cpp b/services/inputflinger/InputReaderBase.cpp
index 2d6f2c1..0422d83 100644
--- a/services/inputflinger/InputReaderBase.cpp
+++ b/services/inputflinger/InputReaderBase.cpp
@@ -33,6 +33,20 @@
 
 namespace android {
 
+// --- InputReaderThread ---
+
+InputReaderThread::InputReaderThread(const sp<InputReaderInterface>& reader) :
+        Thread(/*canCallJava*/ true), mReader(reader) {
+}
+
+InputReaderThread::~InputReaderThread() {
+}
+
+bool InputReaderThread::threadLoop() {
+    mReader->loopOnce();
+    return true;
+}
+
 // --- InputReaderConfiguration ---
 
 std::string InputReaderConfiguration::changesToString(uint32_t changes) {
diff --git a/services/inputflinger/include/InputReaderBase.h b/services/inputflinger/include/InputReaderBase.h
index 56c0a73..5d576b9 100644
--- a/services/inputflinger/include/InputReaderBase.h
+++ b/services/inputflinger/include/InputReaderBase.h
@@ -19,12 +19,12 @@
 
 #include "PointerControllerInterface.h"
 
-#include <input/DisplayViewport.h>
 #include <input/Input.h>
 #include <input/InputDevice.h>
+#include <input/DisplayViewport.h>
 #include <input/VelocityControl.h>
 #include <input/VelocityTracker.h>
-#include <utils/Errors.h>
+#include <utils/Thread.h>
 #include <utils/RefBase.h>
 
 #include <stddef.h>
@@ -44,16 +44,7 @@
 
 namespace android {
 
-// --- InputReaderInterface ---
-
-/* The interface for the InputReader shared library.
- *
- * Manages one or more threads that process raw input events and sends cooked event data to an
- * input listener.
- *
- * The implementation must guarantee thread safety for this interface. However, since the input
- * listener is NOT thread safe, all calls to the listener must happen from the same thread.
- */
+/* Processes raw input events and sends cooked event data to an input listener. */
 class InputReaderInterface : public virtual RefBase {
 protected:
     InputReaderInterface() { }
@@ -65,17 +56,18 @@
      * This method may be called on any thread (usually by the input manager). */
     virtual void dump(std::string& dump) = 0;
 
-    /* Called by the heartbeat to ensures that the reader has not deadlocked. */
+    /* Called by the heatbeat to ensures that the reader has not deadlocked. */
     virtual void monitor() = 0;
 
     /* Returns true if the input device is enabled. */
     virtual bool isInputDeviceEnabled(int32_t deviceId) = 0;
 
-    /* Makes the reader start processing events from the kernel. */
-    virtual status_t start() = 0;
-
-    /* Makes the reader stop processing any more events. */
-    virtual status_t stop() = 0;
+    /* Runs a single iteration of the processing loop.
+     * Nominally reads and processes one incoming message from the EventHub.
+     *
+     * This method should be called on the input reader thread.
+     */
+    virtual void loopOnce() = 0;
 
     /* Gets information about all input devices.
      *
@@ -112,7 +104,17 @@
     virtual bool canDispatchToDisplay(int32_t deviceId, int32_t displayId) = 0;
 };
 
-// --- InputReaderConfiguration ---
+/* Reads raw events from the event hub and processes them, endlessly. */
+class InputReaderThread : public Thread {
+public:
+    explicit InputReaderThread(const sp<InputReaderInterface>& reader);
+    virtual ~InputReaderThread();
+
+private:
+    sp<InputReaderInterface> mReader;
+
+    virtual bool threadLoop();
+};
 
 /*
  * Input reader configuration.
@@ -283,8 +285,6 @@
     std::vector<DisplayViewport> mDisplays;
 };
 
-// --- TouchAffineTransformation ---
-
 struct TouchAffineTransformation {
     float x_scale;
     float x_ymix;
@@ -307,8 +307,6 @@
     void applyTo(float& x, float& y) const;
 };
 
-// --- InputReaderPolicyInterface ---
-
 /*
  * Input reader policy interface.
  *
@@ -318,8 +316,8 @@
  * The actual implementation is partially supported by callbacks into the DVM
  * via JNI.  This interface is also mocked in the unit tests.
  *
- * These methods will NOT re-enter the input reader interface, so they may be called from
- * any method in the input reader interface.
+ * These methods must NOT re-enter the input reader since they may be called while
+ * holding the input reader lock.
  */
 class InputReaderPolicyInterface : public virtual RefBase {
 protected:
diff --git a/services/inputflinger/reader/InputReader.cpp b/services/inputflinger/reader/InputReader.cpp
index 05f0db1..1c5adc3 100644
--- a/services/inputflinger/reader/InputReader.cpp
+++ b/services/inputflinger/reader/InputReader.cpp
@@ -38,38 +38,16 @@
 #include <unistd.h>
 
 #include <log/log.h>
-#include <utils/Errors.h>
 
 #include <android-base/stringprintf.h>
 #include <input/Keyboard.h>
 #include <input/VirtualKeyMap.h>
-#include <utils/Thread.h>
+
 
 using android::base::StringPrintf;
 
 namespace android {
 
-// --- InputReader::InputReaderThread ---
-
-/* Thread that reads raw events from the event hub and processes them, endlessly. */
-class InputReader::InputReaderThread : public Thread {
-public:
-    explicit InputReaderThread(InputReader* reader)
-          : Thread(/* canCallJava */ true), mReader(reader) {}
-
-    ~InputReaderThread() {}
-
-private:
-    InputReader* mReader;
-
-    bool threadLoop() override {
-        mReader->loopOnce();
-        return true;
-    }
-};
-
-// --- InputReader ---
-
 InputReader::InputReader(std::shared_ptr<EventHubInterface> eventHub,
                          const sp<InputReaderPolicyInterface>& policy,
                          const sp<InputListenerInterface>& listener)
@@ -83,7 +61,6 @@
         mNextTimeout(LLONG_MAX),
         mConfigurationChangesToRefresh(0) {
     mQueuedListener = new QueuedInputListener(listener);
-    mThread = new InputReaderThread(this);
 
     { // acquire lock
         AutoMutex _l(mLock);
@@ -99,28 +76,6 @@
     }
 }
 
-status_t InputReader::start() {
-    if (mThread->isRunning()) {
-        return ALREADY_EXISTS;
-    }
-    return mThread->run("InputReader", PRIORITY_URGENT_DISPLAY);
-}
-
-status_t InputReader::stop() {
-    if (!mThread->isRunning()) {
-        return OK;
-    }
-    if (gettid() == mThread->getTid()) {
-        ALOGE("InputReader can only be stopped from outside of the InputReaderThread!");
-        return INVALID_OPERATION;
-    }
-    // Directly calling requestExitAndWait() causes the thread to not exit
-    // if mEventHub is waiting for a long timeout.
-    mThread->requestExit();
-    mEventHub->wake();
-    return mThread->requestExitAndWait();
-}
-
 void InputReader::loopOnce() {
     int32_t oldGeneration;
     int32_t timeoutMillis;
diff --git a/services/inputflinger/reader/include/InputReader.h b/services/inputflinger/reader/include/InputReader.h
index 0a4e808..557eb3b 100644
--- a/services/inputflinger/reader/include/InputReader.h
+++ b/services/inputflinger/reader/include/InputReader.h
@@ -38,12 +38,12 @@
  * that it sends to the input listener.  Some functions of the input reader, such as early
  * event filtering in low power states, are controlled by a separate policy object.
  *
- * The InputReader owns a collection of InputMappers. InputReader starts its own thread, where
- * most of the work happens, but the InputReader can receive queries from other system
+ * The InputReader owns a collection of InputMappers.  Most of the work it does happens
+ * on the input reader thread but the InputReader can receive queries from other system
  * components running on arbitrary threads.  To keep things manageable, the InputReader
  * uses a single Mutex to guard its state.  The Mutex may be held while calling into the
  * EventHub or the InputReaderPolicy but it is never held while calling into the
- * InputListener. All calls to InputListener must happen from InputReader's thread.
+ * InputListener.
  */
 class InputReader : public InputReaderInterface {
 public:
@@ -55,8 +55,7 @@
     virtual void dump(std::string& dump) override;
     virtual void monitor() override;
 
-    virtual status_t start() override;
-    virtual status_t stop() override;
+    virtual void loopOnce() override;
 
     virtual void getInputDevices(std::vector<InputDeviceInfo>& outInputDevices) override;
 
@@ -112,9 +111,6 @@
     friend class ContextImpl;
 
 private:
-    class InputReaderThread;
-    sp<InputReaderThread> mThread;
-
     Mutex mLock;
 
     Condition mReaderIsAliveCondition;
@@ -137,10 +133,6 @@
 
     std::unordered_map<int32_t /*deviceId*/, InputDevice*> mDevices;
 
-    // With each iteration of the loop, InputReader reads and processes one incoming message from
-    // the EventHub.
-    void loopOnce();
-
     // low-level input event decoding and device management
     void processEventsLocked(const RawEvent* rawEvents, size_t count);
 
diff --git a/services/inputflinger/tests/InputDispatcher_test.cpp b/services/inputflinger/tests/InputDispatcher_test.cpp
index b706a74..2a29e0d 100644
--- a/services/inputflinger/tests/InputDispatcher_test.cpp
+++ b/services/inputflinger/tests/InputDispatcher_test.cpp
@@ -50,43 +50,35 @@
 
 public:
     FakeInputDispatcherPolicy() {
-        mInputEventFiltered = false;
-        mTime = -1;
-        mAction = -1;
-        mDisplayId = -1;
         mOnPointerDownToken.clear();
     }
 
-    void assertFilterInputEventWasCalledWithExpectedArgs(const NotifyMotionArgs* args) {
-        ASSERT_TRUE(mInputEventFiltered)
-                << "Expected filterInputEvent() to have been called.";
+    void assertFilterInputEventWasCalled(const NotifyKeyArgs& args) {
+        ASSERT_NE(nullptr, mFilteredEvent) << "Expected filterInputEvent() to have been called.";
+        ASSERT_EQ(mFilteredEvent->getType(), AINPUT_EVENT_TYPE_KEY);
 
-        ASSERT_EQ(mTime, args->eventTime)
-                << "Expected time of filtered event was not matched";
-        ASSERT_EQ(mAction, args->action)
-                << "Expected action of filtered event was not matched";
-        ASSERT_EQ(mDisplayId, args->displayId)
-                << "Expected displayId of filtered event was not matched";
+        const KeyEvent& keyEvent = static_cast<const KeyEvent&>(*mFilteredEvent);
+        ASSERT_EQ(keyEvent.getEventTime(), args.eventTime);
+        ASSERT_EQ(keyEvent.getAction(), args.action);
+        ASSERT_EQ(keyEvent.getDisplayId(), args.displayId);
 
         reset();
     }
 
-    void assertFilterInputEventWasCalledWithExpectedArgs(const NotifyKeyArgs* args) {
-        ASSERT_TRUE(mInputEventFiltered)
-                << "Expected filterInputEvent() to have been called.";
+    void assertFilterInputEventWasCalled(const NotifyMotionArgs& args) {
+        ASSERT_NE(nullptr, mFilteredEvent) << "Expected filterInputEvent() to have been called.";
+        ASSERT_EQ(mFilteredEvent->getType(), AINPUT_EVENT_TYPE_MOTION);
 
-        ASSERT_EQ(mTime, args->eventTime)
-                << "Expected time of filtered event was not matched";
-        ASSERT_EQ(mAction, args->action)
-                << "Expected action of filtered event was not matched";
-        ASSERT_EQ(mDisplayId, args->displayId)
-                << "Expected displayId of filtered event was not matched";
+        const MotionEvent& motionEvent = static_cast<const MotionEvent&>(*mFilteredEvent);
+        ASSERT_EQ(motionEvent.getEventTime(), args.eventTime);
+        ASSERT_EQ(motionEvent.getAction(), args.action);
+        ASSERT_EQ(motionEvent.getDisplayId(), args.displayId);
 
         reset();
     }
 
     void assertFilterInputEventWasNotCalled() {
-        ASSERT_FALSE(mInputEventFiltered)
+        ASSERT_EQ(nullptr, mFilteredEvent)
                 << "Expected filterInputEvent() to not have been called.";
     }
 
@@ -97,10 +89,7 @@
     }
 
 private:
-    bool mInputEventFiltered;
-    nsecs_t mTime;
-    int32_t mAction;
-    int32_t mDisplayId;
+    std::unique_ptr<InputEvent> mFilteredEvent;
     sp<IBinder> mOnPointerDownToken;
 
     virtual void notifyConfigurationChanged(nsecs_t) {
@@ -122,26 +111,20 @@
         *outConfig = mConfig;
     }
 
-    virtual bool filterInputEvent(const InputEvent* inputEvent, uint32_t policyFlags) {
+    virtual bool filterInputEvent(const InputEvent* inputEvent, uint32_t policyFlags) override {
         switch (inputEvent->getType()) {
             case AINPUT_EVENT_TYPE_KEY: {
                 const KeyEvent* keyEvent = static_cast<const KeyEvent*>(inputEvent);
-                mTime = keyEvent->getEventTime();
-                mAction = keyEvent->getAction();
-                mDisplayId = keyEvent->getDisplayId();
+                mFilteredEvent = std::make_unique<KeyEvent>(*keyEvent);
                 break;
             }
 
             case AINPUT_EVENT_TYPE_MOTION: {
                 const MotionEvent* motionEvent = static_cast<const MotionEvent*>(inputEvent);
-                mTime = motionEvent->getEventTime();
-                mAction = motionEvent->getAction();
-                mDisplayId = motionEvent->getDisplayId();
+                mFilteredEvent = std::make_unique<MotionEvent>(*motionEvent);
                 break;
             }
         }
-
-        mInputEventFiltered = true;
         return true;
     }
 
@@ -176,10 +159,7 @@
     }
 
     void reset() {
-        mInputEventFiltered = false;
-        mTime = -1;
-        mAction = -1;
-        mDisplayId = -1;
+        mFilteredEvent = nullptr;
         mOnPointerDownToken.clear();
     }
 };
@@ -385,8 +365,8 @@
 
 class FakeInputReceiver {
 public:
-    void consumeEvent(int32_t expectedEventType, int32_t expectedDisplayId,
-            int32_t expectedFlags = 0) {
+    void consumeEvent(int32_t expectedEventType, int32_t expectedAction, int32_t expectedDisplayId,
+                      int32_t expectedFlags) {
         uint32_t consumeSeq;
         InputEvent* event;
         status_t status = mConsumer->consume(&mEventFactory, false /*consumeBatches*/, -1,
@@ -399,33 +379,41 @@
         ASSERT_EQ(expectedEventType, event->getType())
                 << mName.c_str() << ": event type should match.";
 
-        ASSERT_EQ(expectedDisplayId, event->getDisplayId())
-                << mName.c_str() << ": event displayId should be the same as expected.";
+        EXPECT_EQ(expectedDisplayId, event->getDisplayId());
 
-        int32_t flags;
         switch (expectedEventType) {
             case AINPUT_EVENT_TYPE_KEY: {
-                KeyEvent* typedEvent = static_cast<KeyEvent*>(event);
-                flags = typedEvent->getFlags();
+                const KeyEvent& keyEvent = static_cast<const KeyEvent&>(*event);
+                EXPECT_EQ(expectedAction, keyEvent.getAction());
+                EXPECT_EQ(expectedFlags, keyEvent.getFlags());
                 break;
             }
             case AINPUT_EVENT_TYPE_MOTION: {
-                MotionEvent* typedEvent = static_cast<MotionEvent*>(event);
-                flags = typedEvent->getFlags();
+                const MotionEvent& motionEvent = static_cast<const MotionEvent&>(*event);
+                EXPECT_EQ(expectedAction, motionEvent.getAction());
+                EXPECT_EQ(expectedFlags, motionEvent.getFlags());
                 break;
             }
             default: {
                 FAIL() << mName.c_str() << ": invalid event type: " << expectedEventType;
             }
         }
-        ASSERT_EQ(expectedFlags, flags)
-                << mName.c_str() << ": event flags should be the same as expected.";
 
         status = mConsumer->sendFinishedSignal(consumeSeq, handled());
         ASSERT_EQ(OK, status)
                 << mName.c_str() << ": consumer sendFinishedSignal should return OK.";
     }
 
+    void consumeKeyDown(int32_t expectedDisplayId, int32_t expectedFlags = 0) {
+        consumeEvent(AINPUT_EVENT_TYPE_KEY, AKEY_EVENT_ACTION_DOWN, expectedDisplayId,
+                     expectedFlags);
+    }
+
+    void consumeMotionDown(int32_t expectedDisplayId, int32_t expectedFlags = 0) {
+        consumeEvent(AINPUT_EVENT_TYPE_MOTION, AMOTION_EVENT_ACTION_DOWN, expectedDisplayId,
+                     expectedFlags);
+    }
+
     void assertNoEvents() {
         uint32_t consumeSeq;
         InputEvent* event;
@@ -631,7 +619,7 @@
             << "Inject motion event should return INPUT_EVENT_INJECTION_SUCCEEDED";
 
     // Window should receive motion event.
-    window->consumeEvent(AINPUT_EVENT_TYPE_MOTION, ADISPLAY_ID_DEFAULT);
+    window->consumeMotionDown(ADISPLAY_ID_DEFAULT);
 }
 
 // The foreground window should receive the first touch down event.
@@ -652,7 +640,7 @@
             << "Inject motion event should return INPUT_EVENT_INJECTION_SUCCEEDED";
 
     // Top window should receive the touch down event. Second window should not receive anything.
-    windowTop->consumeEvent(AINPUT_EVENT_TYPE_MOTION, ADISPLAY_ID_DEFAULT);
+    windowTop->consumeMotionDown(ADISPLAY_ID_DEFAULT);
     windowSecond->assertNoEvents();
 }
 
@@ -678,7 +666,7 @@
 
     // Focused window should receive event.
     windowTop->assertNoEvents();
-    windowSecond->consumeEvent(AINPUT_EVENT_TYPE_KEY, ADISPLAY_ID_NONE);
+    windowSecond->consumeKeyDown(ADISPLAY_ID_NONE);
 }
 
 TEST_F(InputDispatcherTest, SetInputWindow_FocusPriority) {
@@ -703,7 +691,7 @@
             << "Inject key event should return INPUT_EVENT_INJECTION_SUCCEEDED";
 
     // Top focused window should receive event.
-    windowTop->consumeEvent(AINPUT_EVENT_TYPE_KEY, ADISPLAY_ID_NONE);
+    windowTop->consumeKeyDown(ADISPLAY_ID_NONE);
     windowSecond->assertNoEvents();
 }
 
@@ -733,7 +721,7 @@
 
     // Top window is invalid, so it should not receive any input event.
     windowTop->assertNoEvents();
-    windowSecond->consumeEvent(AINPUT_EVENT_TYPE_KEY, ADISPLAY_ID_NONE);
+    windowSecond->consumeKeyDown(ADISPLAY_ID_NONE);
 }
 
 TEST_F(InputDispatcherTest, DispatchMouseEventsUnderCursor) {
@@ -758,7 +746,7 @@
     ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED,
               injectMotionEvent(mDispatcher, AMOTION_EVENT_ACTION_DOWN, AINPUT_SOURCE_MOUSE,
                                 ADISPLAY_ID_DEFAULT, 610, 400, 599, 400));
-    windowLeft->consumeEvent(AINPUT_EVENT_TYPE_MOTION, ADISPLAY_ID_DEFAULT);
+    windowLeft->consumeMotionDown(ADISPLAY_ID_DEFAULT);
     windowRight->assertNoEvents();
 }
 
@@ -814,7 +802,7 @@
     ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED, injectMotionDown(mDispatcher,
             AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT))
             << "Inject motion event should return INPUT_EVENT_INJECTION_SUCCEEDED";
-    windowInPrimary->consumeEvent(AINPUT_EVENT_TYPE_MOTION, ADISPLAY_ID_DEFAULT);
+    windowInPrimary->consumeMotionDown(ADISPLAY_ID_DEFAULT);
     windowInSecondary->assertNoEvents();
 
     // Test touch down on second display.
@@ -822,29 +810,29 @@
             AINPUT_SOURCE_TOUCHSCREEN, SECOND_DISPLAY_ID))
             << "Inject motion event should return INPUT_EVENT_INJECTION_SUCCEEDED";
     windowInPrimary->assertNoEvents();
-    windowInSecondary->consumeEvent(AINPUT_EVENT_TYPE_MOTION, SECOND_DISPLAY_ID);
+    windowInSecondary->consumeMotionDown(SECOND_DISPLAY_ID);
 }
 
 TEST_F(InputDispatcherFocusOnTwoDisplaysTest, SetInputWindow_MultiDisplayFocus) {
     // Test inject a key down with display id specified.
     ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED, injectKeyDown(mDispatcher, ADISPLAY_ID_DEFAULT))
             << "Inject key event should return INPUT_EVENT_INJECTION_SUCCEEDED";
-    windowInPrimary->consumeEvent(AINPUT_EVENT_TYPE_KEY, ADISPLAY_ID_DEFAULT);
+    windowInPrimary->consumeKeyDown(ADISPLAY_ID_DEFAULT);
     windowInSecondary->assertNoEvents();
 
     // Test inject a key down without display id specified.
     ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED, injectKeyDown(mDispatcher))
             << "Inject key event should return INPUT_EVENT_INJECTION_SUCCEEDED";
     windowInPrimary->assertNoEvents();
-    windowInSecondary->consumeEvent(AINPUT_EVENT_TYPE_KEY, ADISPLAY_ID_NONE);
+    windowInSecondary->consumeKeyDown(ADISPLAY_ID_NONE);
 
     // Remove secondary display.
     std::vector<sp<InputWindowHandle>> noWindows;
     mDispatcher->setInputWindows(noWindows, SECOND_DISPLAY_ID);
 
     // Expect old focus should receive a cancel event.
-    windowInSecondary->consumeEvent(AINPUT_EVENT_TYPE_KEY, ADISPLAY_ID_NONE,
-            AKEY_EVENT_FLAG_CANCELED);
+    windowInSecondary->consumeEvent(AINPUT_EVENT_TYPE_KEY, AKEY_EVENT_ACTION_UP, ADISPLAY_ID_NONE,
+                                    AKEY_EVENT_FLAG_CANCELED);
 
     // Test inject a key down, should timeout because of no target window.
     ASSERT_EQ(INPUT_EVENT_INJECTION_TIMED_OUT, injectKeyDown(mDispatcher))
@@ -873,8 +861,8 @@
     ASSERT_EQ(INPUT_EVENT_INJECTION_SUCCEEDED, injectMotionDown(mDispatcher,
             AINPUT_SOURCE_TOUCHSCREEN, ADISPLAY_ID_DEFAULT))
             << "Inject motion event should return INPUT_EVENT_INJECTION_SUCCEEDED";
-    windowInPrimary->consumeEvent(AINPUT_EVENT_TYPE_MOTION, ADISPLAY_ID_DEFAULT);
-    monitorInPrimary->consumeEvent(AINPUT_EVENT_TYPE_MOTION, ADISPLAY_ID_DEFAULT);
+    windowInPrimary->consumeMotionDown(ADISPLAY_ID_DEFAULT);
+    monitorInPrimary->consumeMotionDown(ADISPLAY_ID_DEFAULT);
     windowInSecondary->assertNoEvents();
     monitorInSecondary->assertNoEvents();
 
@@ -884,8 +872,8 @@
             << "Inject motion event should return INPUT_EVENT_INJECTION_SUCCEEDED";
     windowInPrimary->assertNoEvents();
     monitorInPrimary->assertNoEvents();
-    windowInSecondary->consumeEvent(AINPUT_EVENT_TYPE_MOTION, SECOND_DISPLAY_ID);
-    monitorInSecondary->consumeEvent(AINPUT_EVENT_TYPE_MOTION, SECOND_DISPLAY_ID);
+    windowInSecondary->consumeMotionDown(SECOND_DISPLAY_ID);
+    monitorInSecondary->consumeMotionDown(SECOND_DISPLAY_ID);
 
     // Test inject a non-pointer motion event.
     // If specific a display, it will dispatch to the focused window of particular display,
@@ -895,8 +883,8 @@
             << "Inject motion event should return INPUT_EVENT_INJECTION_SUCCEEDED";
     windowInPrimary->assertNoEvents();
     monitorInPrimary->assertNoEvents();
-    windowInSecondary->consumeEvent(AINPUT_EVENT_TYPE_MOTION, ADISPLAY_ID_NONE);
-    monitorInSecondary->consumeEvent(AINPUT_EVENT_TYPE_MOTION, ADISPLAY_ID_NONE);
+    windowInSecondary->consumeMotionDown(ADISPLAY_ID_NONE);
+    monitorInSecondary->consumeMotionDown(ADISPLAY_ID_NONE);
 }
 
 // Test per-display input monitors for key event.
@@ -912,8 +900,8 @@
             << "Inject key event should return INPUT_EVENT_INJECTION_SUCCEEDED";
     windowInPrimary->assertNoEvents();
     monitorInPrimary->assertNoEvents();
-    windowInSecondary->consumeEvent(AINPUT_EVENT_TYPE_KEY, ADISPLAY_ID_NONE);
-    monitorInSecondary->consumeEvent(AINPUT_EVENT_TYPE_KEY, ADISPLAY_ID_NONE);
+    windowInSecondary->consumeKeyDown(ADISPLAY_ID_NONE);
+    monitorInSecondary->consumeKeyDown(ADISPLAY_ID_NONE);
 }
 
 class InputFilterTest : public InputDispatcherTest {
@@ -931,7 +919,7 @@
         mDispatcher->notifyMotion(&motionArgs);
 
         if (expectToBeFiltered) {
-            mFakePolicy->assertFilterInputEventWasCalledWithExpectedArgs(&motionArgs);
+            mFakePolicy->assertFilterInputEventWasCalled(motionArgs);
         } else {
             mFakePolicy->assertFilterInputEventWasNotCalled();
         }
@@ -946,7 +934,7 @@
         mDispatcher->notifyKey(&keyArgs);
 
         if (expectToBeFiltered) {
-            mFakePolicy->assertFilterInputEventWasCalledWithExpectedArgs(&keyArgs);
+            mFakePolicy->assertFilterInputEventWasCalled(keyArgs);
         } else {
             mFakePolicy->assertFilterInputEventWasNotCalled();
         }
diff --git a/services/inputflinger/tests/InputReader_test.cpp b/services/inputflinger/tests/InputReader_test.cpp
index 8d4ab6a..c1c9122 100644
--- a/services/inputflinger/tests/InputReader_test.cpp
+++ b/services/inputflinger/tests/InputReader_test.cpp
@@ -1133,8 +1133,12 @@
 protected:
     sp<FakeInputReaderPolicy> mFakePolicy;
 
-    virtual void SetUp() override { mFakePolicy = new FakeInputReaderPolicy(); }
-    virtual void TearDown() override { mFakePolicy.clear(); }
+    virtual void SetUp() {
+        mFakePolicy = new FakeInputReaderPolicy();
+    }
+    virtual void TearDown() {
+        mFakePolicy.clear();
+    }
 };
 
 /**
@@ -1317,20 +1321,18 @@
     sp<TestInputListener> mFakeListener;
     sp<FakeInputReaderPolicy> mFakePolicy;
     std::shared_ptr<FakeEventHub> mFakeEventHub;
-    std::unique_ptr<InstrumentedInputReader> mReader;
+    sp<InstrumentedInputReader> mReader;
 
-    virtual void SetUp() override {
+    virtual void SetUp() {
         mFakeEventHub = std::make_unique<FakeEventHub>();
         mFakePolicy = new FakeInputReaderPolicy();
         mFakeListener = new TestInputListener();
 
-        mReader = std::make_unique<InstrumentedInputReader>(mFakeEventHub, mFakePolicy,
-                                                            mFakeListener);
-        ASSERT_EQ(OK, mReader->start());
+        mReader = new InstrumentedInputReader(mFakeEventHub, mFakePolicy, mFakeListener);
     }
 
-    virtual void TearDown() override {
-        ASSERT_EQ(OK, mReader->stop());
+    virtual void TearDown() {
+        mReader.clear();
 
         mFakeListener.clear();
         mFakePolicy.clear();
@@ -1344,18 +1346,24 @@
             mFakeEventHub->addConfigurationMap(deviceId, configuration);
         }
         mFakeEventHub->finishDeviceScan();
+        mReader->loopOnce();
+        mReader->loopOnce();
         ASSERT_NO_FATAL_FAILURE(mFakePolicy->assertInputDevicesChanged());
         ASSERT_NO_FATAL_FAILURE(mFakeEventHub->assertQueueIsEmpty());
     }
 
     void disableDevice(int32_t deviceId, InputDevice* device) {
         mFakePolicy->addDisabledDevice(deviceId);
-        mReader->requestRefreshConfiguration(InputReaderConfiguration::CHANGE_ENABLED_STATE);
+        configureDevice(InputReaderConfiguration::CHANGE_ENABLED_STATE, device);
     }
 
     void enableDevice(int32_t deviceId, InputDevice* device) {
         mFakePolicy->removeDisabledDevice(deviceId);
-        mReader->requestRefreshConfiguration(InputReaderConfiguration::CHANGE_ENABLED_STATE);
+        configureDevice(InputReaderConfiguration::CHANGE_ENABLED_STATE, device);
+    }
+
+    void configureDevice(uint32_t changes, InputDevice* device) {
+        device->configure(ARBITRARY_TIME, mFakePolicy->getReaderConfiguration(), changes);
     }
 
     FakeInputMapper* addDeviceWithFakeInputMapper(int32_t deviceId, int32_t controllerNumber,
@@ -1409,22 +1417,28 @@
 
     NotifyDeviceResetArgs resetArgs;
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyDeviceResetWasCalled(&resetArgs));
+    ASSERT_EQ(ARBITRARY_TIME, resetArgs.eventTime);
     ASSERT_EQ(deviceId, resetArgs.deviceId);
 
     ASSERT_EQ(device->isEnabled(), true);
     disableDevice(deviceId, device);
+    mReader->loopOnce();
 
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyDeviceResetWasCalled(&resetArgs));
+    ASSERT_EQ(ARBITRARY_TIME, resetArgs.eventTime);
     ASSERT_EQ(deviceId, resetArgs.deviceId);
     ASSERT_EQ(device->isEnabled(), false);
 
     disableDevice(deviceId, device);
+    mReader->loopOnce();
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyDeviceResetWasNotCalled());
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyConfigurationChangedWasNotCalled());
     ASSERT_EQ(device->isEnabled(), false);
 
     enableDevice(deviceId, device);
+    mReader->loopOnce();
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyDeviceResetWasCalled(&resetArgs));
+    ASSERT_EQ(ARBITRARY_TIME, resetArgs.eventTime);
     ASSERT_EQ(deviceId, resetArgs.deviceId);
     ASSERT_EQ(device->isEnabled(), true);
 }
@@ -1546,7 +1560,7 @@
     ASSERT_TRUE(flags[0] && flags[1] && !flags[2] && !flags[3]);
 }
 
-TEST_F(InputReaderTest, WhenDeviceScanFinished_SendsConfigurationChanged) {
+TEST_F(InputReaderTest, LoopOnce_WhenDeviceScanFinished_SendsConfigurationChanged) {
     addDevice(1, "ignored", INPUT_DEVICE_CLASS_KEYBOARD, nullptr);
 
     NotifyConfigurationChangedArgs args;
@@ -1555,12 +1569,13 @@
     ASSERT_EQ(ARBITRARY_TIME, args.eventTime);
 }
 
-TEST_F(InputReaderTest, ForwardsRawEventsToMappers) {
+TEST_F(InputReaderTest, LoopOnce_ForwardsRawEventsToMappers) {
     FakeInputMapper* mapper = nullptr;
     ASSERT_NO_FATAL_FAILURE(mapper = addDeviceWithFakeInputMapper(1, 0, "fake",
             INPUT_DEVICE_CLASS_KEYBOARD, AINPUT_SOURCE_KEYBOARD, nullptr));
 
     mFakeEventHub->enqueueEvent(0, 1, EV_KEY, KEY_A, 1);
+    mReader->loopOnce();
     ASSERT_NO_FATAL_FAILURE(mFakeEventHub->assertQueueIsEmpty());
 
     RawEvent event;
@@ -1587,16 +1602,19 @@
     uint32_t prevSequenceNum = resetArgs.sequenceNum;
 
     disableDevice(deviceId, device);
+    mReader->loopOnce();
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyDeviceResetWasCalled(&resetArgs));
     ASSERT_TRUE(prevSequenceNum < resetArgs.sequenceNum);
     prevSequenceNum = resetArgs.sequenceNum;
 
     enableDevice(deviceId, device);
+    mReader->loopOnce();
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyDeviceResetWasCalled(&resetArgs));
     ASSERT_TRUE(prevSequenceNum < resetArgs.sequenceNum);
     prevSequenceNum = resetArgs.sequenceNum;
 
     disableDevice(deviceId, device);
+    mReader->loopOnce();
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyDeviceResetWasCalled(&resetArgs));
     ASSERT_TRUE(prevSequenceNum < resetArgs.sequenceNum);
     prevSequenceNum = resetArgs.sequenceNum;
@@ -1611,6 +1629,7 @@
     FakeInputMapper* mapper = new FakeInputMapper(device, AINPUT_SOURCE_TOUCHSCREEN);
     device->addMapper(mapper);
     mReader->setNextDevice(device);
+    addDevice(deviceId, "fake", deviceClass, nullptr);
 
     const uint8_t hdmi1 = 1;
 
@@ -1618,20 +1637,13 @@
     mFakePolicy->addInputPortAssociation(DEVICE_LOCATION, hdmi1);
 
     // Add default and second display.
-    mFakePolicy->clearViewports();
     mFakePolicy->addDisplayViewport(DISPLAY_ID, DISPLAY_WIDTH, DISPLAY_HEIGHT,
             DISPLAY_ORIENTATION_0, "local:0", NO_PORT, ViewportType::VIEWPORT_INTERNAL);
     mFakePolicy->addDisplayViewport(SECONDARY_DISPLAY_ID, DISPLAY_WIDTH, DISPLAY_HEIGHT,
             DISPLAY_ORIENTATION_0, "local:1", hdmi1, ViewportType::VIEWPORT_EXTERNAL);
     mReader->requestRefreshConfiguration(InputReaderConfiguration::CHANGE_DISPLAY_INFO);
-
-    // Add the device, and make sure all of the callbacks are triggered.
-    // The device is added after the input port associations are processed since
-    // we do not yet support dynamic device-to-display associations.
-    ASSERT_NO_FATAL_FAILURE(addDevice(deviceId, "fake", deviceClass, nullptr));
+    mReader->loopOnce();
     ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyConfigurationChangedWasCalled());
-    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyDeviceResetWasCalled());
-    ASSERT_NO_FATAL_FAILURE(mapper->assertConfigureWasCalled());
 
     // Device should only dispatch to the specified display.
     ASSERT_EQ(deviceId, device->getId());
@@ -1640,8 +1652,6 @@
 
     // Can't dispatch event from a disabled device.
     disableDevice(deviceId, device);
-    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyDeviceResetWasCalled());
-    ASSERT_NO_FATAL_FAILURE(mapper->assertConfigureWasCalled());
     ASSERT_FALSE(mReader->canDispatchToDisplay(deviceId, SECONDARY_DISPLAY_ID));
 }
 
@@ -1664,7 +1674,7 @@
 
     InputDevice* mDevice;
 
-    virtual void SetUp() override {
+    virtual void SetUp() {
         mFakeEventHub = std::make_unique<FakeEventHub>();
         mFakePolicy = new FakeInputReaderPolicy();
         mFakeListener = new TestInputListener();
@@ -1678,7 +1688,7 @@
                 DEVICE_CONTROLLER_NUMBER, identifier, DEVICE_CLASSES);
     }
 
-    virtual void TearDown() override {
+    virtual void TearDown() {
         delete mDevice;
 
         delete mFakeContext;
@@ -1902,7 +1912,7 @@
     FakeInputReaderContext* mFakeContext;
     InputDevice* mDevice;
 
-    virtual void SetUp() override {
+    virtual void SetUp() {
         mFakeEventHub = std::make_unique<FakeEventHub>();
         mFakePolicy = new FakeInputReaderPolicy();
         mFakeListener = new TestInputListener();
@@ -1916,7 +1926,7 @@
         mFakeEventHub->addDevice(mDevice->getId(), DEVICE_NAME, 0);
     }
 
-    virtual void TearDown() override {
+    virtual void TearDown() {
         delete mDevice;
         delete mFakeContext;
         mFakeListener.clear();
@@ -2579,7 +2589,7 @@
 
     sp<FakePointerController> mFakePointerController;
 
-    virtual void SetUp() override {
+    virtual void SetUp() {
         InputMapperTest::SetUp();
 
         mFakePointerController = new FakePointerController();
diff --git a/services/surfaceflinger/Android.bp b/services/surfaceflinger/Android.bp
index f529a44..4b71bd8 100644
--- a/services/surfaceflinger/Android.bp
+++ b/services/surfaceflinger/Android.bp
@@ -165,7 +165,9 @@
         "Scheduler/PhaseOffsets.cpp",
         "Scheduler/Scheduler.cpp",
         "Scheduler/SchedulerUtils.cpp",
+        "Scheduler/Timer.cpp",
         "Scheduler/VSyncDispatchTimerQueue.cpp",
+        "Scheduler/VSyncPredictor.cpp",
         "Scheduler/VSyncModulator.cpp",
         "StartPropertySetThread.cpp",
         "SurfaceFlinger.cpp",
diff --git a/services/surfaceflinger/BufferLayer.cpp b/services/surfaceflinger/BufferLayer.cpp
index a25709c..94c4a81 100644
--- a/services/surfaceflinger/BufferLayer.cpp
+++ b/services/surfaceflinger/BufferLayer.cpp
@@ -77,9 +77,9 @@
         // with the clone layer trying to use the deleted texture.
         mFlinger->deleteTextureAsync(mTextureName);
     }
-    const int32_t layerID = getSequence();
-    mFlinger->mTimeStats->onDestroy(layerID);
-    mFlinger->mFrameTracer->onDestroy(layerID);
+    const int32_t layerId = getSequence();
+    mFlinger->mTimeStats->onDestroy(layerId);
+    mFlinger->mFrameTracer->onDestroy(layerId);
 }
 
 void BufferLayer::useSurfaceDamage() {
@@ -286,7 +286,7 @@
     return hasReadyFrame();
 }
 
-bool BufferLayer::onPostComposition(const std::optional<DisplayId>& displayId,
+bool BufferLayer::onPostComposition(sp<const DisplayDevice> displayDevice,
                                     const std::shared_ptr<FenceTime>& glDoneFence,
                                     const std::shared_ptr<FenceTime>& presentFence,
                                     const CompositorTiming& compositorTiming) {
@@ -305,8 +305,16 @@
     nsecs_t desiredPresentTime = mBufferInfo.mDesiredPresentTime;
     mFrameTracker.setDesiredPresentTime(desiredPresentTime);
 
-    const int32_t layerID = getSequence();
-    mFlinger->mTimeStats->setDesiredTime(layerID, mCurrentFrameNumber, desiredPresentTime);
+    const int32_t layerId = getSequence();
+    mFlinger->mTimeStats->setDesiredTime(layerId, mCurrentFrameNumber, desiredPresentTime);
+
+    const auto outputLayer = findOutputLayerForDisplay(displayDevice);
+    if (outputLayer && outputLayer->requiresClientComposition()) {
+        nsecs_t clientCompositionTimestamp = outputLayer->getState().clientCompositionTimestamp;
+        mFlinger->mFrameTracer->traceTimestamp(layerId, getCurrentBufferId(), mCurrentFrameNumber,
+                                               clientCompositionTimestamp,
+                                               FrameTracer::FrameEvent::FALLBACK_COMPOSITION);
+    }
 
     std::shared_ptr<FenceTime> frameReadyFence = mBufferInfo.mFenceTime;
     if (frameReadyFence->isValid()) {
@@ -317,17 +325,18 @@
         mFrameTracker.setFrameReadyTime(desiredPresentTime);
     }
 
+    const auto displayId = displayDevice->getId();
     if (presentFence->isValid()) {
-        mFlinger->mTimeStats->setPresentFence(layerID, mCurrentFrameNumber, presentFence);
-        mFlinger->mFrameTracer->traceFence(layerID, getCurrentBufferId(), mCurrentFrameNumber,
+        mFlinger->mTimeStats->setPresentFence(layerId, mCurrentFrameNumber, presentFence);
+        mFlinger->mFrameTracer->traceFence(layerId, getCurrentBufferId(), mCurrentFrameNumber,
                                            presentFence, FrameTracer::FrameEvent::PRESENT_FENCE);
         mFrameTracker.setActualPresentFence(std::shared_ptr<FenceTime>(presentFence));
     } else if (displayId && mFlinger->getHwComposer().isConnected(*displayId)) {
         // The HWC doesn't support present fences, so use the refresh
         // timestamp instead.
         const nsecs_t actualPresentTime = mFlinger->getHwComposer().getRefreshTimestamp(*displayId);
-        mFlinger->mTimeStats->setPresentTime(layerID, mCurrentFrameNumber, actualPresentTime);
-        mFlinger->mFrameTracer->traceTimestamp(layerID, getCurrentBufferId(), mCurrentFrameNumber,
+        mFlinger->mTimeStats->setPresentTime(layerId, mCurrentFrameNumber, actualPresentTime);
+        mFlinger->mFrameTracer->traceTimestamp(layerId, getCurrentBufferId(), mCurrentFrameNumber,
                                                actualPresentTime,
                                                FrameTracer::FrameEvent::PRESENT_FENCE);
         mFrameTracker.setActualPresentTime(actualPresentTime);
diff --git a/services/surfaceflinger/BufferLayer.h b/services/surfaceflinger/BufferLayer.h
index 656ba12..16855d2 100644
--- a/services/surfaceflinger/BufferLayer.h
+++ b/services/surfaceflinger/BufferLayer.h
@@ -78,7 +78,7 @@
 
     bool isHdrY410() const override;
 
-    bool onPostComposition(const std::optional<DisplayId>& displayId,
+    bool onPostComposition(sp<const DisplayDevice> displayDevice,
                            const std::shared_ptr<FenceTime>& glDoneFence,
                            const std::shared_ptr<FenceTime>& presentFence,
                            const CompositorTiming& compositorTiming) override;
diff --git a/services/surfaceflinger/BufferQueueLayer.cpp b/services/surfaceflinger/BufferQueueLayer.cpp
index dc61e49..d51d34b 100644
--- a/services/surfaceflinger/BufferQueueLayer.cpp
+++ b/services/surfaceflinger/BufferQueueLayer.cpp
@@ -223,7 +223,7 @@
     // BufferItem's that weren't actually queued. This can happen in shared
     // buffer mode.
     bool queuedBuffer = false;
-    const int32_t layerID = getSequence();
+    const int32_t layerId = getSequence();
     LayerRejecter r(mDrawingState, getCurrentState(), recomputeVisibleRegions,
                     getProducerStickyTransform() != 0, mName, mOverrideScalingMode,
                     getTransformToDisplayInverse());
@@ -264,7 +264,7 @@
         if (queuedBuffer) {
             Mutex::Autolock lock(mQueueItemLock);
             mConsumer->mergeSurfaceDamage(mQueueItems[0].mSurfaceDamage);
-            mFlinger->mTimeStats->removeTimeRecord(layerID, mQueueItems[0].mFrameNumber);
+            mFlinger->mTimeStats->removeTimeRecord(layerId, mQueueItems[0].mFrameNumber);
             mQueueItems.removeAt(0);
             mQueuedFrames--;
         }
@@ -278,8 +278,8 @@
             Mutex::Autolock lock(mQueueItemLock);
             mQueueItems.clear();
             mQueuedFrames = 0;
-            mFlinger->mTimeStats->onDestroy(layerID);
-            mFlinger->mFrameTracer->onDestroy(layerID);
+            mFlinger->mTimeStats->onDestroy(layerId);
+            mFlinger->mFrameTracer->onDestroy(layerId);
         }
 
         // Once we have hit this state, the shadow queue may no longer
@@ -301,19 +301,17 @@
         // updateTexImage
         while (mQueueItems[0].mFrameNumber != currentFrameNumber) {
             mConsumer->mergeSurfaceDamage(mQueueItems[0].mSurfaceDamage);
-            mFlinger->mTimeStats->removeTimeRecord(layerID, mQueueItems[0].mFrameNumber);
+            mFlinger->mTimeStats->removeTimeRecord(layerId, mQueueItems[0].mFrameNumber);
             mQueueItems.removeAt(0);
             mQueuedFrames--;
         }
 
         uint64_t bufferID = mQueueItems[0].mGraphicBuffer->getId();
-        mFlinger->mTimeStats->setAcquireFence(layerID, currentFrameNumber,
-                                              mQueueItems[0].mFenceTime);
-        mFlinger->mFrameTracer->traceFence(layerID, bufferID, currentFrameNumber,
+        mFlinger->mFrameTracer->traceFence(layerId, bufferID, currentFrameNumber,
                                            mQueueItems[0].mFenceTime,
                                            FrameTracer::FrameEvent::ACQUIRE_FENCE);
-        mFlinger->mTimeStats->setLatchTime(layerID, currentFrameNumber, latchTime);
-        mFlinger->mFrameTracer->traceTimestamp(layerID, bufferID, currentFrameNumber, latchTime,
+        mFlinger->mTimeStats->setLatchTime(layerId, currentFrameNumber, latchTime);
+        mFlinger->mFrameTracer->traceTimestamp(layerId, bufferID, currentFrameNumber, latchTime,
                                                FrameTracer::FrameEvent::LATCH);
 
         mQueueItems.removeAt(0);
@@ -373,38 +371,36 @@
 // -----------------------------------------------------------------------
 
 void BufferQueueLayer::onFrameDequeued(const uint64_t bufferId) {
-    const int32_t layerID = getSequence();
-    mFlinger->mFrameTracer->traceNewLayer(layerID, getName().c_str());
-    mFlinger->mFrameTracer->traceTimestamp(layerID, bufferId, FrameTracer::UNSPECIFIED_FRAME_NUMBER,
+    const int32_t layerId = getSequence();
+    mFlinger->mFrameTracer->traceNewLayer(layerId, getName().c_str());
+    mFlinger->mFrameTracer->traceTimestamp(layerId, bufferId, FrameTracer::UNSPECIFIED_FRAME_NUMBER,
                                            systemTime(), FrameTracer::FrameEvent::DEQUEUE);
 }
 
 void BufferQueueLayer::onFrameDetached(const uint64_t bufferId) {
-    const int32_t layerID = getSequence();
-    mFlinger->mFrameTracer->traceNewLayer(layerID, getName().c_str());
-    mFlinger->mFrameTracer->traceTimestamp(layerID, bufferId, FrameTracer::UNSPECIFIED_FRAME_NUMBER,
+    const int32_t layerId = getSequence();
+    mFlinger->mFrameTracer->traceNewLayer(layerId, getName().c_str());
+    mFlinger->mFrameTracer->traceTimestamp(layerId, bufferId, FrameTracer::UNSPECIFIED_FRAME_NUMBER,
                                            systemTime(), FrameTracer::FrameEvent::DETACH);
 }
 
 void BufferQueueLayer::onFrameCancelled(const uint64_t bufferId) {
-    const int32_t layerID = getSequence();
-    mFlinger->mFrameTracer->traceTimestamp(layerID, bufferId, FrameTracer::UNSPECIFIED_FRAME_NUMBER,
+    const int32_t layerId = getSequence();
+    mFlinger->mFrameTracer->traceTimestamp(layerId, bufferId, FrameTracer::UNSPECIFIED_FRAME_NUMBER,
                                            systemTime(), FrameTracer::FrameEvent::CANCEL);
 }
 
 void BufferQueueLayer::onFrameAvailable(const BufferItem& item) {
-    const int32_t layerID = getSequence();
-    mFlinger->mFrameTracer->traceTimestamp(layerID, item.mGraphicBuffer->getId(), item.mFrameNumber,
+    const int32_t layerId = getSequence();
+    mFlinger->mFrameTracer->traceTimestamp(layerId, item.mGraphicBuffer->getId(), item.mFrameNumber,
                                            systemTime(), FrameTracer::FrameEvent::QUEUE);
 
     ATRACE_CALL();
     // Add this buffer from our internal queue tracker
     { // Autolock scope
-        if (mFlinger->mUseSmart90ForVideo) {
-            const nsecs_t presentTime = item.mIsAutoTimestamp ? 0 : item.mTimestamp;
-            mFlinger->mScheduler->recordLayerHistory(this, presentTime,
-                                                     item.mHdrMetadata.validTypes != 0);
-        }
+        const nsecs_t presentTime = item.mIsAutoTimestamp ? 0 : item.mTimestamp;
+        const bool isHDR = item.mHdrMetadata.validTypes != 0;
+        mFlinger->mScheduler->recordLayerHistory(this, presentTime, isHDR);
 
         Mutex::Autolock lock(mQueueItemLock);
         // Reset the frame number tracker when we receive the first buffer after
diff --git a/services/surfaceflinger/BufferStateLayer.cpp b/services/surfaceflinger/BufferStateLayer.cpp
index 5768edd..d68fe8e 100644
--- a/services/surfaceflinger/BufferStateLayer.cpp
+++ b/services/surfaceflinger/BufferStateLayer.cpp
@@ -240,18 +240,15 @@
     mCurrentState.modified = true;
     setTransactionFlags(eTransactionNeeded);
 
-    const int32_t layerID = getSequence();
-    mFlinger->mTimeStats->setPostTime(layerID, mFrameNumber, getName().c_str(), postTime);
-    mFlinger->mFrameTracer->traceNewLayer(layerID, getName().c_str());
-    mFlinger->mFrameTracer->traceTimestamp(layerID, buffer->getId(), mFrameNumber, postTime,
+    const int32_t layerId = getSequence();
+    mFlinger->mTimeStats->setPostTime(layerId, mFrameNumber, getName().c_str(), postTime);
+    mFlinger->mFrameTracer->traceNewLayer(layerId, getName().c_str());
+    mFlinger->mFrameTracer->traceTimestamp(layerId, buffer->getId(), mFrameNumber, postTime,
                                            FrameTracer::FrameEvent::POST);
     mCurrentState.desiredPresentTime = desiredPresentTime;
 
-    if (mFlinger->mUseSmart90ForVideo) {
-        const nsecs_t presentTime = (desiredPresentTime == -1) ? 0 : desiredPresentTime;
-        mFlinger->mScheduler->recordLayerHistory(this, presentTime,
-                                                 mCurrentState.hdrMetadata.validTypes != 0);
-    }
+    const bool isHDR = mCurrentState.hdrMetadata.validTypes != 0;
+    mFlinger->mScheduler->recordLayerHistory(this, desiredPresentTime, isHDR);
 
     return true;
 }
@@ -461,7 +458,7 @@
         return NO_ERROR;
     }
 
-    const int32_t layerID = getSequence();
+    const int32_t layerId = getSequence();
 
     // Reject if the layer is invalid
     uint32_t bufferWidth = s.buffer->width;
@@ -483,7 +480,7 @@
         ALOGE("[%s] rejecting buffer: "
               "bufferWidth=%d, bufferHeight=%d, front.active.{w=%d, h=%d}",
               getDebugName(), bufferWidth, bufferHeight, s.active.w, s.active.h);
-        mFlinger->mTimeStats->removeTimeRecord(layerID, mFrameNumber);
+        mFlinger->mTimeStats->removeTimeRecord(layerId, mFrameNumber);
         return BAD_VALUE;
     }
 
@@ -500,18 +497,18 @@
         // a GL-composited layer) not at all.
         status_t err = bindTextureImage();
         if (err != NO_ERROR) {
-            mFlinger->mTimeStats->onDestroy(layerID);
-            mFlinger->mFrameTracer->onDestroy(layerID);
+            mFlinger->mTimeStats->onDestroy(layerId);
+            mFlinger->mFrameTracer->onDestroy(layerId);
             return BAD_VALUE;
         }
     }
 
     const uint64_t bufferID = getCurrentBufferId();
-    mFlinger->mTimeStats->setAcquireFence(layerID, mFrameNumber, mBufferInfo.mFenceTime);
-    mFlinger->mFrameTracer->traceFence(layerID, bufferID, mFrameNumber, mBufferInfo.mFenceTime,
+    mFlinger->mTimeStats->setAcquireFence(layerId, mFrameNumber, mBufferInfo.mFenceTime);
+    mFlinger->mFrameTracer->traceFence(layerId, bufferID, mFrameNumber, mBufferInfo.mFenceTime,
                                        FrameTracer::FrameEvent::ACQUIRE_FENCE);
-    mFlinger->mTimeStats->setLatchTime(layerID, mFrameNumber, latchTime);
-    mFlinger->mFrameTracer->traceTimestamp(layerID, bufferID, mFrameNumber, latchTime,
+    mFlinger->mTimeStats->setLatchTime(layerId, mFrameNumber, latchTime);
+    mFlinger->mFrameTracer->traceTimestamp(layerId, bufferID, mFrameNumber, latchTime,
                                            FrameTracer::FrameEvent::LATCH);
 
     mCurrentStateModified = false;
diff --git a/services/surfaceflinger/ClientCache.cpp b/services/surfaceflinger/ClientCache.cpp
index 16fe27c..a5be01c 100644
--- a/services/surfaceflinger/ClientCache.cpp
+++ b/services/surfaceflinger/ClientCache.cpp
@@ -42,7 +42,7 @@
         return false;
     }
 
-    auto& processBuffers = it->second;
+    auto& processBuffers = it->second.second;
 
     auto bufItr = processBuffers.find(id);
     if (bufItr == processBuffers.end()) {
@@ -86,12 +86,14 @@
             return false;
         }
         auto [itr, success] =
-                mBuffers.emplace(processToken, std::unordered_map<uint64_t, ClientCacheBuffer>());
+                mBuffers.emplace(processToken,
+                                 std::make_pair(token,
+                                                std::unordered_map<uint64_t, ClientCacheBuffer>()));
         LOG_ALWAYS_FATAL_IF(!success, "failed to insert new process into client cache");
         it = itr;
     }
 
-    auto& processBuffers = it->second;
+    auto& processBuffers = it->second.second;
 
     if (processBuffers.size() > BUFFER_CACHE_MAX_SIZE) {
         ALOGE("failed to cache buffer: cache is full");
@@ -120,7 +122,7 @@
             }
         }
 
-        mBuffers[processToken].erase(id);
+        mBuffers[processToken].second.erase(id);
     }
 
     for (auto& recipient : pendingErase) {
@@ -180,7 +182,7 @@
             return;
         }
 
-        for (auto& [id, clientCacheBuffer] : itr->second) {
+        for (auto& [id, clientCacheBuffer] : itr->second.second) {
             client_cache_t cacheId = {processToken, id};
             for (auto& recipient : clientCacheBuffer.recipients) {
                 sp<ErasedRecipient> erasedRecipient = recipient.promote();
diff --git a/services/surfaceflinger/ClientCache.h b/services/surfaceflinger/ClientCache.h
index aa6c80d..d7af7c0 100644
--- a/services/surfaceflinger/ClientCache.h
+++ b/services/surfaceflinger/ClientCache.h
@@ -61,7 +61,8 @@
         std::set<wp<ErasedRecipient>> recipients;
     };
     std::map<wp<IBinder> /*caching process*/,
-             std::unordered_map<uint64_t /*cache id*/, ClientCacheBuffer>>
+             std::pair<sp<IBinder> /*strong ref to caching process*/,
+                       std::unordered_map<uint64_t /*cache id*/, ClientCacheBuffer>>>
             mBuffers GUARDED_BY(mMutex);
 
     class CacheDeathRecipient : public IBinder::DeathRecipient {
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayerCompositionState.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayerCompositionState.h
index 1347449..11cfccc 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayerCompositionState.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/OutputLayerCompositionState.h
@@ -98,6 +98,9 @@
 
     // Debugging
     void dump(std::string& result) const;
+
+    // Timestamp for when the layer is queued for client composition
+    nsecs_t clientCompositionTimestamp;
 };
 
 } // namespace compositionengine::impl
diff --git a/services/surfaceflinger/CompositionEngine/src/Output.cpp b/services/surfaceflinger/CompositionEngine/src/Output.cpp
index 1953005..6877f8b 100644
--- a/services/surfaceflinger/CompositionEngine/src/Output.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/Output.cpp
@@ -904,6 +904,7 @@
                     layerSettings.disableBlending = true;
                 }
 
+                layer->editState().clientCompositionTimestamp = systemTime();
                 clientCompositionLayers.push_back(*result);
             }
         }
diff --git a/services/surfaceflinger/CompositionEngine/tests/CompositionEngineTest.cpp b/services/surfaceflinger/CompositionEngine/tests/CompositionEngineTest.cpp
index 0dbf8f0..49e7c70 100644
--- a/services/surfaceflinger/CompositionEngine/tests/CompositionEngineTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/CompositionEngineTest.cpp
@@ -15,10 +15,12 @@
  */
 
 #include <compositionengine/CompositionRefreshArgs.h>
+#include <compositionengine/LayerFECompositionState.h>
 #include <compositionengine/impl/CompositionEngine.h>
 #include <compositionengine/mock/Layer.h>
 #include <compositionengine/mock/LayerFE.h>
 #include <compositionengine/mock/Output.h>
+#include <compositionengine/mock/OutputLayer.h>
 #include <gtest/gtest.h>
 #include <renderengine/mock/RenderEngine.h>
 
@@ -28,16 +30,28 @@
 namespace {
 
 using ::testing::_;
+using ::testing::InSequence;
+using ::testing::Ref;
 using ::testing::Return;
+using ::testing::ReturnRef;
 using ::testing::SaveArg;
 using ::testing::StrictMock;
 
-class CompositionEngineTest : public testing::Test {
-public:
+struct CompositionEngineTest : public testing::Test {
     android::mock::HWComposer* mHwc = new StrictMock<android::mock::HWComposer>();
     renderengine::mock::RenderEngine* mRenderEngine =
             new StrictMock<renderengine::mock::RenderEngine>();
     impl::CompositionEngine mEngine;
+    CompositionRefreshArgs mRefreshArgs;
+
+    std::shared_ptr<mock::Output> mOutput1{std::make_shared<StrictMock<mock::Output>>()};
+    std::shared_ptr<mock::Output> mOutput2{std::make_shared<StrictMock<mock::Output>>()};
+    std::shared_ptr<mock::Output> mOutput3{std::make_shared<StrictMock<mock::Output>>()};
+
+    std::shared_ptr<mock::Layer> mLayer1{std::make_shared<StrictMock<mock::Layer>>()};
+    std::shared_ptr<mock::Layer> mLayer2{std::make_shared<StrictMock<mock::Layer>>()};
+    std::shared_ptr<mock::Layer> mLayer3{std::make_shared<StrictMock<mock::Layer>>()};
+    std::shared_ptr<mock::Layer> mLayer4{std::make_shared<StrictMock<mock::Layer>>()};
 };
 
 TEST_F(CompositionEngineTest, canInstantiateCompositionEngine) {
@@ -58,38 +72,165 @@
 }
 
 /*
+ * CompositionEngine::present
+ */
+
+struct CompositionEnginePresentTest : public CompositionEngineTest {
+    struct CompositionEnginePartialMock : public impl::CompositionEngine {
+        // These are the overridable functions CompositionEngine::present() may
+        // call, and have separate test coverage.
+        MOCK_METHOD1(preComposition, void(CompositionRefreshArgs&));
+    };
+
+    StrictMock<CompositionEnginePartialMock> mEngine;
+};
+
+TEST_F(CompositionEnginePresentTest, worksWithEmptyRequest) {
+    // present() always calls preComposition()
+    EXPECT_CALL(mEngine, preComposition(Ref(mRefreshArgs)));
+
+    mEngine.present(mRefreshArgs);
+}
+
+TEST_F(CompositionEnginePresentTest, worksAsExpected) {
+    // Expect calls to in a certain sequence
+    InSequence seq;
+
+    // present() always calls preComposition()
+    EXPECT_CALL(mEngine, preComposition(Ref(mRefreshArgs)));
+
+    // The first step in presenting is to make sure all outputs are prepared.
+    EXPECT_CALL(*mOutput1, prepare(Ref(mRefreshArgs), _));
+    EXPECT_CALL(*mOutput2, prepare(Ref(mRefreshArgs), _));
+    EXPECT_CALL(*mOutput3, prepare(Ref(mRefreshArgs), _));
+
+    // The next step in presenting is to make sure all outputs have the latest
+    // state from the front-end (SurfaceFlinger).
+    EXPECT_CALL(*mOutput1, updateLayerStateFromFE(Ref(mRefreshArgs)));
+    EXPECT_CALL(*mOutput2, updateLayerStateFromFE(Ref(mRefreshArgs)));
+    EXPECT_CALL(*mOutput3, updateLayerStateFromFE(Ref(mRefreshArgs)));
+
+    // The last step is to actually present each output.
+    EXPECT_CALL(*mOutput1, present(Ref(mRefreshArgs)));
+    EXPECT_CALL(*mOutput2, present(Ref(mRefreshArgs)));
+    EXPECT_CALL(*mOutput3, present(Ref(mRefreshArgs)));
+
+    mRefreshArgs.outputs = {mOutput1, mOutput2, mOutput3};
+    mEngine.present(mRefreshArgs);
+}
+
+/*
+ * CompositionEngine::updateCursorAsync
+ */
+
+struct CompositionEngineUpdateCursorAsyncTest : public CompositionEngineTest {
+public:
+    CompositionEngineUpdateCursorAsyncTest() {
+        EXPECT_CALL(*mOutput1, getOutputLayerCount()).WillRepeatedly(Return(0));
+        EXPECT_CALL(*mOutput1, getOutputLayerOrderedByZByIndex(_)).Times(0);
+
+        EXPECT_CALL(*mOutput2, getOutputLayerCount()).WillRepeatedly(Return(1));
+        EXPECT_CALL(*mOutput2, getOutputLayerOrderedByZByIndex(0))
+                .WillRepeatedly(Return(&mOutput2OutputLayer1));
+
+        EXPECT_CALL(*mOutput3, getOutputLayerCount()).WillRepeatedly(Return(2));
+        EXPECT_CALL(*mOutput3, getOutputLayerOrderedByZByIndex(0))
+                .WillRepeatedly(Return(&mOutput3OutputLayer1));
+        EXPECT_CALL(*mOutput3, getOutputLayerOrderedByZByIndex(1))
+                .WillRepeatedly(Return(&mOutput3OutputLayer2));
+
+        EXPECT_CALL(mOutput2OutputLayer1, getLayerFE()).WillRepeatedly(ReturnRef(mOutput2Layer1FE));
+        EXPECT_CALL(mOutput3OutputLayer1, getLayerFE()).WillRepeatedly(ReturnRef(mOutput3Layer1FE));
+        EXPECT_CALL(mOutput3OutputLayer2, getLayerFE()).WillRepeatedly(ReturnRef(mOutput3Layer2FE));
+
+        EXPECT_CALL(mOutput2OutputLayer1, getLayer()).WillRepeatedly(ReturnRef(mOutput2Layer1));
+        EXPECT_CALL(mOutput3OutputLayer1, getLayer()).WillRepeatedly(ReturnRef(mOutput3Layer1));
+        EXPECT_CALL(mOutput3OutputLayer2, getLayer()).WillRepeatedly(ReturnRef(mOutput3Layer2));
+
+        EXPECT_CALL(mOutput2Layer1, editFEState()).WillRepeatedly(ReturnRef(mOutput2Layer1FEState));
+        EXPECT_CALL(mOutput3Layer1, editFEState()).WillRepeatedly(ReturnRef(mOutput3Layer1FEState));
+        EXPECT_CALL(mOutput3Layer2, editFEState()).WillRepeatedly(ReturnRef(mOutput3Layer2FEState));
+    }
+
+    StrictMock<mock::OutputLayer> mOutput2OutputLayer1;
+    StrictMock<mock::OutputLayer> mOutput3OutputLayer1;
+    StrictMock<mock::OutputLayer> mOutput3OutputLayer2;
+
+    StrictMock<mock::LayerFE> mOutput2Layer1FE;
+    StrictMock<mock::LayerFE> mOutput3Layer1FE;
+    StrictMock<mock::LayerFE> mOutput3Layer2FE;
+
+    StrictMock<mock::Layer> mOutput2Layer1;
+    StrictMock<mock::Layer> mOutput3Layer1;
+    StrictMock<mock::Layer> mOutput3Layer2;
+
+    LayerFECompositionState mOutput2Layer1FEState;
+    LayerFECompositionState mOutput3Layer1FEState;
+    LayerFECompositionState mOutput3Layer2FEState;
+};
+
+TEST_F(CompositionEngineUpdateCursorAsyncTest, handlesNoOutputs) {
+    mEngine.updateCursorAsync(mRefreshArgs);
+}
+
+TEST_F(CompositionEngineUpdateCursorAsyncTest, handlesNoLayersBeingCursorLayers) {
+    EXPECT_CALL(mOutput2OutputLayer1, isHardwareCursor()).WillRepeatedly(Return(false));
+    EXPECT_CALL(mOutput3OutputLayer1, isHardwareCursor()).WillRepeatedly(Return(false));
+    EXPECT_CALL(mOutput3OutputLayer2, isHardwareCursor()).WillRepeatedly(Return(false));
+
+    mRefreshArgs.outputs = {mOutput1, mOutput2, mOutput3};
+
+    mEngine.updateCursorAsync(mRefreshArgs);
+}
+
+TEST_F(CompositionEngineUpdateCursorAsyncTest, handlesMultipleLayersBeingCursorLayers) {
+    {
+        InSequence seq;
+        EXPECT_CALL(mOutput2OutputLayer1, isHardwareCursor()).WillRepeatedly(Return(true));
+        EXPECT_CALL(mOutput2Layer1FE, latchCursorCompositionState(Ref(mOutput2Layer1FEState)));
+        EXPECT_CALL(mOutput2OutputLayer1, writeCursorPositionToHWC());
+    }
+
+    {
+        InSequence seq;
+        EXPECT_CALL(mOutput3OutputLayer1, isHardwareCursor()).WillRepeatedly(Return(true));
+        EXPECT_CALL(mOutput3Layer1FE, latchCursorCompositionState(Ref(mOutput3Layer1FEState)));
+        EXPECT_CALL(mOutput3OutputLayer1, writeCursorPositionToHWC());
+    }
+
+    {
+        InSequence seq;
+        EXPECT_CALL(mOutput3OutputLayer2, isHardwareCursor()).WillRepeatedly(Return(true));
+        EXPECT_CALL(mOutput3Layer2FE, latchCursorCompositionState(Ref(mOutput3Layer2FEState)));
+        EXPECT_CALL(mOutput3OutputLayer2, writeCursorPositionToHWC());
+    }
+
+    mRefreshArgs.outputs = {mOutput1, mOutput2, mOutput3};
+
+    mEngine.updateCursorAsync(mRefreshArgs);
+}
+
+/*
  * CompositionEngine::preComposition
  */
 
-class PreCompositionTest : public CompositionEngineTest {
-public:
-    PreCompositionTest() {
+struct CompositionTestPreComposition : public CompositionEngineTest {
+    CompositionTestPreComposition() {
         EXPECT_CALL(*mLayer1, getLayerFE()).WillRepeatedly(Return(mLayer1FE));
         EXPECT_CALL(*mLayer2, getLayerFE()).WillRepeatedly(Return(mLayer2FE));
         EXPECT_CALL(*mLayer3, getLayerFE()).WillRepeatedly(Return(mLayer3FE));
         // getLayerFE() can return nullptr. Ensure that this is handled.
         EXPECT_CALL(*mLayer4, getLayerFE()).WillRepeatedly(Return(nullptr));
-
-        mRefreshArgs.outputs = {mOutput};
-        mRefreshArgs.layers = {mLayer1, mLayer2, mLayer3, mLayer4};
     }
 
-    std::shared_ptr<mock::Output> mOutput{std::make_shared<StrictMock<mock::Output>>()};
-    std::shared_ptr<mock::Layer> mLayer1{std::make_shared<StrictMock<mock::Layer>>()};
-    std::shared_ptr<mock::Layer> mLayer2{std::make_shared<StrictMock<mock::Layer>>()};
-    std::shared_ptr<mock::Layer> mLayer3{std::make_shared<StrictMock<mock::Layer>>()};
-    std::shared_ptr<mock::Layer> mLayer4{std::make_shared<StrictMock<mock::Layer>>()};
     sp<StrictMock<mock::LayerFE>> mLayer1FE{new StrictMock<mock::LayerFE>()};
     sp<StrictMock<mock::LayerFE>> mLayer2FE{new StrictMock<mock::LayerFE>()};
     sp<StrictMock<mock::LayerFE>> mLayer3FE{new StrictMock<mock::LayerFE>()};
-
-    CompositionRefreshArgs mRefreshArgs;
 };
 
-TEST_F(PreCompositionTest, preCompositionSetsFrameTimestamp) {
+TEST_F(CompositionTestPreComposition, preCompositionSetsFrameTimestamp) {
     const nsecs_t before = systemTime(SYSTEM_TIME_MONOTONIC);
-    CompositionRefreshArgs emptyArgs;
-    mEngine.preComposition(emptyArgs);
+    mEngine.preComposition(mRefreshArgs);
     const nsecs_t after = systemTime(SYSTEM_TIME_MONOTONIC);
 
     // The frame timestamp should be between the before and after timestamps
@@ -97,7 +238,7 @@
     EXPECT_LE(mEngine.getLastFrameRefreshTimestamp(), after);
 }
 
-TEST_F(PreCompositionTest, preCompositionInvokesLayerPreCompositionWithFrameTimestamp) {
+TEST_F(CompositionTestPreComposition, preCompositionInvokesLayerPreCompositionWithFrameTimestamp) {
     nsecs_t ts1 = 0;
     nsecs_t ts2 = 0;
     nsecs_t ts3 = 0;
@@ -105,6 +246,9 @@
     EXPECT_CALL(*mLayer2FE, onPreComposition(_)).WillOnce(DoAll(SaveArg<0>(&ts2), Return(false)));
     EXPECT_CALL(*mLayer3FE, onPreComposition(_)).WillOnce(DoAll(SaveArg<0>(&ts3), Return(false)));
 
+    mRefreshArgs.outputs = {mOutput1};
+    mRefreshArgs.layers = {mLayer1, mLayer2, mLayer3, mLayer4};
+
     mEngine.preComposition(mRefreshArgs);
 
     // Each of the onPreComposition calls should used the same refresh timestamp
@@ -113,24 +257,31 @@
     EXPECT_EQ(ts3, mEngine.getLastFrameRefreshTimestamp());
 }
 
-TEST_F(PreCompositionTest, preCompositionDefaultsToNoUpdateNeeded) {
+TEST_F(CompositionTestPreComposition, preCompositionDefaultsToNoUpdateNeeded) {
     EXPECT_CALL(*mLayer1FE, onPreComposition(_)).WillOnce(Return(false));
     EXPECT_CALL(*mLayer2FE, onPreComposition(_)).WillOnce(Return(false));
     EXPECT_CALL(*mLayer3FE, onPreComposition(_)).WillOnce(Return(false));
 
     mEngine.setNeedsAnotherUpdateForTest(true);
 
+    mRefreshArgs.outputs = {mOutput1};
+    mRefreshArgs.layers = {mLayer1, mLayer2, mLayer3, mLayer4};
+
     mEngine.preComposition(mRefreshArgs);
 
     // The call should have cleared the needsAnotherUpdate flag
     EXPECT_FALSE(mEngine.needsAnotherUpdate());
 }
 
-TEST_F(PreCompositionTest, preCompositionSetsNeedsAnotherUpdateIfAtLeastOneLayerRequestsIt) {
+TEST_F(CompositionTestPreComposition,
+       preCompositionSetsNeedsAnotherUpdateIfAtLeastOneLayerRequestsIt) {
     EXPECT_CALL(*mLayer1FE, onPreComposition(_)).WillOnce(Return(true));
     EXPECT_CALL(*mLayer2FE, onPreComposition(_)).WillOnce(Return(false));
     EXPECT_CALL(*mLayer3FE, onPreComposition(_)).WillOnce(Return(false));
 
+    mRefreshArgs.outputs = {mOutput1};
+    mRefreshArgs.layers = {mLayer1, mLayer2, mLayer3, mLayer4};
+
     mEngine.preComposition(mRefreshArgs);
 
     EXPECT_TRUE(mEngine.needsAnotherUpdate());
diff --git a/services/surfaceflinger/CompositionEngine/tests/OutputTest.cpp b/services/surfaceflinger/CompositionEngine/tests/OutputTest.cpp
index 7fce520..09ddc60 100644
--- a/services/surfaceflinger/CompositionEngine/tests/OutputTest.cpp
+++ b/services/surfaceflinger/CompositionEngine/tests/OutputTest.cpp
@@ -38,6 +38,8 @@
 namespace {
 
 using testing::_;
+using testing::InSequence;
+using testing::Ref;
 using testing::Return;
 using testing::ReturnRef;
 using testing::StrictMock;
@@ -49,6 +51,31 @@
 const mat4 kNonIdentityHalf = mat4() * 0.5;
 const mat4 kNonIdentityQuarter = mat4() * 0.25;
 
+struct OutputPartialMockBase : public impl::Output {
+    // compositionengine::Output overrides
+    const OutputCompositionState& getState() const override { return mState; }
+    OutputCompositionState& editState() override { return mState; }
+
+    // Use mocks for all the remaining virtual functions
+    // not implemented by the base implementation class.
+    MOCK_CONST_METHOD0(getOutputLayerCount, size_t());
+    MOCK_CONST_METHOD1(getOutputLayerOrderedByZByIndex, compositionengine::OutputLayer*(size_t));
+    MOCK_METHOD3(ensureOutputLayer,
+                 compositionengine::OutputLayer*(std::optional<size_t>,
+                                                 const std::shared_ptr<compositionengine::Layer>&,
+                                                 const sp<LayerFE>&));
+    MOCK_METHOD0(finalizePendingOutputLayers, void());
+    MOCK_METHOD0(clearOutputLayers, void());
+    MOCK_CONST_METHOD1(dumpState, void(std::string&));
+    MOCK_CONST_METHOD0(getCompositionEngine, const CompositionEngine&());
+    MOCK_METHOD2(injectOutputLayerForTest,
+                 compositionengine::OutputLayer*(const std::shared_ptr<compositionengine::Layer>&,
+                                                 const sp<LayerFE>&));
+    MOCK_METHOD1(injectOutputLayerForTest, void(std::unique_ptr<OutputLayer>));
+
+    impl::OutputCompositionState mState;
+};
+
 struct OutputTest : public testing::Test {
     class Output : public impl::Output {
     public:
@@ -483,6 +510,31 @@
 }
 
 /*
+ * Output::setReleasedLayers()
+ */
+
+using OutputSetReleasedLayersTest = OutputTest;
+
+TEST_F(OutputSetReleasedLayersTest, setReleasedLayersTakesGivenLayers) {
+    sp<StrictMock<mock::LayerFE>> layer1FE{new StrictMock<mock::LayerFE>()};
+    sp<StrictMock<mock::LayerFE>> layer2FE{new StrictMock<mock::LayerFE>()};
+    sp<StrictMock<mock::LayerFE>> layer3FE{new StrictMock<mock::LayerFE>()};
+
+    Output::ReleasedLayers layers;
+    layers.push_back(layer1FE);
+    layers.push_back(layer2FE);
+    layers.push_back(layer3FE);
+
+    mOutput->setReleasedLayers(std::move(layers));
+
+    const auto& setLayers = mOutput->getReleasedLayersForTest();
+    ASSERT_EQ(3u, setLayers.size());
+    ASSERT_EQ(layer1FE.get(), setLayers[0].promote().get());
+    ASSERT_EQ(layer2FE.get(), setLayers[1].promote().get());
+    ASSERT_EQ(layer3FE.get(), setLayers[2].promote().get());
+}
+
+/*
  * Output::updateAndWriteCompositionState()
  */
 
@@ -512,33 +564,10 @@
  */
 
 struct OutputPrepareFrameTest : public testing::Test {
-    struct OutputPartialMock : public impl::Output {
+    struct OutputPartialMock : public OutputPartialMockBase {
         // Sets up the helper functions called by prepareFrame to use a mock
         // implementations.
         MOCK_METHOD0(chooseCompositionStrategy, void());
-
-        // compositionengine::Output overrides
-        const OutputCompositionState& getState() const override { return mState; }
-        OutputCompositionState& editState() override { return mState; }
-
-        // These need implementations though are not expected to be called.
-        MOCK_CONST_METHOD0(getOutputLayerCount, size_t());
-        MOCK_CONST_METHOD1(getOutputLayerOrderedByZByIndex,
-                           compositionengine::OutputLayer*(size_t));
-        MOCK_METHOD3(ensureOutputLayer,
-                     compositionengine::OutputLayer*(
-                             std::optional<size_t>,
-                             const std::shared_ptr<compositionengine::Layer>&, const sp<LayerFE>&));
-        MOCK_METHOD0(finalizePendingOutputLayers, void());
-        MOCK_METHOD0(clearOutputLayers, void());
-        MOCK_CONST_METHOD1(dumpState, void(std::string&));
-        MOCK_CONST_METHOD0(getCompositionEngine, const CompositionEngine&());
-        MOCK_METHOD2(injectOutputLayerForTest,
-                     compositionengine::OutputLayer*(
-                             const std::shared_ptr<compositionengine::Layer>&, const sp<LayerFE>&));
-        MOCK_METHOD1(injectOutputLayerForTest, void(std::unique_ptr<OutputLayer>));
-
-        impl::OutputCompositionState mState;
     };
 
     OutputPrepareFrameTest() {
@@ -586,6 +615,73 @@
 }
 
 /*
+ * Output::present()
+ */
+
+struct OutputPresentTest : public testing::Test {
+    struct OutputPartialMock : public OutputPartialMockBase {
+        // All child helper functions Output::present() are defined as mocks,
+        // and those are tested separately, allowing the present() test to
+        // just cover the high level flow.
+        MOCK_METHOD1(updateColorProfile, void(const compositionengine::CompositionRefreshArgs&));
+        MOCK_METHOD1(updateAndWriteCompositionState,
+                     void(const compositionengine::CompositionRefreshArgs&));
+        MOCK_METHOD1(setColorTransform, void(const compositionengine::CompositionRefreshArgs&));
+        MOCK_METHOD0(beginFrame, void());
+        MOCK_METHOD0(prepareFrame, void());
+        MOCK_METHOD1(devOptRepaintFlash, void(const compositionengine::CompositionRefreshArgs&));
+        MOCK_METHOD1(finishFrame, void(const compositionengine::CompositionRefreshArgs&));
+        MOCK_METHOD0(postFramebuffer, void());
+    };
+
+    StrictMock<OutputPartialMock> mOutput;
+};
+
+TEST_F(OutputPresentTest, justInvokesChildFunctionsInSequence) {
+    CompositionRefreshArgs args;
+
+    InSequence seq;
+    EXPECT_CALL(mOutput, updateColorProfile(Ref(args)));
+    EXPECT_CALL(mOutput, updateAndWriteCompositionState(Ref(args)));
+    EXPECT_CALL(mOutput, setColorTransform(Ref(args)));
+    EXPECT_CALL(mOutput, beginFrame());
+    EXPECT_CALL(mOutput, prepareFrame());
+    EXPECT_CALL(mOutput, devOptRepaintFlash(Ref(args)));
+    EXPECT_CALL(mOutput, finishFrame(Ref(args)));
+    EXPECT_CALL(mOutput, postFramebuffer());
+
+    mOutput.present(args);
+}
+
+/*
+ * Output::updateColorProfile()
+ */
+
+// TODO(b/144060211) - Add coverage
+
+/*
+ * Output::beginFrame()
+ */
+
+/*
+ * Output::devOptRepaintFlash()
+ */
+
+// TODO(b/144060211) - Add coverage
+
+/*
+ * Output::finishFrame()
+ */
+
+// TODO(b/144060211) - Add coverage
+
+/*
+ * Output::postFramebuffer()
+ */
+
+// TODO(b/144060211) - Add coverage
+
+/*
  * Output::composeSurfaces()
  */
 
@@ -598,7 +694,7 @@
     static const Rect kDefaultOutputScissor;
     static const mat4 kDefaultColorTransformMat;
 
-    struct OutputPartialMock : public impl::Output {
+    struct OutputPartialMock : public OutputPartialMockBase {
         // Sets up the helper functions called by composeSurfaces to use a mock
         // implementations.
         MOCK_CONST_METHOD0(getSkipColorTransform, bool());
@@ -607,29 +703,6 @@
         MOCK_METHOD2(appendRegionFlashRequests,
                      void(const Region&, std::vector<renderengine::LayerSettings>&));
         MOCK_METHOD1(setExpensiveRenderingExpected, void(bool));
-
-        // compositionengine::Output overrides
-        const OutputCompositionState& getState() const override { return mState; }
-        OutputCompositionState& editState() override { return mState; }
-
-        // These need implementations though are not expected to be called.
-        MOCK_CONST_METHOD0(getOutputLayerCount, size_t());
-        MOCK_CONST_METHOD1(getOutputLayerOrderedByZByIndex,
-                           compositionengine::OutputLayer*(size_t));
-        MOCK_METHOD3(ensureOutputLayer,
-                     compositionengine::OutputLayer*(
-                             std::optional<size_t>,
-                             const std::shared_ptr<compositionengine::Layer>&, const sp<LayerFE>&));
-        MOCK_METHOD0(finalizePendingOutputLayers, void());
-        MOCK_METHOD0(clearOutputLayers, void());
-        MOCK_CONST_METHOD1(dumpState, void(std::string&));
-        MOCK_CONST_METHOD0(getCompositionEngine, const CompositionEngine&());
-        MOCK_METHOD2(injectOutputLayerForTest,
-                     compositionengine::OutputLayer*(
-                             const std::shared_ptr<compositionengine::Layer>&, const sp<LayerFE>&));
-        MOCK_METHOD1(injectOutputLayerForTest, void(std::unique_ptr<OutputLayer>));
-
-        impl::OutputCompositionState mState;
     };
 
     OutputComposeSurfacesTest() {
@@ -718,36 +791,13 @@
  */
 
 struct GenerateClientCompositionRequestsTest : public testing::Test {
-    struct OutputPartialMock : public impl::Output {
+    struct OutputPartialMock : public OutputPartialMockBase {
         // compositionengine::Output overrides
-
         std::vector<renderengine::LayerSettings> generateClientCompositionRequests(
                 bool supportsProtectedContent, Region& clearRegion) override {
             return impl::Output::generateClientCompositionRequests(supportsProtectedContent,
                                                                    clearRegion);
         }
-
-        const OutputCompositionState& getState() const override { return mState; }
-        OutputCompositionState& editState() override { return mState; }
-
-        // These need implementations though are not expected to be called.
-        MOCK_CONST_METHOD0(getOutputLayerCount, size_t());
-        MOCK_CONST_METHOD1(getOutputLayerOrderedByZByIndex,
-                           compositionengine::OutputLayer*(size_t));
-        MOCK_METHOD3(ensureOutputLayer,
-                     compositionengine::OutputLayer*(
-                             std::optional<size_t>,
-                             const std::shared_ptr<compositionengine::Layer>&, const sp<LayerFE>&));
-        MOCK_METHOD0(finalizePendingOutputLayers, void());
-        MOCK_METHOD0(clearOutputLayers, void());
-        MOCK_CONST_METHOD1(dumpState, void(std::string&));
-        MOCK_CONST_METHOD0(getCompositionEngine, const CompositionEngine&());
-        MOCK_METHOD2(injectOutputLayerForTest,
-                     compositionengine::OutputLayer*(
-                             const std::shared_ptr<compositionengine::Layer>&, const sp<LayerFE>&));
-        MOCK_METHOD1(injectOutputLayerForTest, void(std::unique_ptr<OutputLayer>));
-
-        impl::OutputCompositionState mState;
     };
 
     GenerateClientCompositionRequestsTest() {
@@ -805,6 +855,7 @@
     EXPECT_CALL(leftOutputLayer, needsFiltering()).WillRepeatedly(Return(false));
     EXPECT_CALL(leftLayer, getFEState()).WillRepeatedly(ReturnRef(leftLayerFEState));
     EXPECT_CALL(leftLayerFE, prepareClientComposition(_)).WillOnce(Return(leftLayerRESettings));
+    EXPECT_CALL(leftOutputLayer, editState()).WillRepeatedly(ReturnRef(leftOutputLayerState));
 
     EXPECT_CALL(rightOutputLayer, getState()).WillRepeatedly(ReturnRef(rightOutputLayerState));
     EXPECT_CALL(rightOutputLayer, getLayer()).WillRepeatedly(ReturnRef(rightLayer));
@@ -813,6 +864,7 @@
     EXPECT_CALL(rightOutputLayer, needsFiltering()).WillRepeatedly(Return(false));
     EXPECT_CALL(rightLayer, getFEState()).WillRepeatedly(ReturnRef(rightLayerFEState));
     EXPECT_CALL(rightLayerFE, prepareClientComposition(_)).WillOnce(Return(rightLayerRESettings));
+    EXPECT_CALL(rightOutputLayer, editState()).WillRepeatedly(ReturnRef(rightOutputLayerState));
 
     EXPECT_CALL(mOutput, getOutputLayerCount()).WillRepeatedly(Return(2u));
     EXPECT_CALL(mOutput, getOutputLayerOrderedByZByIndex(0u))
@@ -865,6 +917,7 @@
     EXPECT_CALL(outputLayer, needsFiltering()).WillRepeatedly(Return(false));
     EXPECT_CALL(layer, getFEState()).WillRepeatedly(ReturnRef(layerFEState));
     EXPECT_CALL(layerFE, prepareClientComposition(_)).Times(0);
+    EXPECT_CALL(outputLayer, editState()).WillRepeatedly(ReturnRef(outputLayerState));
 
     EXPECT_CALL(mOutput, getOutputLayerCount()).WillRepeatedly(Return(1u));
     EXPECT_CALL(mOutput, getOutputLayerOrderedByZByIndex(0u)).WillRepeatedly(Return(&outputLayer));
@@ -930,6 +983,7 @@
     EXPECT_CALL(leftOutputLayer, requiresClientComposition()).WillRepeatedly(Return(false));
     EXPECT_CALL(leftOutputLayer, needsFiltering()).WillRepeatedly(Return(false));
     EXPECT_CALL(leftLayer, getFEState()).WillRepeatedly(ReturnRef(leftLayerFEState));
+    EXPECT_CALL(leftOutputLayer, editState()).WillRepeatedly(ReturnRef(leftOutputLayerState));
 
     EXPECT_CALL(rightOutputLayer, getState()).WillRepeatedly(ReturnRef(rightOutputLayerState));
     EXPECT_CALL(rightOutputLayer, getLayer()).WillRepeatedly(ReturnRef(rightLayer));
@@ -938,6 +992,7 @@
     EXPECT_CALL(rightOutputLayer, needsFiltering()).WillRepeatedly(Return(false));
     EXPECT_CALL(rightLayer, getFEState()).WillRepeatedly(ReturnRef(rightLayerFEState));
     EXPECT_CALL(rightLayerFE, prepareClientComposition(_)).WillOnce(Return(rightLayerRESettings));
+    EXPECT_CALL(rightOutputLayer, editState()).WillRepeatedly(ReturnRef(rightOutputLayerState));
 
     EXPECT_CALL(mOutput, getOutputLayerCount()).WillRepeatedly(Return(2u));
     EXPECT_CALL(mOutput, getOutputLayerOrderedByZByIndex(0u))
diff --git a/services/surfaceflinger/FrameTracer/FrameTracer.cpp b/services/surfaceflinger/FrameTracer/FrameTracer.cpp
index 3a0408e..6f91843 100644
--- a/services/surfaceflinger/FrameTracer/FrameTracer.cpp
+++ b/services/surfaceflinger/FrameTracer/FrameTracer.cpp
@@ -44,52 +44,52 @@
     FrameTracerDataSource::Register(dsd);
 }
 
-void FrameTracer::traceNewLayer(int32_t layerID, const std::string& layerName) {
-    FrameTracerDataSource::Trace([this, layerID, &layerName](FrameTracerDataSource::TraceContext) {
-        if (mTraceTracker.find(layerID) == mTraceTracker.end()) {
+void FrameTracer::traceNewLayer(int32_t layerId, const std::string& layerName) {
+    FrameTracerDataSource::Trace([this, layerId, &layerName](FrameTracerDataSource::TraceContext) {
+        if (mTraceTracker.find(layerId) == mTraceTracker.end()) {
             std::lock_guard<std::mutex> lock(mTraceMutex);
-            mTraceTracker[layerID].layerName = layerName;
+            mTraceTracker[layerId].layerName = layerName;
         }
     });
 }
 
-void FrameTracer::traceTimestamp(int32_t layerID, uint64_t bufferID, uint64_t frameNumber,
+void FrameTracer::traceTimestamp(int32_t layerId, uint64_t bufferID, uint64_t frameNumber,
                                  nsecs_t timestamp, FrameEvent::BufferEventType type,
                                  nsecs_t duration) {
-    FrameTracerDataSource::Trace([this, layerID, bufferID, frameNumber, timestamp, type,
+    FrameTracerDataSource::Trace([this, layerId, bufferID, frameNumber, timestamp, type,
                                   duration](FrameTracerDataSource::TraceContext ctx) {
         std::lock_guard<std::mutex> lock(mTraceMutex);
-        if (mTraceTracker.find(layerID) == mTraceTracker.end()) {
+        if (mTraceTracker.find(layerId) == mTraceTracker.end()) {
             return;
         }
 
         // Handle any pending fences for this buffer.
-        tracePendingFencesLocked(ctx, layerID, bufferID);
+        tracePendingFencesLocked(ctx, layerId, bufferID);
 
         // Complete current trace.
-        traceLocked(ctx, layerID, bufferID, frameNumber, timestamp, type, duration);
+        traceLocked(ctx, layerId, bufferID, frameNumber, timestamp, type, duration);
     });
 }
 
-void FrameTracer::traceFence(int32_t layerID, uint64_t bufferID, uint64_t frameNumber,
+void FrameTracer::traceFence(int32_t layerId, uint64_t bufferID, uint64_t frameNumber,
                              const std::shared_ptr<FenceTime>& fence,
                              FrameEvent::BufferEventType type, nsecs_t startTime) {
-    FrameTracerDataSource::Trace([this, layerID, bufferID, frameNumber, &fence, type,
+    FrameTracerDataSource::Trace([this, layerId, bufferID, frameNumber, &fence, type,
                                   startTime](FrameTracerDataSource::TraceContext ctx) {
         const nsecs_t signalTime = fence->getSignalTime();
         if (signalTime != Fence::SIGNAL_TIME_INVALID) {
             std::lock_guard<std::mutex> lock(mTraceMutex);
-            if (mTraceTracker.find(layerID) == mTraceTracker.end()) {
+            if (mTraceTracker.find(layerId) == mTraceTracker.end()) {
                 return;
             }
 
             // Handle any pending fences for this buffer.
-            tracePendingFencesLocked(ctx, layerID, bufferID);
+            tracePendingFencesLocked(ctx, layerId, bufferID);
 
             if (signalTime != Fence::SIGNAL_TIME_PENDING) {
-                traceSpanLocked(ctx, layerID, bufferID, frameNumber, type, startTime, signalTime);
+                traceSpanLocked(ctx, layerId, bufferID, frameNumber, type, startTime, signalTime);
             } else {
-                mTraceTracker[layerID].pendingFences[bufferID].push_back(
+                mTraceTracker[layerId].pendingFences[bufferID].push_back(
                         {.frameNumber = frameNumber,
                          .type = type,
                          .fence = fence,
@@ -100,9 +100,9 @@
 }
 
 void FrameTracer::tracePendingFencesLocked(FrameTracerDataSource::TraceContext& ctx,
-                                           int32_t layerID, uint64_t bufferID) {
-    if (mTraceTracker[layerID].pendingFences.count(bufferID)) {
-        auto& pendingFences = mTraceTracker[layerID].pendingFences[bufferID];
+                                           int32_t layerId, uint64_t bufferID) {
+    if (mTraceTracker[layerId].pendingFences.count(bufferID)) {
+        auto& pendingFences = mTraceTracker[layerId].pendingFences[bufferID];
         for (size_t i = 0; i < pendingFences.size(); ++i) {
             auto& pendingFence = pendingFences[i];
 
@@ -116,7 +116,7 @@
 
             if (signalTime != Fence::SIGNAL_TIME_INVALID &&
                 systemTime() - signalTime < kFenceSignallingDeadline) {
-                traceSpanLocked(ctx, layerID, bufferID, pendingFence.frameNumber, pendingFence.type,
+                traceSpanLocked(ctx, layerId, bufferID, pendingFence.frameNumber, pendingFence.type,
                                 pendingFence.startTime, signalTime);
             }
 
@@ -126,7 +126,7 @@
     }
 }
 
-void FrameTracer::traceLocked(FrameTracerDataSource::TraceContext& ctx, int32_t layerID,
+void FrameTracer::traceLocked(FrameTracerDataSource::TraceContext& ctx, int32_t layerId,
                               uint64_t bufferID, uint64_t frameNumber, nsecs_t timestamp,
                               FrameEvent::BufferEventType type, nsecs_t duration) {
     auto packet = ctx.NewTracePacket();
@@ -138,9 +138,9 @@
     }
     event->set_type(type);
 
-    if (mTraceTracker.find(layerID) != mTraceTracker.end() &&
-        !mTraceTracker[layerID].layerName.empty()) {
-        const std::string& layerName = mTraceTracker[layerID].layerName;
+    if (mTraceTracker.find(layerId) != mTraceTracker.end() &&
+        !mTraceTracker[layerId].layerName.empty()) {
+        const std::string& layerName = mTraceTracker[layerId].layerName;
         event->set_layer_name(layerName.c_str(), layerName.size());
     }
 
@@ -149,7 +149,7 @@
     }
 }
 
-void FrameTracer::traceSpanLocked(FrameTracerDataSource::TraceContext& ctx, int32_t layerID,
+void FrameTracer::traceSpanLocked(FrameTracerDataSource::TraceContext& ctx, int32_t layerId,
                                   uint64_t bufferID, uint64_t frameNumber,
                                   FrameEvent::BufferEventType type, nsecs_t startTime,
                                   nsecs_t endTime) {
@@ -159,12 +159,12 @@
         timestamp = startTime;
         duration = endTime - startTime;
     }
-    traceLocked(ctx, layerID, bufferID, frameNumber, timestamp, type, duration);
+    traceLocked(ctx, layerId, bufferID, frameNumber, timestamp, type, duration);
 }
 
-void FrameTracer::onDestroy(int32_t layerID) {
+void FrameTracer::onDestroy(int32_t layerId) {
     std::lock_guard<std::mutex> traceLock(mTraceMutex);
-    mTraceTracker.erase(layerID);
+    mTraceTracker.erase(layerId);
 }
 
 std::string FrameTracer::miniDump() {
diff --git a/services/surfaceflinger/FrameTracer/FrameTracer.h b/services/surfaceflinger/FrameTracer/FrameTracer.h
index e91a750..ef5df90 100644
--- a/services/surfaceflinger/FrameTracer/FrameTracer.h
+++ b/services/surfaceflinger/FrameTracer/FrameTracer.h
@@ -47,21 +47,21 @@
     void registerDataSource();
     // Starts tracking a new layer for tracing. Needs to be called once before traceTimestamp() or
     // traceFence() for each layer.
-    void traceNewLayer(int32_t layerID, const std::string& layerName);
+    void traceNewLayer(int32_t layerId, const std::string& layerName);
     // Creates a trace point at the timestamp provided.
-    void traceTimestamp(int32_t layerID, uint64_t bufferID, uint64_t frameNumber, nsecs_t timestamp,
+    void traceTimestamp(int32_t layerId, uint64_t bufferID, uint64_t frameNumber, nsecs_t timestamp,
                         FrameEvent::BufferEventType type, nsecs_t duration = 0);
     // Creates a trace point after the provided fence has been signalled. If a startTime is provided
     // the trace will have be timestamped from startTime until fence signalling time. If no
     // startTime is provided, a durationless trace point will be created timestamped at fence
     // signalling time. If the fence hasn't signalled yet, the trace point will be created the next
     // time after signalling a trace call for this buffer occurs.
-    void traceFence(int32_t layerID, uint64_t bufferID, uint64_t frameNumber,
+    void traceFence(int32_t layerId, uint64_t bufferID, uint64_t frameNumber,
                     const std::shared_ptr<FenceTime>& fence, FrameEvent::BufferEventType type,
                     nsecs_t startTime = 0);
 
     // Takes care of cleanup when a layer is destroyed.
-    void onDestroy(int32_t layerID);
+    void onDestroy(int32_t layerId);
 
     std::string miniDump();
 
@@ -88,15 +88,15 @@
 
     // Checks if any pending fences for a layer and buffer have signalled and, if they have, creates
     // trace points for them.
-    void tracePendingFencesLocked(FrameTracerDataSource::TraceContext& ctx, int32_t layerID,
+    void tracePendingFencesLocked(FrameTracerDataSource::TraceContext& ctx, int32_t layerId,
                                   uint64_t bufferID);
     // Creates a trace point by translating a start time and an end time to a timestamp and
     // duration. If startTime is later than end time it sets end time as the timestamp and the
     // duration to 0. Used by traceFence().
-    void traceSpanLocked(FrameTracerDataSource::TraceContext& ctx, int32_t layerID,
+    void traceSpanLocked(FrameTracerDataSource::TraceContext& ctx, int32_t layerId,
                          uint64_t bufferID, uint64_t frameNumber, FrameEvent::BufferEventType type,
                          nsecs_t startTime, nsecs_t endTime);
-    void traceLocked(FrameTracerDataSource::TraceContext& ctx, int32_t layerID, uint64_t bufferID,
+    void traceLocked(FrameTracerDataSource::TraceContext& ctx, int32_t layerId, uint64_t bufferID,
                      uint64_t frameNumber, nsecs_t timestamp, FrameEvent::BufferEventType type,
                      nsecs_t duration = 0);
 
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 00d932d..ce9aab5 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -109,6 +109,7 @@
     mCurrentState.hasColorTransform = false;
     mCurrentState.colorSpaceAgnostic = false;
     mCurrentState.metadata = args.metadata;
+    mCurrentState.shadowRadius = 0.f;
 
     // drawing state & current state are identical
     mDrawingState = mCurrentState;
@@ -1359,9 +1360,9 @@
 void Layer::onDisconnect() {
     Mutex::Autolock lock(mFrameEventHistoryMutex);
     mFrameEventHistory.onDisconnect();
-    const int32_t layerID = getSequence();
-    mFlinger->mTimeStats->onDestroy(layerID);
-    mFlinger->mFrameTracer->onDestroy(layerID);
+    const int32_t layerId = getSequence();
+    mFlinger->mTimeStats->onDestroy(layerId);
+    mFlinger->mFrameTracer->onDestroy(layerId);
 }
 
 void Layer::addAndGetFrameTimestamps(const NewFrameEventsEntry* newTimestamps,
@@ -1369,6 +1370,8 @@
     if (newTimestamps) {
         mFlinger->mTimeStats->setPostTime(getSequence(), newTimestamps->frameNumber,
                                           getName().c_str(), newTimestamps->postedTime);
+        mFlinger->mTimeStats->setAcquireFence(getSequence(), newTimestamps->frameNumber,
+                                              newTimestamps->acquireFence);
     }
 
     Mutex::Autolock lock(mFrameEventHistoryMutex);
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index bed5ad3..286311b 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -531,7 +531,7 @@
      * called after composition.
      * returns true if the layer latched a new buffer this frame.
      */
-    virtual bool onPostComposition(const std::optional<DisplayId>& /*displayId*/,
+    virtual bool onPostComposition(sp<const DisplayDevice> /*displayDevice*/,
                                    const std::shared_ptr<FenceTime>& /*glDoneFence*/,
                                    const std::shared_ptr<FenceTime>& /*presentFence*/,
                                    const CompositorTiming& /*compositorTiming*/) {
@@ -601,6 +601,8 @@
 
     virtual sp<GraphicBuffer> getBuffer() const { return nullptr; }
 
+    virtual uint64_t getCurrentFrameNumber() const { return mCurrentFrameNumber; }
+
     /*
      * Returns if a frame is ready
      */
@@ -950,7 +952,7 @@
     // The inherited shadow radius after taking into account the layer hierarchy. This is the
     // final shadow radius for this layer. If a shadow is specified for a layer, then effective
     // shadow radius is the set shadow radius, otherwise its the parent's shadow radius.
-    float mEffectiveShadowRadius;
+    float mEffectiveShadowRadius = 0.f;
 
     // Returns true if the layer can draw shadows on its border.
     virtual bool canDrawShadows() const { return true; }
diff --git a/services/surfaceflinger/Scheduler/LayerHistory.h b/services/surfaceflinger/Scheduler/LayerHistory.h
index 15ac8ca..bd9aca1 100644
--- a/services/surfaceflinger/Scheduler/LayerHistory.h
+++ b/services/surfaceflinger/Scheduler/LayerHistory.h
@@ -28,6 +28,7 @@
 namespace android {
 
 class Layer;
+class TestableScheduler;
 
 namespace scheduler {
 
@@ -59,6 +60,7 @@
 
 private:
     friend class LayerHistoryTest;
+    friend TestableScheduler;
 
     using LayerPair = std::pair<wp<Layer>, std::unique_ptr<LayerInfo>>;
     using LayerInfos = std::vector<LayerPair>;
diff --git a/services/surfaceflinger/Scheduler/LayerInfo.cpp b/services/surfaceflinger/Scheduler/LayerInfo.cpp
index f3b0d56..6d9dd43 100644
--- a/services/surfaceflinger/Scheduler/LayerInfo.cpp
+++ b/services/surfaceflinger/Scheduler/LayerInfo.cpp
@@ -25,6 +25,8 @@
       : mLowRefreshRate(lowRefreshRate), mHighRefreshRate(highRefreshRate) {}
 
 void LayerInfo::setLastPresentTime(nsecs_t lastPresentTime, nsecs_t now) {
+    lastPresentTime = std::max(lastPresentTime, static_cast<nsecs_t>(0));
+
     // Buffers can come with a present time far in the future. That keeps them relevant.
     mLastUpdatedTime = std::max(lastPresentTime, now);
     mPresentTimeHistory.insertPresentTime(mLastUpdatedTime);
diff --git a/services/surfaceflinger/Scheduler/OneShotTimer.cpp b/services/surfaceflinger/Scheduler/OneShotTimer.cpp
index 4870a3b..a90d05e 100644
--- a/services/surfaceflinger/Scheduler/OneShotTimer.cpp
+++ b/services/surfaceflinger/Scheduler/OneShotTimer.cpp
@@ -17,6 +17,7 @@
 #include "OneShotTimer.h"
 
 #include <chrono>
+#include <sstream>
 #include <thread>
 
 namespace android {
@@ -98,7 +99,7 @@
             mTimeoutCallback();
         }
     }
-} // namespace scheduler
+}
 
 void OneShotTimer::reset() {
     {
@@ -108,5 +109,11 @@
     mCondition.notify_all();
 }
 
+std::string OneShotTimer::dump() const {
+    std::ostringstream stream;
+    stream << mInterval.count() << " ms";
+    return stream.str();
+}
+
 } // namespace scheduler
 } // namespace android
diff --git a/services/surfaceflinger/Scheduler/OneShotTimer.h b/services/surfaceflinger/Scheduler/OneShotTimer.h
index 921631e..b005754 100644
--- a/services/surfaceflinger/Scheduler/OneShotTimer.h
+++ b/services/surfaceflinger/Scheduler/OneShotTimer.h
@@ -39,8 +39,6 @@
                  const TimeoutCallback& timeoutCallback);
     ~OneShotTimer();
 
-    const Interval& interval() const { return mInterval; }
-
     // Initializes and turns on the idle timer.
     void start();
     // Stops the idle timer and any held resources.
@@ -48,6 +46,8 @@
     // Resets the wakeup time and fires the reset callback.
     void reset();
 
+    std::string dump() const;
+
 private:
     // Enum to track in what state is the timer.
     enum class TimerState {
diff --git a/services/surfaceflinger/Scheduler/Scheduler.cpp b/services/surfaceflinger/Scheduler/Scheduler.cpp
index 71b3500..55fd603 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.cpp
+++ b/services/surfaceflinger/Scheduler/Scheduler.cpp
@@ -20,6 +20,7 @@
 
 #include "Scheduler.h"
 
+#include <android-base/stringprintf.h>
 #include <android/hardware/configstore/1.0/ISurfaceFlingerConfigs.h>
 #include <android/hardware/configstore/1.1/ISurfaceFlingerConfigs.h>
 #include <configstore/Utils.h>
@@ -66,9 +67,11 @@
         mRefreshRateConfigs(refreshRateConfig) {
     using namespace sysprop;
 
-    char value[PROPERTY_VALUE_MAX];
-    property_get("debug.sf.set_idle_timer_ms", value, "0");
-    const int setIdleTimerMs = atoi(value);
+    if (property_get_bool("debug.sf.use_smart_90_for_video", 0) || use_smart_90_for_video(false)) {
+        mLayerHistory.emplace();
+    }
+
+    const int setIdleTimerMs = property_get_int32("debug.sf.set_idle_timer_ms", 0);
 
     if (const auto millis = setIdleTimerMs ? setIdleTimerMs : set_idle_timer_ms(0); millis > 0) {
         const auto callback = mSupportKernelTimer ? &Scheduler::kernelIdleTimerCallback
@@ -327,26 +330,28 @@
 }
 
 void Scheduler::registerLayer(Layer* layer) {
-    uint32_t defaultFps, performanceFps;
-    if (mRefreshRateConfigs.refreshRateSwitchingSupported()) {
-        defaultFps = mRefreshRateConfigs.getRefreshRateFromType(RefreshRateType::DEFAULT).fps;
-        const auto type = layer->getWindowType() == InputWindowInfo::TYPE_WALLPAPER
-                ? RefreshRateType::DEFAULT
-                : RefreshRateType::PERFORMANCE;
-        performanceFps = mRefreshRateConfigs.getRefreshRateFromType(type).fps;
-    } else {
-        defaultFps = mRefreshRateConfigs.getCurrentRefreshRate().second.fps;
-        performanceFps = defaultFps;
-    }
-    mLayerHistory.registerLayer(layer, defaultFps, performanceFps);
+    if (!mLayerHistory) return;
+
+    const auto type = layer->getWindowType() == InputWindowInfo::TYPE_WALLPAPER
+            ? RefreshRateType::DEFAULT
+            : RefreshRateType::PERFORMANCE;
+
+    const auto lowFps = mRefreshRateConfigs.getRefreshRateFromType(RefreshRateType::DEFAULT).fps;
+    const auto highFps = mRefreshRateConfigs.getRefreshRateFromType(type).fps;
+
+    mLayerHistory->registerLayer(layer, lowFps, highFps);
 }
 
 void Scheduler::recordLayerHistory(Layer* layer, nsecs_t presentTime, bool isHDR) {
-    mLayerHistory.record(layer, presentTime, isHDR, systemTime());
+    if (mLayerHistory) {
+        mLayerHistory->record(layer, presentTime, isHDR, systemTime());
+    }
 }
 
-void Scheduler::updateFpsBasedOnContent() {
-    auto [refreshRate, isHDR] = mLayerHistory.summarize(systemTime());
+void Scheduler::chooseRefreshRateForContent() {
+    if (!mLayerHistory) return;
+
+    auto [refreshRate, isHDR] = mLayerHistory->summarize(systemTime());
     const uint32_t refreshRateRound = std::round(refreshRate);
     RefreshRateType newRefreshRateType;
     {
@@ -393,7 +398,9 @@
 
     // Touch event will boost the refresh rate to performance.
     // Clear Layer History to get fresh FPS detection
-    mLayerHistory.clear();
+    if (mLayerHistory) {
+        mLayerHistory->clear();
+    }
 }
 
 void Scheduler::setDisplayPowerState(bool normal) {
@@ -408,7 +415,9 @@
 
     // Display Power event will boost the refresh rate to performance.
     // Clear Layer History to get fresh FPS detection
-    mLayerHistory.clear();
+    if (mLayerHistory) {
+        mLayerHistory->clear();
+    }
 }
 
 void Scheduler::kernelIdleTimerCallback(TimerState state) {
@@ -446,15 +455,17 @@
 }
 
 void Scheduler::dump(std::string& result) const {
-    std::ostringstream stream;
-    if (mIdleTimer) {
-        stream << "+  Idle timer interval: " << mIdleTimer->interval().count() << " ms\n";
-    }
-    if (mTouchTimer) {
-        stream << "+  Touch timer interval: " << mTouchTimer->interval().count() << " ms\n";
-    }
+    using base::StringAppendF;
+    const char* const states[] = {"off", "on"};
 
-    result.append(stream.str());
+    const bool supported = mRefreshRateConfigs.refreshRateSwitchingSupported();
+    StringAppendF(&result, "+  Refresh rate switching: %s\n", states[supported]);
+    StringAppendF(&result, "+  Content detection: %s\n", states[mLayerHistory.has_value()]);
+
+    StringAppendF(&result, "+  Idle timer: %s\n",
+                  mIdleTimer ? mIdleTimer->dump().c_str() : states[0]);
+    StringAppendF(&result, "+  Touch timer: %s\n\n",
+                  mTouchTimer ? mTouchTimer->dump().c_str() : states[0]);
 }
 
 template <class T>
diff --git a/services/surfaceflinger/Scheduler/Scheduler.h b/services/surfaceflinger/Scheduler/Scheduler.h
index c983475..346896c 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.h
+++ b/services/surfaceflinger/Scheduler/Scheduler.h
@@ -105,8 +105,8 @@
     void registerLayer(Layer*);
     void recordLayerHistory(Layer*, nsecs_t presentTime, bool isHDR);
 
-    // Updates FPS based on the most content presented.
-    void updateFpsBasedOnContent();
+    // Detects content using layer history, and selects a matching refresh rate.
+    void chooseRefreshRateForContent();
 
     // Called by Scheduler to change refresh rate.
     void setChangeRefreshRateCallback(ChangeRefreshRateCallback&&);
@@ -184,8 +184,8 @@
     std::unique_ptr<DispSync> mPrimaryDispSync;
     std::unique_ptr<EventControlThread> mEventControlThread;
 
-    // Historical information about individual layers. Used for predicting the refresh rate.
-    scheduler::LayerHistory mLayerHistory;
+    // Used to choose refresh rate if content detection is enabled.
+    std::optional<scheduler::LayerHistory> mLayerHistory;
 
     // Whether to use idle timer callbacks that support the kernel timer.
     const bool mSupportKernelTimer;
diff --git a/services/surfaceflinger/Scheduler/Timer.cpp b/services/surfaceflinger/Scheduler/Timer.cpp
new file mode 100644
index 0000000..2394ed2
--- /dev/null
+++ b/services/surfaceflinger/Scheduler/Timer.cpp
@@ -0,0 +1,181 @@
+/*
+ * Copyright 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#undef LOG_TAG
+#define LOG_TAG "SchedulerTimer"
+#define ATRACE_TAG ATRACE_TAG_GRAPHICS
+#include <log/log.h>
+#include <sys/epoll.h>
+#include <sys/timerfd.h>
+#include <sys/unistd.h>
+#include <utils/Trace.h>
+#include <chrono>
+#include <cstdint>
+
+#include "Timer.h"
+
+namespace android::scheduler {
+
+static constexpr size_t kReadPipe = 0;
+static constexpr size_t kWritePipe = 1;
+
+template <class T, size_t N>
+constexpr size_t arrayLen(T (&)[N]) {
+    return N;
+}
+
+Timer::Timer()
+      : mTimerFd(timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC | TFD_NONBLOCK)),
+        mEpollFd(epoll_create1(EPOLL_CLOEXEC)) {
+    if (pipe2(mPipes.data(), O_CLOEXEC | O_NONBLOCK)) {
+        ALOGE("could not create TimerDispatch mPipes");
+    };
+
+    mDispatchThread = std::thread(std::bind(&Timer::dispatch, this));
+}
+
+Timer::~Timer() {
+    endDispatch();
+    mDispatchThread.join();
+
+    close(mPipes[kWritePipe]);
+    close(mPipes[kReadPipe]);
+    close(mEpollFd);
+    close(mTimerFd);
+}
+
+void Timer::endDispatch() {
+    static constexpr unsigned char end = 'e';
+    write(mPipes[kWritePipe], &end, sizeof(end));
+}
+
+nsecs_t Timer::now() const {
+    return systemTime(SYSTEM_TIME_MONOTONIC);
+}
+
+constexpr char const* timerTraceTag = "AlarmInNs";
+void Timer::alarmIn(std::function<void()> const& cb, nsecs_t fireIn) {
+    std::lock_guard<decltype(mMutex)> lk(mMutex);
+    ATRACE_INT64(timerTraceTag, fireIn);
+
+    using namespace std::literals;
+    static constexpr int ns_per_s =
+            std::chrono::duration_cast<std::chrono::nanoseconds>(1s).count();
+
+    mCallback = cb;
+
+    struct itimerspec old_timer;
+    struct itimerspec new_timer {
+        .it_interval = {.tv_sec = 0, .tv_nsec = 0},
+        .it_value = {.tv_sec = static_cast<long>(fireIn / ns_per_s),
+                     .tv_nsec = static_cast<long>(fireIn % ns_per_s)},
+    };
+
+    if (timerfd_settime(mTimerFd, 0, &new_timer, &old_timer)) {
+        ALOGW("Failed to set timerfd");
+    }
+}
+
+void Timer::alarmCancel() {
+    std::lock_guard<decltype(mMutex)> lk(mMutex);
+    ATRACE_INT64(timerTraceTag, 0);
+
+    struct itimerspec old_timer;
+    struct itimerspec new_timer {
+        .it_interval = {.tv_sec = 0, .tv_nsec = 0},
+        .it_value = {
+                .tv_sec = 0,
+                .tv_nsec = 0,
+        },
+    };
+
+    if (timerfd_settime(mTimerFd, 0, &new_timer, &old_timer)) {
+        ALOGW("Failed to disarm timerfd");
+    }
+}
+
+void Timer::dispatch() {
+    struct sched_param param = {0};
+    param.sched_priority = 2;
+    if (pthread_setschedparam(pthread_self(), SCHED_FIFO, &param) != 0) {
+        ALOGW("Failed to set SCHED_FIFO on dispatch thread");
+    }
+
+    if (pthread_setname_np(pthread_self(), "TimerDispatch")) {
+        ALOGW("Failed to set thread name on dispatch thread");
+    }
+
+    enum DispatchType : uint32_t { TIMER, TERMINATE, MAX_DISPATCH_TYPE };
+    epoll_event timerEvent;
+    timerEvent.events = EPOLLIN;
+    timerEvent.data.u32 = DispatchType::TIMER;
+    if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mTimerFd, &timerEvent) == -1) {
+        ALOGE("Error adding timer fd to epoll dispatch loop");
+        return;
+    }
+
+    epoll_event terminateEvent;
+    terminateEvent.events = EPOLLIN;
+    terminateEvent.data.u32 = DispatchType::TERMINATE;
+    if (epoll_ctl(mEpollFd, EPOLL_CTL_ADD, mPipes[kReadPipe], &terminateEvent) == -1) {
+        ALOGE("Error adding control fd to dispatch loop");
+        return;
+    }
+
+    uint64_t iteration = 0;
+    char const traceNamePrefix[] = "TimerIteration #";
+    static constexpr size_t max64print = std::numeric_limits<decltype(iteration)>::digits10;
+    static constexpr size_t maxlen = arrayLen(traceNamePrefix) + max64print;
+    std::array<char, maxlen> str_buffer;
+    auto timing = true;
+    while (timing) {
+        epoll_event events[DispatchType::MAX_DISPATCH_TYPE];
+        int nfds = epoll_wait(mEpollFd, events, DispatchType::MAX_DISPATCH_TYPE, -1);
+
+        if (ATRACE_ENABLED()) {
+            snprintf(str_buffer.data(), str_buffer.size(), "%s%" PRIu64, traceNamePrefix,
+                     iteration++);
+            ATRACE_NAME(str_buffer.data());
+        }
+
+        if (nfds == -1) {
+            if (errno != EINTR) {
+                timing = false;
+                continue;
+            }
+        }
+
+        for (auto i = 0; i < nfds; i++) {
+            if (events[i].data.u32 == DispatchType::TIMER) {
+                static uint64_t mIgnored = 0;
+                read(mTimerFd, &mIgnored, sizeof(mIgnored));
+                std::function<void()> cb;
+                {
+                    std::lock_guard<decltype(mMutex)> lk(mMutex);
+                    cb = mCallback;
+                }
+                if (cb) {
+                    cb();
+                }
+            }
+            if (events[i].data.u32 == DispatchType::TERMINATE) {
+                timing = false;
+            }
+        }
+    }
+}
+
+} // namespace android::scheduler
diff --git a/services/surfaceflinger/Scheduler/Timer.h b/services/surfaceflinger/Scheduler/Timer.h
new file mode 100644
index 0000000..0ae82c8
--- /dev/null
+++ b/services/surfaceflinger/Scheduler/Timer.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "TimeKeeper.h"
+
+#include <android-base/thread_annotations.h>
+#include <array>
+#include <thread>
+
+namespace android::scheduler {
+
+class Timer : public TimeKeeper {
+public:
+    Timer();
+    ~Timer();
+    nsecs_t now() const final;
+
+    // NB: alarmIn and alarmCancel are threadsafe; with the last-returning function being effectual
+    //     Most users will want to serialize thes calls so as to be aware of the timer state.
+    void alarmIn(std::function<void()> const& cb, nsecs_t fireIn) final;
+    void alarmCancel() final;
+
+private:
+    int const mTimerFd;
+    int const mEpollFd;
+    std::array<int, 2> mPipes;
+
+    std::thread mDispatchThread;
+    void dispatch();
+    void endDispatch();
+
+    std::mutex mMutex;
+    std::function<void()> mCallback GUARDED_BY(mMutex);
+};
+
+} // namespace android::scheduler
diff --git a/services/surfaceflinger/Scheduler/VSyncPredictor.cpp b/services/surfaceflinger/Scheduler/VSyncPredictor.cpp
new file mode 100644
index 0000000..643c5d2
--- /dev/null
+++ b/services/surfaceflinger/Scheduler/VSyncPredictor.cpp
@@ -0,0 +1,208 @@
+/*
+ * Copyright 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define ATRACE_TAG ATRACE_TAG_GRAPHICS
+//#define LOG_NDEBUG 0
+#include "VSyncPredictor.h"
+#include <android-base/logging.h>
+#include <cutils/compiler.h>
+#include <utils/Log.h>
+#include <utils/Trace.h>
+#include <algorithm>
+#include <chrono>
+#include "SchedulerUtils.h"
+
+namespace android::scheduler {
+static auto constexpr kNeedsSamplesTag = "SamplesRequested";
+static auto constexpr kMaxPercent = 100u;
+
+VSyncPredictor::~VSyncPredictor() = default;
+
+VSyncPredictor::VSyncPredictor(nsecs_t idealPeriod, size_t historySize,
+                               size_t minimumSamplesForPrediction, uint32_t outlierTolerancePercent)
+      : kHistorySize(historySize),
+        kMinimumSamplesForPrediction(minimumSamplesForPrediction),
+        kOutlierTolerancePercent(std::min(outlierTolerancePercent, kMaxPercent)),
+        mIdealPeriod(idealPeriod) {
+    mRateMap[mIdealPeriod] = {idealPeriod, 0};
+}
+
+inline size_t VSyncPredictor::next(int i) const {
+    return (i + 1) % timestamps.size();
+}
+
+bool VSyncPredictor::validate(nsecs_t timestamp) const {
+    if (lastTimestampIndex < 0 || timestamps.empty()) {
+        return true;
+    }
+
+    auto const aValidTimestamp = timestamps[lastTimestampIndex];
+    auto const percent = (timestamp - aValidTimestamp) % mIdealPeriod * kMaxPercent / mIdealPeriod;
+    return percent < kOutlierTolerancePercent || percent > (kMaxPercent - kOutlierTolerancePercent);
+}
+
+void VSyncPredictor::addVsyncTimestamp(nsecs_t timestamp) {
+    std::lock_guard<std::mutex> lk(mMutex);
+
+    if (!validate(timestamp)) {
+        ALOGW("timestamp was too far off the last known timestamp");
+        return;
+    }
+
+    if (timestamps.size() != kHistorySize) {
+        timestamps.push_back(timestamp);
+        lastTimestampIndex = next(lastTimestampIndex);
+    } else {
+        lastTimestampIndex = next(lastTimestampIndex);
+        timestamps[lastTimestampIndex] = timestamp;
+    }
+
+    if (timestamps.size() < kMinimumSamplesForPrediction) {
+        mRateMap[mIdealPeriod] = {mIdealPeriod, 0};
+        return;
+    }
+
+    // This is a 'simple linear regression' calculation of Y over X, with Y being the
+    // vsync timestamps, and X being the ordinal of vsync count.
+    // The calculated slope is the vsync period.
+    // Formula for reference:
+    // Sigma_i: means sum over all timestamps.
+    // mean(variable): statistical mean of variable.
+    // X: snapped ordinal of the timestamp
+    // Y: vsync timestamp
+    //
+    //         Sigma_i( (X_i - mean(X)) * (Y_i - mean(Y) )
+    // slope = -------------------------------------------
+    //         Sigma_i ( X_i - mean(X) ) ^ 2
+    //
+    // intercept = mean(Y) - slope * mean(X)
+    //
+    std::vector<nsecs_t> vsyncTS(timestamps.size());
+    std::vector<nsecs_t> ordinals(timestamps.size());
+
+    // normalizing to the oldest timestamp cuts down on error in calculating the intercept.
+    auto const oldest_ts = *std::min_element(timestamps.begin(), timestamps.end());
+    auto it = mRateMap.find(mIdealPeriod);
+    auto const currentPeriod = std::get<0>(it->second);
+    // TODO (b/144707443): its important that there's some precision in the mean of the ordinals
+    //                     for the intercept calculation, so scale the ordinals by 10 to continue
+    //                     fixed point calculation. Explore expanding
+    //                     scheduler::utils::calculate_mean to have a fixed point fractional part.
+    static constexpr int kScalingFactor = 10;
+
+    for (auto i = 0u; i < timestamps.size(); i++) {
+        vsyncTS[i] = timestamps[i] - oldest_ts;
+        ordinals[i] = ((vsyncTS[i] + (currentPeriod / 2)) / currentPeriod) * kScalingFactor;
+    }
+
+    auto meanTS = scheduler::calculate_mean(vsyncTS);
+    auto meanOrdinal = scheduler::calculate_mean(ordinals);
+    for (auto i = 0; i < vsyncTS.size(); i++) {
+        vsyncTS[i] -= meanTS;
+        ordinals[i] -= meanOrdinal;
+    }
+
+    auto top = 0ll;
+    auto bottom = 0ll;
+    for (auto i = 0; i < vsyncTS.size(); i++) {
+        top += vsyncTS[i] * ordinals[i];
+        bottom += ordinals[i] * ordinals[i];
+    }
+
+    if (CC_UNLIKELY(bottom == 0)) {
+        it->second = {mIdealPeriod, 0};
+        return;
+    }
+
+    nsecs_t const anticipatedPeriod = top / bottom * kScalingFactor;
+    nsecs_t const intercept = meanTS - (anticipatedPeriod * meanOrdinal / kScalingFactor);
+
+    it->second = {anticipatedPeriod, intercept};
+
+    ALOGV("model update ts: %" PRId64 " slope: %" PRId64 " intercept: %" PRId64, timestamp,
+          anticipatedPeriod, intercept);
+}
+
+nsecs_t VSyncPredictor::nextAnticipatedVSyncTimeFrom(nsecs_t timePoint) const {
+    std::lock_guard<std::mutex> lk(mMutex);
+
+    auto const [slope, intercept] = getVSyncPredictionModel(lk);
+
+    if (timestamps.empty()) {
+        auto const knownTimestamp = mKnownTimestamp ? *mKnownTimestamp : timePoint;
+        auto const numPeriodsOut = ((timePoint - knownTimestamp) / mIdealPeriod) + 1;
+        return knownTimestamp + numPeriodsOut * mIdealPeriod;
+    }
+
+    auto const oldest = *std::min_element(timestamps.begin(), timestamps.end());
+    auto const ordinalRequest = (timePoint - oldest + slope) / slope;
+    auto const prediction = (ordinalRequest * slope) + intercept + oldest;
+
+    ALOGV("prediction made from: %" PRId64 " prediction: %" PRId64 " (+%" PRId64 ") slope: %" PRId64
+          " intercept: %" PRId64,
+          timePoint, prediction, prediction - timePoint, slope, intercept);
+    return prediction;
+}
+
+std::tuple<nsecs_t, nsecs_t> VSyncPredictor::getVSyncPredictionModel() const {
+    std::lock_guard<std::mutex> lk(mMutex);
+    return VSyncPredictor::getVSyncPredictionModel(lk);
+}
+
+std::tuple<nsecs_t, nsecs_t> VSyncPredictor::getVSyncPredictionModel(
+        std::lock_guard<std::mutex> const&) const {
+    return mRateMap.find(mIdealPeriod)->second;
+}
+
+void VSyncPredictor::setPeriod(nsecs_t period) {
+    ATRACE_CALL();
+
+    std::lock_guard<std::mutex> lk(mMutex);
+    static constexpr size_t kSizeLimit = 30;
+    if (CC_UNLIKELY(mRateMap.size() == kSizeLimit)) {
+        mRateMap.erase(mRateMap.begin());
+    }
+
+    mIdealPeriod = period;
+    if (mRateMap.find(period) == mRateMap.end()) {
+        mRateMap[mIdealPeriod] = {period, 0};
+    }
+
+    if (!timestamps.empty()) {
+        mKnownTimestamp = *std::max_element(timestamps.begin(), timestamps.end());
+        timestamps.clear();
+        lastTimestampIndex = 0;
+    }
+}
+
+bool VSyncPredictor::needsMoreSamples(nsecs_t now) const {
+    using namespace std::literals::chrono_literals;
+    std::lock_guard<std::mutex> lk(mMutex);
+    bool needsMoreSamples = true;
+    if (timestamps.size() >= kMinimumSamplesForPrediction) {
+        nsecs_t constexpr aLongTime =
+                std::chrono::duration_cast<std::chrono::nanoseconds>(500ms).count();
+        if (!(lastTimestampIndex < 0 || timestamps.empty())) {
+            auto const lastTimestamp = timestamps[lastTimestampIndex];
+            needsMoreSamples = !((lastTimestamp + aLongTime) > now);
+        }
+    }
+
+    ATRACE_INT(kNeedsSamplesTag, needsMoreSamples);
+    return needsMoreSamples;
+}
+
+} // namespace android::scheduler
diff --git a/services/surfaceflinger/Scheduler/VSyncPredictor.h b/services/surfaceflinger/Scheduler/VSyncPredictor.h
new file mode 100644
index 0000000..1590f49
--- /dev/null
+++ b/services/surfaceflinger/Scheduler/VSyncPredictor.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <android-base/thread_annotations.h>
+#include <mutex>
+#include <unordered_map>
+#include <vector>
+#include "VSyncTracker.h"
+
+namespace android::scheduler {
+
+class VSyncPredictor : public VSyncTracker {
+public:
+    /*
+     * \param [in] idealPeriod  The initial ideal period to use.
+     * \param [in] historySize  The internal amount of entries to store in the model.
+     * \param [in] minimumSamplesForPrediction The minimum number of samples to collect before
+     * predicting. \param [in] outlierTolerancePercent a number 0 to 100 that will be used to filter
+     * samples that fall outlierTolerancePercent from an anticipated vsync event.
+     */
+    VSyncPredictor(nsecs_t idealPeriod, size_t historySize, size_t minimumSamplesForPrediction,
+                   uint32_t outlierTolerancePercent);
+    ~VSyncPredictor();
+
+    void addVsyncTimestamp(nsecs_t timestamp) final;
+    nsecs_t nextAnticipatedVSyncTimeFrom(nsecs_t timePoint) const final;
+
+    /*
+     * Inform the model that the period is anticipated to change to a new value.
+     * model will use the period parameter to predict vsync events until enough
+     * timestamps with the new period have been collected.
+     *
+     * \param [in] period   The new period that should be used.
+     */
+    void setPeriod(nsecs_t period);
+
+    /* Query if the model is in need of more samples to make a prediction at timePoint.
+     * \param [in] timePoint    The timePoint to inquire of.
+     * \return  True, if model would benefit from more samples, False if not.
+     */
+    bool needsMoreSamples(nsecs_t timePoint) const;
+
+    std::tuple<nsecs_t /* slope */, nsecs_t /* intercept */> getVSyncPredictionModel() const;
+
+private:
+    VSyncPredictor(VSyncPredictor const&) = delete;
+    VSyncPredictor& operator=(VSyncPredictor const&) = delete;
+
+    size_t const kHistorySize;
+    size_t const kMinimumSamplesForPrediction;
+    size_t const kOutlierTolerancePercent;
+
+    std::mutex mutable mMutex;
+    size_t next(int i) const REQUIRES(mMutex);
+    bool validate(nsecs_t timestamp) const REQUIRES(mMutex);
+    std::tuple<nsecs_t, nsecs_t> getVSyncPredictionModel(std::lock_guard<std::mutex> const&) const
+            REQUIRES(mMutex);
+
+    nsecs_t mIdealPeriod GUARDED_BY(mMutex);
+    std::optional<nsecs_t> mKnownTimestamp GUARDED_BY(mMutex);
+
+    std::unordered_map<nsecs_t, std::tuple<nsecs_t, nsecs_t>> mutable mRateMap GUARDED_BY(mMutex);
+
+    int lastTimestampIndex GUARDED_BY(mMutex) = 0;
+    std::vector<nsecs_t> timestamps GUARDED_BY(mMutex);
+};
+
+} // namespace android::scheduler
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 01daa3e..14a2ab1 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -356,14 +356,6 @@
     auto listSize = property_get_int32("debug.sf.max_igbp_list_size", int32_t(defaultListSize));
     mMaxGraphicBufferProducerListSize = (listSize > 0) ? size_t(listSize) : defaultListSize;
 
-    mUseSmart90ForVideo = use_smart_90_for_video(false);
-    property_get("debug.sf.use_smart_90_for_video", value, "0");
-
-    int int_value = atoi(value);
-    if (int_value) {
-        mUseSmart90ForVideo = true;
-    }
-
     property_get("debug.sf.luma_sampling", value, "1");
     mLumaSampling = atoi(value);
 
@@ -1643,11 +1635,7 @@
                 mGpuFrameMissedCount++;
             }
 
-            if (mUseSmart90ForVideo) {
-                // This call is made each time SF wakes up and creates a new frame. It is part
-                // of video detection feature.
-                mScheduler->updateFpsBasedOnContent();
-            }
+            mScheduler->chooseRefreshRateForContent();
 
             if (performSetActiveConfig()) {
                 break;
@@ -1727,7 +1715,12 @@
     refreshArgs.layersWithQueuedFrames.reserve(mLayersWithQueuedFrames.size());
     for (sp<Layer> layer : mLayersWithQueuedFrames) {
         auto compositionLayer = layer->getCompositionLayer();
-        if (compositionLayer) refreshArgs.layersWithQueuedFrames.push_back(compositionLayer.get());
+        if (compositionLayer) {
+            refreshArgs.layersWithQueuedFrames.push_back(compositionLayer.get());
+            mFrameTracer->traceTimestamp(layer->getSequence(), layer->getCurrentBufferId(),
+                                         layer->getCurrentFrameNumber(), systemTime(),
+                                         FrameTracer::FrameEvent::HWC_COMPOSITION_QUEUED);
+        }
     }
 
     refreshArgs.repaintEverything = mRepaintEverything.exchange(false);
@@ -1908,9 +1901,8 @@
     }
 
     mDrawingState.traverseInZOrder([&](Layer* layer) {
-        bool frameLatched =
-                layer->onPostComposition(displayDevice->getId(), glCompositionDoneFenceTime,
-                                         presentFenceTime, compositorTiming);
+        bool frameLatched = layer->onPostComposition(displayDevice, glCompositionDoneFenceTime,
+                                                     presentFenceTime, compositorTiming);
         if (frameLatched) {
             recordBufferingStats(layer->getName(), layer->getOccupancyHistory(false));
         }
@@ -3726,6 +3718,8 @@
 
     if (currentMode == HWC_POWER_MODE_OFF) {
         // Turn on the display
+        // TODO: @vhau temp fix only!  See b/141111965
+        mTransactionCompletedThread.clearAllPending();
         getHwComposer().setPowerMode(*displayId, mode);
         if (display->isPrimary() && mode != HWC_POWER_MODE_DOZE_SUSPEND) {
             setVsyncEnabledInHWC(*displayId, mHWCVsyncPendingState);
@@ -3947,9 +3941,6 @@
 
 void SurfaceFlinger::dumpVSync(std::string& result) const {
     mScheduler->dump(result);
-    StringAppendF(&result, "+  Refresh rate switching: %s\n",
-                  mRefreshRateConfigs->refreshRateSwitchingSupported() ? "on" : "off");
-    StringAppendF(&result, "+  Smart video mode: %s\n\n", mUseSmart90ForVideo ? "on" : "off");
 
     mRefreshRateStats->dump(result);
     result.append("\n");
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index e6ebb35..50b3ae4 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -503,9 +503,9 @@
     using RefreshRateType = scheduler::RefreshRateConfigs::RefreshRateType;
 
     struct ActiveConfigInfo {
-        RefreshRateType type;
-        int configId;
-        Scheduler::ConfigEvent event;
+        RefreshRateType type = RefreshRateType::DEFAULT;
+        int configId = 0;
+        Scheduler::ConfigEvent event = Scheduler::ConfigEvent::None;
 
         bool operator!=(const ActiveConfigInfo& other) const {
             return type != other.type || configId != other.configId || event != other.event;
@@ -1093,7 +1093,6 @@
     /* ------------------------------------------------------------------------
      * Scheduler
      */
-    bool mUseSmart90ForVideo = false;
     std::unique_ptr<Scheduler> mScheduler;
     scheduler::ConnectionHandle mAppConnectionHandle;
     scheduler::ConnectionHandle mSfConnectionHandle;
diff --git a/services/surfaceflinger/TimeStats/TimeStats.cpp b/services/surfaceflinger/TimeStats/TimeStats.cpp
index 3e47ec6..611afce 100644
--- a/services/surfaceflinger/TimeStats/TimeStats.cpp
+++ b/services/surfaceflinger/TimeStats/TimeStats.cpp
@@ -113,9 +113,9 @@
     mTimeStats.clientCompositionFrames++;
 }
 
-bool TimeStats::recordReadyLocked(int32_t layerID, TimeRecord* timeRecord) {
+bool TimeStats::recordReadyLocked(int32_t layerId, TimeRecord* timeRecord) {
     if (!timeRecord->ready) {
-        ALOGV("[%d]-[%" PRIu64 "]-presentFence is still not received", layerID,
+        ALOGV("[%d]-[%" PRIu64 "]-presentFence is still not received", layerId,
               timeRecord->frameTime.frameNumber);
         return false;
     }
@@ -128,7 +128,7 @@
             timeRecord->frameTime.acquireTime = timeRecord->acquireFence->getSignalTime();
             timeRecord->acquireFence = nullptr;
         } else {
-            ALOGV("[%d]-[%" PRIu64 "]-acquireFence signal time is invalid", layerID,
+            ALOGV("[%d]-[%" PRIu64 "]-acquireFence signal time is invalid", layerId,
                   timeRecord->frameTime.frameNumber);
         }
     }
@@ -141,7 +141,7 @@
             timeRecord->frameTime.presentTime = timeRecord->presentFence->getSignalTime();
             timeRecord->presentFence = nullptr;
         } else {
-            ALOGV("[%d]-[%" PRIu64 "]-presentFence signal time invalid", layerID,
+            ALOGV("[%d]-[%" PRIu64 "]-presentFence signal time invalid", layerId,
                   timeRecord->frameTime.frameNumber);
         }
     }
@@ -155,15 +155,15 @@
     return static_cast<int32_t>(delta);
 }
 
-void TimeStats::flushAvailableRecordsToStatsLocked(int32_t layerID) {
+void TimeStats::flushAvailableRecordsToStatsLocked(int32_t layerId) {
     ATRACE_CALL();
 
-    LayerRecord& layerRecord = mTimeStatsTracker[layerID];
+    LayerRecord& layerRecord = mTimeStatsTracker[layerId];
     TimeRecord& prevTimeRecord = layerRecord.prevTimeRecord;
     std::deque<TimeRecord>& timeRecords = layerRecord.timeRecords;
     while (!timeRecords.empty()) {
-        if (!recordReadyLocked(layerID, &timeRecords[0])) break;
-        ALOGV("[%d]-[%" PRIu64 "]-presentFenceTime[%" PRId64 "]", layerID,
+        if (!recordReadyLocked(layerId, &timeRecords[0])) break;
+        ALOGV("[%d]-[%" PRIu64 "]-presentFenceTime[%" PRId64 "]", layerId,
               timeRecords[0].frameTime.frameNumber, timeRecords[0].frameTime.presentTime);
 
         if (prevTimeRecord.ready) {
@@ -178,37 +178,37 @@
 
             const int32_t postToAcquireMs = msBetween(timeRecords[0].frameTime.postTime,
                                                       timeRecords[0].frameTime.acquireTime);
-            ALOGV("[%d]-[%" PRIu64 "]-post2acquire[%d]", layerID,
+            ALOGV("[%d]-[%" PRIu64 "]-post2acquire[%d]", layerId,
                   timeRecords[0].frameTime.frameNumber, postToAcquireMs);
             timeStatsLayer.deltas["post2acquire"].insert(postToAcquireMs);
 
             const int32_t postToPresentMs = msBetween(timeRecords[0].frameTime.postTime,
                                                       timeRecords[0].frameTime.presentTime);
-            ALOGV("[%d]-[%" PRIu64 "]-post2present[%d]", layerID,
+            ALOGV("[%d]-[%" PRIu64 "]-post2present[%d]", layerId,
                   timeRecords[0].frameTime.frameNumber, postToPresentMs);
             timeStatsLayer.deltas["post2present"].insert(postToPresentMs);
 
             const int32_t acquireToPresentMs = msBetween(timeRecords[0].frameTime.acquireTime,
                                                          timeRecords[0].frameTime.presentTime);
-            ALOGV("[%d]-[%" PRIu64 "]-acquire2present[%d]", layerID,
+            ALOGV("[%d]-[%" PRIu64 "]-acquire2present[%d]", layerId,
                   timeRecords[0].frameTime.frameNumber, acquireToPresentMs);
             timeStatsLayer.deltas["acquire2present"].insert(acquireToPresentMs);
 
             const int32_t latchToPresentMs = msBetween(timeRecords[0].frameTime.latchTime,
                                                        timeRecords[0].frameTime.presentTime);
-            ALOGV("[%d]-[%" PRIu64 "]-latch2present[%d]", layerID,
+            ALOGV("[%d]-[%" PRIu64 "]-latch2present[%d]", layerId,
                   timeRecords[0].frameTime.frameNumber, latchToPresentMs);
             timeStatsLayer.deltas["latch2present"].insert(latchToPresentMs);
 
             const int32_t desiredToPresentMs = msBetween(timeRecords[0].frameTime.desiredTime,
                                                          timeRecords[0].frameTime.presentTime);
-            ALOGV("[%d]-[%" PRIu64 "]-desired2present[%d]", layerID,
+            ALOGV("[%d]-[%" PRIu64 "]-desired2present[%d]", layerId,
                   timeRecords[0].frameTime.frameNumber, desiredToPresentMs);
             timeStatsLayer.deltas["desired2present"].insert(desiredToPresentMs);
 
             const int32_t presentToPresentMs = msBetween(prevTimeRecord.frameTime.presentTime,
                                                          timeRecords[0].frameTime.presentTime);
-            ALOGV("[%d]-[%" PRIu64 "]-present2present[%d]", layerID,
+            ALOGV("[%d]-[%" PRIu64 "]-present2present[%d]", layerId,
                   timeRecords[0].frameTime.frameNumber, presentToPresentMs);
             timeStatsLayer.deltas["present2present"].insert(presentToPresentMs);
         }
@@ -227,28 +227,28 @@
             layerName.compare(0, kMinLenLayerName, kPopupWindowPrefix) != 0;
 }
 
-void TimeStats::setPostTime(int32_t layerID, uint64_t frameNumber, const std::string& layerName,
+void TimeStats::setPostTime(int32_t layerId, uint64_t frameNumber, const std::string& layerName,
                             nsecs_t postTime) {
     if (!mEnabled.load()) return;
 
     ATRACE_CALL();
-    ALOGV("[%d]-[%" PRIu64 "]-[%s]-PostTime[%" PRId64 "]", layerID, frameNumber, layerName.c_str(),
+    ALOGV("[%d]-[%" PRIu64 "]-[%s]-PostTime[%" PRId64 "]", layerId, frameNumber, layerName.c_str(),
           postTime);
 
     std::lock_guard<std::mutex> lock(mMutex);
     if (!mTimeStats.stats.count(layerName) && mTimeStats.stats.size() >= MAX_NUM_LAYER_STATS) {
         return;
     }
-    if (!mTimeStatsTracker.count(layerID) && mTimeStatsTracker.size() < MAX_NUM_LAYER_RECORDS &&
+    if (!mTimeStatsTracker.count(layerId) && mTimeStatsTracker.size() < MAX_NUM_LAYER_RECORDS &&
         layerNameIsValid(layerName)) {
-        mTimeStatsTracker[layerID].layerName = layerName;
+        mTimeStatsTracker[layerId].layerName = layerName;
     }
-    if (!mTimeStatsTracker.count(layerID)) return;
-    LayerRecord& layerRecord = mTimeStatsTracker[layerID];
+    if (!mTimeStatsTracker.count(layerId)) return;
+    LayerRecord& layerRecord = mTimeStatsTracker[layerId];
     if (layerRecord.timeRecords.size() == MAX_NUM_TIME_RECORDS) {
         ALOGE("[%d]-[%s]-timeRecords is at its maximum size[%zu]. Ignore this when unittesting.",
-              layerID, layerRecord.layerName.c_str(), MAX_NUM_TIME_RECORDS);
-        mTimeStatsTracker.erase(layerID);
+              layerId, layerRecord.layerName.c_str(), MAX_NUM_TIME_RECORDS);
+        mTimeStatsTracker.erase(layerId);
         return;
     }
     // For most media content, the acquireFence is invalid because the buffer is
@@ -270,15 +270,15 @@
         layerRecord.waitData = layerRecord.timeRecords.size() - 1;
 }
 
-void TimeStats::setLatchTime(int32_t layerID, uint64_t frameNumber, nsecs_t latchTime) {
+void TimeStats::setLatchTime(int32_t layerId, uint64_t frameNumber, nsecs_t latchTime) {
     if (!mEnabled.load()) return;
 
     ATRACE_CALL();
-    ALOGV("[%d]-[%" PRIu64 "]-LatchTime[%" PRId64 "]", layerID, frameNumber, latchTime);
+    ALOGV("[%d]-[%" PRIu64 "]-LatchTime[%" PRId64 "]", layerId, frameNumber, latchTime);
 
     std::lock_guard<std::mutex> lock(mMutex);
-    if (!mTimeStatsTracker.count(layerID)) return;
-    LayerRecord& layerRecord = mTimeStatsTracker[layerID];
+    if (!mTimeStatsTracker.count(layerId)) return;
+    LayerRecord& layerRecord = mTimeStatsTracker[layerId];
     if (layerRecord.waitData < 0 ||
         layerRecord.waitData >= static_cast<int32_t>(layerRecord.timeRecords.size()))
         return;
@@ -288,15 +288,15 @@
     }
 }
 
-void TimeStats::setDesiredTime(int32_t layerID, uint64_t frameNumber, nsecs_t desiredTime) {
+void TimeStats::setDesiredTime(int32_t layerId, uint64_t frameNumber, nsecs_t desiredTime) {
     if (!mEnabled.load()) return;
 
     ATRACE_CALL();
-    ALOGV("[%d]-[%" PRIu64 "]-DesiredTime[%" PRId64 "]", layerID, frameNumber, desiredTime);
+    ALOGV("[%d]-[%" PRIu64 "]-DesiredTime[%" PRId64 "]", layerId, frameNumber, desiredTime);
 
     std::lock_guard<std::mutex> lock(mMutex);
-    if (!mTimeStatsTracker.count(layerID)) return;
-    LayerRecord& layerRecord = mTimeStatsTracker[layerID];
+    if (!mTimeStatsTracker.count(layerId)) return;
+    LayerRecord& layerRecord = mTimeStatsTracker[layerId];
     if (layerRecord.waitData < 0 ||
         layerRecord.waitData >= static_cast<int32_t>(layerRecord.timeRecords.size()))
         return;
@@ -306,15 +306,15 @@
     }
 }
 
-void TimeStats::setAcquireTime(int32_t layerID, uint64_t frameNumber, nsecs_t acquireTime) {
+void TimeStats::setAcquireTime(int32_t layerId, uint64_t frameNumber, nsecs_t acquireTime) {
     if (!mEnabled.load()) return;
 
     ATRACE_CALL();
-    ALOGV("[%d]-[%" PRIu64 "]-AcquireTime[%" PRId64 "]", layerID, frameNumber, acquireTime);
+    ALOGV("[%d]-[%" PRIu64 "]-AcquireTime[%" PRId64 "]", layerId, frameNumber, acquireTime);
 
     std::lock_guard<std::mutex> lock(mMutex);
-    if (!mTimeStatsTracker.count(layerID)) return;
-    LayerRecord& layerRecord = mTimeStatsTracker[layerID];
+    if (!mTimeStatsTracker.count(layerId)) return;
+    LayerRecord& layerRecord = mTimeStatsTracker[layerId];
     if (layerRecord.waitData < 0 ||
         layerRecord.waitData >= static_cast<int32_t>(layerRecord.timeRecords.size()))
         return;
@@ -324,17 +324,17 @@
     }
 }
 
-void TimeStats::setAcquireFence(int32_t layerID, uint64_t frameNumber,
+void TimeStats::setAcquireFence(int32_t layerId, uint64_t frameNumber,
                                 const std::shared_ptr<FenceTime>& acquireFence) {
     if (!mEnabled.load()) return;
 
     ATRACE_CALL();
-    ALOGV("[%d]-[%" PRIu64 "]-AcquireFenceTime[%" PRId64 "]", layerID, frameNumber,
+    ALOGV("[%d]-[%" PRIu64 "]-AcquireFenceTime[%" PRId64 "]", layerId, frameNumber,
           acquireFence->getSignalTime());
 
     std::lock_guard<std::mutex> lock(mMutex);
-    if (!mTimeStatsTracker.count(layerID)) return;
-    LayerRecord& layerRecord = mTimeStatsTracker[layerID];
+    if (!mTimeStatsTracker.count(layerId)) return;
+    LayerRecord& layerRecord = mTimeStatsTracker[layerId];
     if (layerRecord.waitData < 0 ||
         layerRecord.waitData >= static_cast<int32_t>(layerRecord.timeRecords.size()))
         return;
@@ -344,15 +344,15 @@
     }
 }
 
-void TimeStats::setPresentTime(int32_t layerID, uint64_t frameNumber, nsecs_t presentTime) {
+void TimeStats::setPresentTime(int32_t layerId, uint64_t frameNumber, nsecs_t presentTime) {
     if (!mEnabled.load()) return;
 
     ATRACE_CALL();
-    ALOGV("[%d]-[%" PRIu64 "]-PresentTime[%" PRId64 "]", layerID, frameNumber, presentTime);
+    ALOGV("[%d]-[%" PRIu64 "]-PresentTime[%" PRId64 "]", layerId, frameNumber, presentTime);
 
     std::lock_guard<std::mutex> lock(mMutex);
-    if (!mTimeStatsTracker.count(layerID)) return;
-    LayerRecord& layerRecord = mTimeStatsTracker[layerID];
+    if (!mTimeStatsTracker.count(layerId)) return;
+    LayerRecord& layerRecord = mTimeStatsTracker[layerId];
     if (layerRecord.waitData < 0 ||
         layerRecord.waitData >= static_cast<int32_t>(layerRecord.timeRecords.size()))
         return;
@@ -363,20 +363,20 @@
         layerRecord.waitData++;
     }
 
-    flushAvailableRecordsToStatsLocked(layerID);
+    flushAvailableRecordsToStatsLocked(layerId);
 }
 
-void TimeStats::setPresentFence(int32_t layerID, uint64_t frameNumber,
+void TimeStats::setPresentFence(int32_t layerId, uint64_t frameNumber,
                                 const std::shared_ptr<FenceTime>& presentFence) {
     if (!mEnabled.load()) return;
 
     ATRACE_CALL();
-    ALOGV("[%d]-[%" PRIu64 "]-PresentFenceTime[%" PRId64 "]", layerID, frameNumber,
+    ALOGV("[%d]-[%" PRIu64 "]-PresentFenceTime[%" PRId64 "]", layerId, frameNumber,
           presentFence->getSignalTime());
 
     std::lock_guard<std::mutex> lock(mMutex);
-    if (!mTimeStatsTracker.count(layerID)) return;
-    LayerRecord& layerRecord = mTimeStatsTracker[layerID];
+    if (!mTimeStatsTracker.count(layerId)) return;
+    LayerRecord& layerRecord = mTimeStatsTracker[layerId];
     if (layerRecord.waitData < 0 ||
         layerRecord.waitData >= static_cast<int32_t>(layerRecord.timeRecords.size()))
         return;
@@ -387,25 +387,25 @@
         layerRecord.waitData++;
     }
 
-    flushAvailableRecordsToStatsLocked(layerID);
+    flushAvailableRecordsToStatsLocked(layerId);
 }
 
-void TimeStats::onDestroy(int32_t layerID) {
+void TimeStats::onDestroy(int32_t layerId) {
     ATRACE_CALL();
-    ALOGV("[%d]-onDestroy", layerID);
+    ALOGV("[%d]-onDestroy", layerId);
     std::lock_guard<std::mutex> lock(mMutex);
-    mTimeStatsTracker.erase(layerID);
+    mTimeStatsTracker.erase(layerId);
 }
 
-void TimeStats::removeTimeRecord(int32_t layerID, uint64_t frameNumber) {
+void TimeStats::removeTimeRecord(int32_t layerId, uint64_t frameNumber) {
     if (!mEnabled.load()) return;
 
     ATRACE_CALL();
-    ALOGV("[%d]-[%" PRIu64 "]-removeTimeRecord", layerID, frameNumber);
+    ALOGV("[%d]-[%" PRIu64 "]-removeTimeRecord", layerId, frameNumber);
 
     std::lock_guard<std::mutex> lock(mMutex);
-    if (!mTimeStatsTracker.count(layerID)) return;
-    LayerRecord& layerRecord = mTimeStatsTracker[layerID];
+    if (!mTimeStatsTracker.count(layerId)) return;
+    LayerRecord& layerRecord = mTimeStatsTracker[layerId];
     size_t removeAt = 0;
     for (const TimeRecord& record : layerRecord.timeRecords) {
         if (record.frameTime.frameNumber == frameNumber) break;
diff --git a/services/surfaceflinger/TimeStats/TimeStats.h b/services/surfaceflinger/TimeStats/TimeStats.h
index 1313132..6e71f5a 100644
--- a/services/surfaceflinger/TimeStats/TimeStats.h
+++ b/services/surfaceflinger/TimeStats/TimeStats.h
@@ -44,20 +44,20 @@
     virtual void incrementMissedFrames() = 0;
     virtual void incrementClientCompositionFrames() = 0;
 
-    virtual void setPostTime(int32_t layerID, uint64_t frameNumber, const std::string& layerName,
+    virtual void setPostTime(int32_t layerId, uint64_t frameNumber, const std::string& layerName,
                              nsecs_t postTime) = 0;
-    virtual void setLatchTime(int32_t layerID, uint64_t frameNumber, nsecs_t latchTime) = 0;
-    virtual void setDesiredTime(int32_t layerID, uint64_t frameNumber, nsecs_t desiredTime) = 0;
-    virtual void setAcquireTime(int32_t layerID, uint64_t frameNumber, nsecs_t acquireTime) = 0;
-    virtual void setAcquireFence(int32_t layerID, uint64_t frameNumber,
+    virtual void setLatchTime(int32_t layerId, uint64_t frameNumber, nsecs_t latchTime) = 0;
+    virtual void setDesiredTime(int32_t layerId, uint64_t frameNumber, nsecs_t desiredTime) = 0;
+    virtual void setAcquireTime(int32_t layerId, uint64_t frameNumber, nsecs_t acquireTime) = 0;
+    virtual void setAcquireFence(int32_t layerId, uint64_t frameNumber,
                                  const std::shared_ptr<FenceTime>& acquireFence) = 0;
-    virtual void setPresentTime(int32_t layerID, uint64_t frameNumber, nsecs_t presentTime) = 0;
-    virtual void setPresentFence(int32_t layerID, uint64_t frameNumber,
+    virtual void setPresentTime(int32_t layerId, uint64_t frameNumber, nsecs_t presentTime) = 0;
+    virtual void setPresentFence(int32_t layerId, uint64_t frameNumber,
                                  const std::shared_ptr<FenceTime>& presentFence) = 0;
     // Clean up the layer record
-    virtual void onDestroy(int32_t layerID) = 0;
+    virtual void onDestroy(int32_t layerId) = 0;
     // If SF skips or rejects a buffer, remove the corresponding TimeRecord.
-    virtual void removeTimeRecord(int32_t layerID, uint64_t frameNumber) = 0;
+    virtual void removeTimeRecord(int32_t layerId, uint64_t frameNumber) = 0;
 
     virtual void setPowerMode(int32_t powerMode) = 0;
     // Source of truth is RefrehRateStats.
@@ -116,20 +116,20 @@
     void incrementMissedFrames() override;
     void incrementClientCompositionFrames() override;
 
-    void setPostTime(int32_t layerID, uint64_t frameNumber, const std::string& layerName,
+    void setPostTime(int32_t layerId, uint64_t frameNumber, const std::string& layerName,
                      nsecs_t postTime) override;
-    void setLatchTime(int32_t layerID, uint64_t frameNumber, nsecs_t latchTime) override;
-    void setDesiredTime(int32_t layerID, uint64_t frameNumber, nsecs_t desiredTime) override;
-    void setAcquireTime(int32_t layerID, uint64_t frameNumber, nsecs_t acquireTime) override;
-    void setAcquireFence(int32_t layerID, uint64_t frameNumber,
+    void setLatchTime(int32_t layerId, uint64_t frameNumber, nsecs_t latchTime) override;
+    void setDesiredTime(int32_t layerId, uint64_t frameNumber, nsecs_t desiredTime) override;
+    void setAcquireTime(int32_t layerId, uint64_t frameNumber, nsecs_t acquireTime) override;
+    void setAcquireFence(int32_t layerId, uint64_t frameNumber,
                          const std::shared_ptr<FenceTime>& acquireFence) override;
-    void setPresentTime(int32_t layerID, uint64_t frameNumber, nsecs_t presentTime) override;
-    void setPresentFence(int32_t layerID, uint64_t frameNumber,
+    void setPresentTime(int32_t layerId, uint64_t frameNumber, nsecs_t presentTime) override;
+    void setPresentFence(int32_t layerId, uint64_t frameNumber,
                          const std::shared_ptr<FenceTime>& presentFence) override;
     // Clean up the layer record
-    void onDestroy(int32_t layerID) override;
+    void onDestroy(int32_t layerId) override;
     // If SF skips or rejects a buffer, remove the corresponding TimeRecord.
-    void removeTimeRecord(int32_t layerID, uint64_t frameNumber) override;
+    void removeTimeRecord(int32_t layerId, uint64_t frameNumber) override;
 
     void setPowerMode(int32_t powerMode) override;
     // Source of truth is RefrehRateStats.
@@ -139,8 +139,8 @@
     static const size_t MAX_NUM_TIME_RECORDS = 64;
 
 private:
-    bool recordReadyLocked(int32_t layerID, TimeRecord* timeRecord);
-    void flushAvailableRecordsToStatsLocked(int32_t layerID);
+    bool recordReadyLocked(int32_t layerId, TimeRecord* timeRecord);
+    void flushAvailableRecordsToStatsLocked(int32_t layerId);
     void flushPowerTimeLocked();
     void flushAvailableGlobalRecordsToStatsLocked();
 
@@ -152,7 +152,7 @@
     std::atomic<bool> mEnabled = false;
     std::mutex mMutex;
     TimeStatsHelper::TimeStatsGlobal mTimeStats;
-    // Hashmap for LayerRecord with layerID as the hash key
+    // Hashmap for LayerRecord with layerId as the hash key
     std::unordered_map<int32_t, LayerRecord> mTimeStatsTracker;
     PowerTime mPowerTime;
     GlobalRecord mGlobalRecord;
diff --git a/services/surfaceflinger/TransactionCompletedThread.cpp b/services/surfaceflinger/TransactionCompletedThread.cpp
index 8db03db..c15355d 100644
--- a/services/surfaceflinger/TransactionCompletedThread.cpp
+++ b/services/surfaceflinger/TransactionCompletedThread.cpp
@@ -189,6 +189,15 @@
     return NO_ERROR;
 }
 
+void TransactionCompletedThread::clearAllPending() {
+    std::lock_guard lock(mMutex);
+    if (!mRunning) {
+        return;
+    }
+    mPendingTransactions.clear();
+    mConditionVariable.notify_all();
+}
+
 status_t TransactionCompletedThread::registerUnpresentedCallbackHandle(
         const sp<CallbackHandle>& handle) {
     std::lock_guard lock(mMutex);
diff --git a/services/surfaceflinger/TransactionCompletedThread.h b/services/surfaceflinger/TransactionCompletedThread.h
index 12ea8fe..cd95bfb 100644
--- a/services/surfaceflinger/TransactionCompletedThread.h
+++ b/services/surfaceflinger/TransactionCompletedThread.h
@@ -70,6 +70,8 @@
     // Notifies the TransactionCompletedThread that a pending CallbackHandle has been presented.
     status_t finalizePendingCallbackHandles(const std::deque<sp<CallbackHandle>>& handles);
 
+    void clearAllPending();
+
     // Adds the Transaction CallbackHandle from a layer that does not need to be relatched and
     // presented this frame.
     status_t registerUnpresentedCallbackHandle(const sp<CallbackHandle>& handle);
diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index 78114a1..0c4a752 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -55,6 +55,8 @@
         "TransactionApplicationTest.cpp",
         "StrongTypingTest.cpp",
         "VSyncDispatchTimerQueueTest.cpp",
+        "VSyncDispatchRealtimeTest.cpp",
+        "VSyncPredictorTest.cpp",
         "mock/DisplayHardware/MockComposer.cpp",
         "mock/DisplayHardware/MockDisplay.cpp",
         "mock/DisplayHardware/MockPowerAdvisor.cpp",
diff --git a/services/surfaceflinger/tests/unittests/CompositionTest.cpp b/services/surfaceflinger/tests/unittests/CompositionTest.cpp
index 6d38373..32f997f 100644
--- a/services/surfaceflinger/tests/unittests/CompositionTest.cpp
+++ b/services/surfaceflinger/tests/unittests/CompositionTest.cpp
@@ -810,6 +810,9 @@
 
         sp<L> layer = factory();
 
+        // Layer should be registered with scheduler.
+        EXPECT_EQ(1, test->mFlinger.scheduler()->layerHistorySize());
+
         Mock::VerifyAndClear(test->mComposer);
         Mock::VerifyAndClear(test->mRenderEngine);
         Mock::VerifyAndClear(test->mMessageQueue);
@@ -845,6 +848,10 @@
 
         test->mDisplay->getCompositionDisplay()->clearOutputLayers();
         test->mFlinger.mutableDrawingState().layersSortedByZ.clear();
+
+        // Layer should be unregistered with scheduler.
+        test->mFlinger.onMessageReceived(MessageQueue::INVALIDATE);
+        EXPECT_EQ(0, test->mFlinger.scheduler()->layerHistorySize());
     }
 };
 
diff --git a/services/surfaceflinger/tests/unittests/FrameTracerTest.cpp b/services/surfaceflinger/tests/unittests/FrameTracerTest.cpp
index b5af591..c334bcf 100644
--- a/services/surfaceflinger/tests/unittests/FrameTracerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/FrameTracerTest.cpp
@@ -82,8 +82,8 @@
               "FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");
 
     const std::string layerName = "co.layername#0";
-    const int32_t layerID = 5;
-    mFrameTracer->traceNewLayer(layerID, layerName);
+    const int32_t layerId = 5;
+    mFrameTracer->traceNewLayer(layerId, layerName);
 
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");
@@ -92,7 +92,7 @@
     tracingSession->StartBlocking();
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");
-    mFrameTracer->traceNewLayer(layerID, layerName);
+    mFrameTracer->traceNewLayer(layerId, layerName);
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 1\n");
     tracingSession->StopBlocking();
@@ -103,31 +103,31 @@
               "FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");
 
     const std::string layerName = "co.layername#0";
-    const int32_t layerID = 5;
-    const int32_t secondLayerID = 6;
+    const int32_t layerId = 5;
+    const int32_t secondlayerId = 6;
 
     auto tracingSession = getTracingSessionForTest();
     tracingSession->StartBlocking();
-    mFrameTracer->traceNewLayer(layerID, layerName);
-    mFrameTracer->traceNewLayer(secondLayerID, layerName);
+    mFrameTracer->traceNewLayer(layerId, layerName);
+    mFrameTracer->traceNewLayer(secondlayerId, layerName);
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 2\n");
     tracingSession->StopBlocking();
 
-    mFrameTracer->onDestroy(layerID);
+    mFrameTracer->onDestroy(layerId);
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 1\n");
-    mFrameTracer->onDestroy(layerID);
+    mFrameTracer->onDestroy(layerId);
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 1\n");
-    mFrameTracer->onDestroy(secondLayerID);
+    mFrameTracer->onDestroy(secondlayerId);
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");
 }
 
 TEST_F(FrameTracerTest, canTraceAfterAddingLayer) {
     const std::string layerName = "co.layername#0";
-    const int32_t layerID = 1;
+    const int32_t layerId = 1;
     const uint32_t bufferID = 2;
     const uint64_t frameNumber = 3;
     const nsecs_t timestamp = 4;
@@ -141,9 +141,9 @@
         // Clean up irrelevant traces.
         tracingSession->ReadTraceBlocking();
 
-        mFrameTracer->traceTimestamp(layerID, bufferID, frameNumber, timestamp, type, duration);
+        mFrameTracer->traceTimestamp(layerId, bufferID, frameNumber, timestamp, type, duration);
         // Create second trace packet to finalize the previous one.
-        mFrameTracer->traceTimestamp(layerID, 0, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
+        mFrameTracer->traceTimestamp(layerId, 0, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
         tracingSession->StopBlocking();
 
         std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
@@ -157,10 +157,10 @@
         // Clean up irrelevant traces.
         tracingSession->ReadTraceBlocking();
 
-        mFrameTracer->traceNewLayer(layerID, layerName);
-        mFrameTracer->traceTimestamp(layerID, bufferID, frameNumber, timestamp, type, duration);
+        mFrameTracer->traceNewLayer(layerId, layerName);
+        mFrameTracer->traceTimestamp(layerId, bufferID, frameNumber, timestamp, type, duration);
         // Create second trace packet to finalize the previous one.
-        mFrameTracer->traceTimestamp(layerID, 0, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
+        mFrameTracer->traceTimestamp(layerId, 0, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
         tracingSession->StopBlocking();
 
         std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
@@ -191,7 +191,7 @@
 
 TEST_F(FrameTracerTest, traceFenceTriggersOnNextTraceAfterFenceFired) {
     const std::string layerName = "co.layername#0";
-    const int32_t layerID = 5;
+    const int32_t layerId = 5;
     const uint32_t bufferID = 4;
     const uint64_t frameNumber = 3;
     const auto type = FrameTracer::FrameEvent::ACQUIRE_FENCE;
@@ -204,10 +204,10 @@
         // Clean up irrelevant traces.
         tracingSession->ReadTraceBlocking();
         // Trace.
-        mFrameTracer->traceNewLayer(layerID, layerName);
-        mFrameTracer->traceFence(layerID, bufferID, frameNumber, fenceTime, type);
+        mFrameTracer->traceNewLayer(layerId, layerName);
+        mFrameTracer->traceFence(layerId, bufferID, frameNumber, fenceTime, type);
         // Create extra trace packet to (hopefully not) trigger and finalize the fence packet.
-        mFrameTracer->traceTimestamp(layerID, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
+        mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
         tracingSession->StopBlocking();
         std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
         EXPECT_EQ(raw_trace.size(), 0);
@@ -219,12 +219,12 @@
         tracingSession->StartBlocking();
         // Clean up irrelevant traces.
         tracingSession->ReadTraceBlocking();
-        mFrameTracer->traceNewLayer(layerID, layerName);
-        mFrameTracer->traceFence(layerID, bufferID, frameNumber, fenceTime, type);
+        mFrameTracer->traceNewLayer(layerId, layerName);
+        mFrameTracer->traceFence(layerId, bufferID, frameNumber, fenceTime, type);
         const nsecs_t timestamp = systemTime();
         fenceFactory.signalAllForTest(Fence::NO_FENCE, timestamp);
         // Create extra trace packet to trigger and finalize fence trace packets.
-        mFrameTracer->traceTimestamp(layerID, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
+        mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
         tracingSession->StopBlocking();
 
         std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
@@ -254,7 +254,7 @@
 
 TEST_F(FrameTracerTest, traceFenceWithStartTimeAfterSignalTime_ShouldHaveNoDuration) {
     const std::string layerName = "co.layername#0";
-    const int32_t layerID = 5;
+    const int32_t layerId = 5;
     const uint32_t bufferID = 4;
     const uint64_t frameNumber = 3;
     const auto type = FrameTracer::FrameEvent::ACQUIRE_FENCE;
@@ -264,24 +264,24 @@
     tracingSession->StartBlocking();
     // Clean up irrelevant traces.
     tracingSession->ReadTraceBlocking();
-    mFrameTracer->traceNewLayer(layerID, layerName);
+    mFrameTracer->traceNewLayer(layerId, layerName);
 
     // traceFence called after fence signalled.
     const nsecs_t signalTime1 = systemTime();
     const nsecs_t startTime1 = signalTime1 + 100000;
     auto fence1 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
     fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime1);
-    mFrameTracer->traceFence(layerID, bufferID, frameNumber, fence1, type, startTime1);
+    mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence1, type, startTime1);
 
     // traceFence called before fence signalled.
     const nsecs_t signalTime2 = systemTime();
     const nsecs_t startTime2 = signalTime2 + 100000;
     auto fence2 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
-    mFrameTracer->traceFence(layerID, bufferID, frameNumber, fence2, type, startTime2);
+    mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence2, type, startTime2);
     fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime2);
 
     // Create extra trace packet to trigger and finalize fence trace packets.
-    mFrameTracer->traceTimestamp(layerID, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
+    mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
     tracingSession->StopBlocking();
 
     std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
@@ -309,7 +309,7 @@
 
 TEST_F(FrameTracerTest, traceFenceOlderThanDeadline_ShouldBeIgnored) {
     const std::string layerName = "co.layername#0";
-    const int32_t layerID = 5;
+    const int32_t layerId = 5;
     const uint32_t bufferID = 4;
     const uint64_t frameNumber = 3;
     const auto type = FrameTracer::FrameEvent::ACQUIRE_FENCE;
@@ -321,11 +321,11 @@
     tracingSession->StartBlocking();
     // Clean up irrelevant traces.
     tracingSession->ReadTraceBlocking();
-    mFrameTracer->traceNewLayer(layerID, layerName);
-    mFrameTracer->traceFence(layerID, bufferID, frameNumber, fence, type);
+    mFrameTracer->traceNewLayer(layerId, layerName);
+    mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence, type);
     fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime);
     // Create extra trace packet to trigger and finalize any previous fence packets.
-    mFrameTracer->traceTimestamp(layerID, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
+    mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
     tracingSession->StopBlocking();
 
     std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
@@ -334,7 +334,7 @@
 
 TEST_F(FrameTracerTest, traceFenceWithValidStartTime_ShouldHaveCorrectDuration) {
     const std::string layerName = "co.layername#0";
-    const int32_t layerID = 5;
+    const int32_t layerId = 5;
     const uint32_t bufferID = 4;
     const uint64_t frameNumber = 3;
     const auto type = FrameTracer::FrameEvent::ACQUIRE_FENCE;
@@ -345,24 +345,24 @@
     tracingSession->StartBlocking();
     // Clean up irrelevant traces.
     tracingSession->ReadTraceBlocking();
-    mFrameTracer->traceNewLayer(layerID, layerName);
+    mFrameTracer->traceNewLayer(layerId, layerName);
 
     // traceFence called after fence signalled.
     const nsecs_t signalTime1 = systemTime();
     const nsecs_t startTime1 = signalTime1 - duration;
     auto fence1 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
     fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime1);
-    mFrameTracer->traceFence(layerID, bufferID, frameNumber, fence1, type, startTime1);
+    mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence1, type, startTime1);
 
     // traceFence called before fence signalled.
     const nsecs_t signalTime2 = systemTime();
     const nsecs_t startTime2 = signalTime2 - duration;
     auto fence2 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
-    mFrameTracer->traceFence(layerID, bufferID, frameNumber, fence2, type, startTime2);
+    mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence2, type, startTime2);
     fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime2);
 
     // Create extra trace packet to trigger and finalize fence trace packets.
-    mFrameTracer->traceTimestamp(layerID, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
+    mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
     tracingSession->StopBlocking();
 
     std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
diff --git a/services/surfaceflinger/tests/unittests/LayerHistoryTest.cpp b/services/surfaceflinger/tests/unittests/LayerHistoryTest.cpp
index 9a962bc..e93d31e 100644
--- a/services/surfaceflinger/tests/unittests/LayerHistoryTest.cpp
+++ b/services/surfaceflinger/tests/unittests/LayerHistoryTest.cpp
@@ -29,10 +29,10 @@
 
     LayerHistoryTest() { mFlinger.resetScheduler(mScheduler); }
 
-    LayerHistory& history() { return mScheduler->mutableLayerHistory(); }
-    const LayerHistory& history() const { return mScheduler->mutableLayerHistory(); }
+    LayerHistory& history() { return *mScheduler->mutableLayerHistory(); }
+    const LayerHistory& history() const { return *mScheduler->mutableLayerHistory(); }
 
-    size_t layerCount() const NO_THREAD_SAFETY_ANALYSIS { return history().mLayerInfos.size(); }
+    size_t layerCount() const { return mScheduler->layerHistorySize(); }
     size_t activeLayerCount() const NO_THREAD_SAFETY_ANALYSIS { return history().mActiveLayersEnd; }
 
     size_t frequentLayerCount(nsecs_t now) const NO_THREAD_SAFETY_ANALYSIS {
diff --git a/services/surfaceflinger/tests/unittests/TestableScheduler.h b/services/surfaceflinger/tests/unittests/TestableScheduler.h
index ae6aa89..40c00c4 100644
--- a/services/surfaceflinger/tests/unittests/TestableScheduler.h
+++ b/services/surfaceflinger/tests/unittests/TestableScheduler.h
@@ -21,6 +21,7 @@
 
 #include "Scheduler/DispSync.h"
 #include "Scheduler/EventThread.h"
+#include "Scheduler/LayerHistory.h"
 #include "Scheduler/Scheduler.h"
 
 namespace android {
@@ -28,18 +29,26 @@
 class TestableScheduler : public Scheduler {
 public:
     explicit TestableScheduler(const scheduler::RefreshRateConfigs& configs)
-          : Scheduler([](bool) {}, configs) {}
+          : Scheduler([](bool) {}, configs) {
+        mLayerHistory.emplace();
+    }
 
     TestableScheduler(std::unique_ptr<DispSync> primaryDispSync,
                       std::unique_ptr<EventControlThread> eventControlThread,
                       const scheduler::RefreshRateConfigs& configs)
-          : Scheduler(std::move(primaryDispSync), std::move(eventControlThread), configs) {}
+          : Scheduler(std::move(primaryDispSync), std::move(eventControlThread), configs) {
+        mLayerHistory.emplace();
+    }
 
     // Used to inject mock event thread.
     ConnectionHandle createConnection(std::unique_ptr<EventThread> eventThread) {
         return Scheduler::createConnection(std::move(eventThread));
     }
 
+    size_t layerHistorySize() const NO_THREAD_SAFETY_ANALYSIS {
+        return mLayerHistory->mLayerInfos.size();
+    }
+
     /* ------------------------------------------------------------------------
      * Read-write access to private data to set up preconditions and assert
      * post-conditions.
diff --git a/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp b/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
index 4eb9ec3..7b60fa2 100644
--- a/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
@@ -170,8 +170,8 @@
     return result;
 }
 
-static std::string genLayerName(int32_t layerID) {
-    return (layerID < 0 ? "PopupWindow:b54fcd1#0" : "com.dummy#") + std::to_string(layerID);
+static std::string genLayerName(int32_t layerId) {
+    return (layerId < 0 ? "PopupWindow:b54fcd1#0" : "com.dummy#") + std::to_string(layerId);
 }
 
 void TimeStatsTest::setTimeStamp(TimeStamp type, int32_t id, uint64_t frameNumber, nsecs_t ts) {
@@ -560,22 +560,22 @@
     EXPECT_TRUE(inputCommand(InputCommand::ENABLE, FMT_STRING).empty());
 
     for (size_t i = 0; i < 10000000; ++i) {
-        const int32_t layerID = genRandomInt32(-1, 10);
+        const int32_t layerId = genRandomInt32(-1, 10);
         const int32_t frameNumber = genRandomInt32(1, 10);
         switch (genRandomInt32(0, 100)) {
             case 0:
                 ALOGV("removeTimeRecord");
-                ASSERT_NO_FATAL_FAILURE(mTimeStats->removeTimeRecord(layerID, frameNumber));
+                ASSERT_NO_FATAL_FAILURE(mTimeStats->removeTimeRecord(layerId, frameNumber));
                 continue;
             case 1:
                 ALOGV("onDestroy");
-                ASSERT_NO_FATAL_FAILURE(mTimeStats->onDestroy(layerID));
+                ASSERT_NO_FATAL_FAILURE(mTimeStats->onDestroy(layerId));
                 continue;
         }
         TimeStamp type = static_cast<TimeStamp>(genRandomInt32(TIME_STAMP_BEGIN, TIME_STAMP_END));
         const int32_t ts = genRandomInt32(1, 1000000000);
-        ALOGV("type[%d], layerID[%d], frameNumber[%d], ts[%d]", type, layerID, frameNumber, ts);
-        setTimeStamp(type, layerID, frameNumber, ts);
+        ALOGV("type[%d], layerId[%d], frameNumber[%d], ts[%d]", type, layerId, frameNumber, ts);
+        setTimeStamp(type, layerId, frameNumber, ts);
     }
 }
 
diff --git a/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp b/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
new file mode 100644
index 0000000..c012616
--- /dev/null
+++ b/services/surfaceflinger/tests/unittests/VSyncDispatchRealtimeTest.cpp
@@ -0,0 +1,201 @@
+/*
+ * Copyright 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "Scheduler/TimeKeeper.h"
+#include "Scheduler/Timer.h"
+#include "Scheduler/VSyncDispatchTimerQueue.h"
+#include "Scheduler/VSyncTracker.h"
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#include <thread>
+
+using namespace testing;
+using namespace std::literals;
+
+namespace android::scheduler {
+
+template <typename Rep, typename Per>
+constexpr nsecs_t toNs(std::chrono::duration<Rep, Per> const& tp) {
+    return std::chrono::duration_cast<std::chrono::nanoseconds>(tp).count();
+}
+
+class FixedRateIdealStubTracker : public VSyncTracker {
+public:
+    FixedRateIdealStubTracker() : mPeriod{toNs(3ms)} {}
+
+    void addVsyncTimestamp(nsecs_t) final {}
+
+    nsecs_t nextAnticipatedVSyncTimeFrom(nsecs_t timePoint) const final {
+        auto const floor = timePoint % mPeriod;
+        if (floor == 0) {
+            return timePoint;
+        }
+        return timePoint - floor + mPeriod;
+    }
+
+private:
+    nsecs_t const mPeriod;
+};
+
+class VRRStubTracker : public VSyncTracker {
+public:
+    VRRStubTracker(nsecs_t period) : mPeriod{period} {}
+
+    void addVsyncTimestamp(nsecs_t) final {}
+
+    nsecs_t nextAnticipatedVSyncTimeFrom(nsecs_t time_point) const final {
+        std::lock_guard<decltype(mMutex)> lk(mMutex);
+        auto const normalized_to_base = time_point - mBase;
+        auto const floor = (normalized_to_base) % mPeriod;
+        if (floor == 0) {
+            return time_point;
+        }
+        return normalized_to_base - floor + mPeriod + mBase;
+    }
+
+    void set_interval(nsecs_t interval, nsecs_t last_known) {
+        std::lock_guard<decltype(mMutex)> lk(mMutex);
+        mPeriod = interval;
+        mBase = last_known;
+    }
+
+private:
+    std::mutex mutable mMutex;
+    nsecs_t mPeriod;
+    nsecs_t mBase = 0;
+};
+
+struct VSyncDispatchRealtimeTest : testing::Test {
+    static nsecs_t constexpr mDispatchGroupThreshold = toNs(100us);
+    static size_t constexpr mIterations = 20;
+};
+
+class RepeatingCallbackReceiver {
+public:
+    RepeatingCallbackReceiver(VSyncDispatch& dispatch, nsecs_t wl)
+          : mWorkload(wl),
+            mCallback(
+                    dispatch, [&](auto time) { callback_called(time); }, "repeat0") {}
+
+    void repeatedly_schedule(size_t iterations, std::function<void(nsecs_t)> const& onEachFrame) {
+        mCallbackTimes.reserve(iterations);
+        mCallback.schedule(mWorkload, systemTime(SYSTEM_TIME_MONOTONIC) + mWorkload);
+
+        for (auto i = 0u; i < iterations - 1; i++) {
+            std::unique_lock<decltype(mMutex)> lk(mMutex);
+            mCv.wait(lk, [&] { return mCalled; });
+            mCalled = false;
+            auto last = mLastTarget;
+            lk.unlock();
+
+            onEachFrame(last);
+
+            mCallback.schedule(mWorkload, last + mWorkload);
+        }
+
+        // wait for the last callback.
+        std::unique_lock<decltype(mMutex)> lk(mMutex);
+        mCv.wait(lk, [&] { return mCalled; });
+    }
+
+    void with_callback_times(std::function<void(std::vector<nsecs_t> const&)> const& fn) const {
+        fn(mCallbackTimes);
+    }
+
+private:
+    void callback_called(nsecs_t time) {
+        std::lock_guard<decltype(mMutex)> lk(mMutex);
+        mCallbackTimes.push_back(time);
+        mCalled = true;
+        mLastTarget = time;
+        mCv.notify_all();
+    }
+
+    nsecs_t const mWorkload;
+    VSyncCallbackRegistration mCallback;
+
+    std::mutex mMutex;
+    std::condition_variable mCv;
+    bool mCalled = false;
+    nsecs_t mLastTarget = 0;
+    std::vector<nsecs_t> mCallbackTimes;
+};
+
+TEST_F(VSyncDispatchRealtimeTest, triple_alarm) {
+    FixedRateIdealStubTracker tracker;
+    VSyncDispatchTimerQueue dispatch(std::make_unique<Timer>(), tracker, mDispatchGroupThreshold);
+
+    static size_t constexpr num_clients = 3;
+    std::array<RepeatingCallbackReceiver, num_clients>
+            cb_receiver{RepeatingCallbackReceiver(dispatch, toNs(1500us)),
+                        RepeatingCallbackReceiver(dispatch, toNs(0h)),
+                        RepeatingCallbackReceiver(dispatch, toNs(1ms))};
+
+    auto const on_each_frame = [](nsecs_t) {};
+    std::array<std::thread, num_clients> threads{
+            std::thread([&] { cb_receiver[0].repeatedly_schedule(mIterations, on_each_frame); }),
+            std::thread([&] { cb_receiver[1].repeatedly_schedule(mIterations, on_each_frame); }),
+            std::thread([&] { cb_receiver[2].repeatedly_schedule(mIterations, on_each_frame); }),
+    };
+
+    for (auto it = threads.rbegin(); it != threads.rend(); it++) {
+        it->join();
+    }
+
+    for (auto const& cbs : cb_receiver) {
+        cbs.with_callback_times([](auto times) { EXPECT_THAT(times.size(), Eq(mIterations)); });
+    }
+}
+
+// starts at 333hz, slides down to 43hz
+TEST_F(VSyncDispatchRealtimeTest, vascillating_vrr) {
+    auto next_vsync_interval = toNs(3ms);
+    VRRStubTracker tracker(next_vsync_interval);
+    VSyncDispatchTimerQueue dispatch(std::make_unique<Timer>(), tracker, mDispatchGroupThreshold);
+
+    RepeatingCallbackReceiver cb_receiver(dispatch, toNs(1ms));
+
+    auto const on_each_frame = [&](nsecs_t last_known) {
+        tracker.set_interval(next_vsync_interval += toNs(1ms), last_known);
+    };
+
+    std::thread eventThread([&] { cb_receiver.repeatedly_schedule(mIterations, on_each_frame); });
+    eventThread.join();
+
+    cb_receiver.with_callback_times([](auto times) { EXPECT_THAT(times.size(), Eq(mIterations)); });
+}
+
+// starts at 333hz, jumps to 200hz at frame 10
+TEST_F(VSyncDispatchRealtimeTest, fixed_jump) {
+    VRRStubTracker tracker(toNs(3ms));
+    VSyncDispatchTimerQueue dispatch(std::make_unique<Timer>(), tracker, mDispatchGroupThreshold);
+
+    RepeatingCallbackReceiver cb_receiver(dispatch, toNs(1ms));
+
+    auto jump_frame_counter = 0u;
+    auto constexpr jump_frame_at = 10u;
+    auto const on_each_frame = [&](nsecs_t last_known) {
+        if (jump_frame_counter++ == jump_frame_at) {
+            tracker.set_interval(toNs(5ms), last_known);
+        }
+    };
+    std::thread eventThread([&] { cb_receiver.repeatedly_schedule(mIterations, on_each_frame); });
+    eventThread.join();
+
+    cb_receiver.with_callback_times([](auto times) { EXPECT_THAT(times.size(), Eq(mIterations)); });
+}
+} // namespace android::scheduler
diff --git a/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp b/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp
new file mode 100644
index 0000000..d0c8090
--- /dev/null
+++ b/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp
@@ -0,0 +1,322 @@
+/*
+ * Copyright 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#undef LOG_TAG
+#define LOG_TAG "LibSurfaceFlingerUnittests"
+#define LOG_NDEBUG 0
+
+#include "Scheduler/VSyncPredictor.h"
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#include <algorithm>
+#include <chrono>
+#include <utility>
+
+using namespace testing;
+using namespace std::literals;
+
+namespace android::scheduler {
+
+MATCHER_P2(IsCloseTo, value, tolerance, "is within tolerance") {
+    return arg <= value + tolerance && value >= value - tolerance;
+}
+
+std::vector<nsecs_t> generateVsyncTimestamps(size_t count, nsecs_t period, nsecs_t bias) {
+    std::vector<nsecs_t> vsyncs(count);
+    std::generate(vsyncs.begin(), vsyncs.end(),
+                  [&, n = 0]() mutable { return n++ * period + bias; });
+    return vsyncs;
+}
+
+struct VSyncPredictorTest : testing::Test {
+    nsecs_t mNow = 0;
+    nsecs_t mPeriod = 1000;
+    static constexpr size_t kHistorySize = 10;
+    static constexpr size_t kMinimumSamplesForPrediction = 6;
+    static constexpr size_t kOutlierTolerancePercent = 25;
+    static constexpr nsecs_t mMaxRoundingError = 100;
+
+    VSyncPredictor tracker{mPeriod, kHistorySize, kMinimumSamplesForPrediction,
+                           kOutlierTolerancePercent};
+};
+
+TEST_F(VSyncPredictorTest, reportsAnticipatedPeriod) {
+    auto [slope, intercept] = tracker.getVSyncPredictionModel();
+
+    EXPECT_THAT(slope, Eq(mPeriod));
+    EXPECT_THAT(intercept, Eq(0));
+
+    auto const changedPeriod = 2000;
+    tracker.setPeriod(changedPeriod);
+    std::tie(slope, intercept) = tracker.getVSyncPredictionModel();
+    EXPECT_THAT(slope, Eq(changedPeriod));
+    EXPECT_THAT(intercept, Eq(0));
+}
+
+TEST_F(VSyncPredictorTest, reportsSamplesNeededWhenHasNoDataPoints) {
+    for (auto i = 0u; i < kMinimumSamplesForPrediction; i++) {
+        EXPECT_TRUE(tracker.needsMoreSamples(mNow += mPeriod));
+        tracker.addVsyncTimestamp(mNow);
+    }
+    EXPECT_FALSE(tracker.needsMoreSamples(mNow));
+}
+
+TEST_F(VSyncPredictorTest, reportsSamplesNeededAfterExplicitRateChange) {
+    for (auto i = 0u; i < kMinimumSamplesForPrediction; i++) {
+        tracker.addVsyncTimestamp(mNow += mPeriod);
+    }
+    EXPECT_FALSE(tracker.needsMoreSamples(mNow));
+
+    auto const changedPeriod = mPeriod * 2;
+    tracker.setPeriod(changedPeriod);
+    EXPECT_TRUE(tracker.needsMoreSamples(mNow));
+
+    for (auto i = 0u; i < kMinimumSamplesForPrediction; i++) {
+        EXPECT_TRUE(tracker.needsMoreSamples(mNow += changedPeriod));
+        tracker.addVsyncTimestamp(mNow);
+    }
+    EXPECT_FALSE(tracker.needsMoreSamples(mNow));
+}
+
+TEST_F(VSyncPredictorTest, transitionsToModelledPointsAfterSynthetic) {
+    auto last = mNow;
+    auto const bias = 10;
+    for (auto i = 0u; i < kMinimumSamplesForPrediction; i++) {
+        EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(last + mPeriod));
+        mNow += mPeriod - bias;
+        last = mNow;
+        tracker.addVsyncTimestamp(mNow);
+        mNow += bias;
+    }
+
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + mPeriod - bias));
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 100), Eq(mNow + mPeriod - bias));
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 990), Eq(mNow + 2 * mPeriod - bias));
+}
+
+TEST_F(VSyncPredictorTest, uponNotifiedOfInaccuracyUsesSynthetic) {
+    auto const slightlyLessPeriod = mPeriod - 10;
+    auto const changedPeriod = mPeriod - 1;
+    for (auto i = 0u; i < kMinimumSamplesForPrediction; i++) {
+        tracker.addVsyncTimestamp(mNow += slightlyLessPeriod);
+    }
+
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + slightlyLessPeriod));
+    tracker.setPeriod(changedPeriod);
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + changedPeriod));
+}
+
+TEST_F(VSyncPredictorTest, adaptsToFenceTimelines_60hzHighVariance) {
+    // these are precomputed simulated 16.6s vsyncs with uniform distribution +/- 1.6ms error
+    std::vector<nsecs_t> const simulatedVsyncs{
+            15492949,  32325658,  49534984,  67496129,  84652891,
+            100332564, 117737004, 132125931, 149291099, 165199602,
+    };
+    auto constexpr idealPeriod = 16600000;
+    auto constexpr expectedPeriod = 16639242;
+    auto constexpr expectedIntercept = 1049341;
+
+    tracker.setPeriod(idealPeriod);
+    for (auto const& timestamp : simulatedVsyncs) {
+        tracker.addVsyncTimestamp(timestamp);
+    }
+    auto [slope, intercept] = tracker.getVSyncPredictionModel();
+    EXPECT_THAT(slope, IsCloseTo(expectedPeriod, mMaxRoundingError));
+    EXPECT_THAT(intercept, IsCloseTo(expectedIntercept, mMaxRoundingError));
+}
+
+TEST_F(VSyncPredictorTest, adaptsToFenceTimelines_90hzLowVariance) {
+    // these are precomputed simulated 11.1 vsyncs with uniform distribution +/- 1ms error
+    std::vector<nsecs_t> const simulatedVsyncs{
+            11167047, 22603464, 32538479, 44938134, 56321268,
+            66730346, 78062637, 88171429, 99707843, 111397621,
+    };
+    auto idealPeriod = 11110000;
+    auto expectedPeriod = 11089413;
+    auto expectedIntercept = 94421;
+
+    tracker.setPeriod(idealPeriod);
+    for (auto const& timestamp : simulatedVsyncs) {
+        tracker.addVsyncTimestamp(timestamp);
+    }
+    auto [slope, intercept] = tracker.getVSyncPredictionModel();
+    EXPECT_THAT(slope, IsCloseTo(expectedPeriod, mMaxRoundingError));
+    EXPECT_THAT(intercept, IsCloseTo(expectedIntercept, mMaxRoundingError));
+}
+
+TEST_F(VSyncPredictorTest, adaptsToFenceTimelinesDiscontinuous_22hzLowVariance) {
+    // these are 11.1s vsyncs with low variance, randomly computed, between -1 and 1ms
+    std::vector<nsecs_t> const simulatedVsyncs{
+            45259463,   // 0
+            91511026,   // 1
+            136307650,  // 2
+            1864501714, // 40
+            1908641034, // 41
+            1955278544, // 42
+            4590180096, // 100
+            4681594994, // 102
+            5499224734, // 120
+            5591378272, // 122
+    };
+    auto idealPeriod = 45454545;
+    auto expectedPeriod = 45450152;
+    auto expectedIntercept = 469647;
+
+    tracker.setPeriod(idealPeriod);
+    for (auto const& timestamp : simulatedVsyncs) {
+        tracker.addVsyncTimestamp(timestamp);
+    }
+    auto [slope, intercept] = tracker.getVSyncPredictionModel();
+    EXPECT_THAT(slope, IsCloseTo(expectedPeriod, mMaxRoundingError));
+    EXPECT_THAT(intercept, IsCloseTo(expectedIntercept, mMaxRoundingError));
+}
+
+TEST_F(VSyncPredictorTest, againstOutliersDiscontinuous_500hzLowVariance) {
+    std::vector<nsecs_t> const simulatedVsyncs{
+            1992548,    // 0
+            4078038,    // 1
+            6165794,    // 2
+            7958171,    // 3
+            10193537,   // 4
+            2401840200, // 1200
+            2403000000, // an outlier that should be excluded (1201 and a half)
+            2405803629, // 1202
+            2408028599, // 1203
+            2410121051, // 1204
+    };
+    auto idealPeriod = 2000000;
+    auto expectedPeriod = 1999892;
+    auto expectedIntercept = 175409;
+
+    tracker.setPeriod(idealPeriod);
+    for (auto const& timestamp : simulatedVsyncs) {
+        tracker.addVsyncTimestamp(timestamp);
+    }
+
+    auto [slope, intercept] = tracker.getVSyncPredictionModel();
+    EXPECT_THAT(slope, IsCloseTo(expectedPeriod, mMaxRoundingError));
+    EXPECT_THAT(intercept, IsCloseTo(expectedIntercept, mMaxRoundingError));
+}
+
+TEST_F(VSyncPredictorTest, handlesVsyncChange) {
+    auto const fastPeriod = 100;
+    auto const fastTimeBase = 100;
+    auto const slowPeriod = 400;
+    auto const slowTimeBase = 800;
+    auto const simulatedVsyncsFast =
+            generateVsyncTimestamps(kMinimumSamplesForPrediction, fastPeriod, fastTimeBase);
+    auto const simulatedVsyncsSlow =
+            generateVsyncTimestamps(kMinimumSamplesForPrediction, slowPeriod, slowTimeBase);
+
+    tracker.setPeriod(fastPeriod);
+    for (auto const& timestamp : simulatedVsyncsFast) {
+        tracker.addVsyncTimestamp(timestamp);
+    }
+
+    auto const mMaxRoundingError = 100;
+    auto [slope, intercept] = tracker.getVSyncPredictionModel();
+    EXPECT_THAT(slope, IsCloseTo(fastPeriod, mMaxRoundingError));
+    EXPECT_THAT(intercept, IsCloseTo(0, mMaxRoundingError));
+
+    tracker.setPeriod(slowPeriod);
+    for (auto const& timestamp : simulatedVsyncsSlow) {
+        tracker.addVsyncTimestamp(timestamp);
+    }
+    std::tie(slope, intercept) = tracker.getVSyncPredictionModel();
+    EXPECT_THAT(slope, IsCloseTo(slowPeriod, mMaxRoundingError));
+    EXPECT_THAT(intercept, IsCloseTo(0, mMaxRoundingError));
+}
+
+TEST_F(VSyncPredictorTest, willBeAccurateUsingPriorResultsForRate) {
+    auto const fastPeriod = 101000;
+    auto const fastTimeBase = fastPeriod - 500;
+    auto const fastPeriod2 = 99000;
+
+    auto const slowPeriod = 400000;
+    auto const slowTimeBase = 800000 - 201;
+    auto const simulatedVsyncsFast =
+            generateVsyncTimestamps(kMinimumSamplesForPrediction, fastPeriod, fastTimeBase);
+    auto const simulatedVsyncsSlow =
+            generateVsyncTimestamps(kMinimumSamplesForPrediction, slowPeriod, slowTimeBase);
+    auto const simulatedVsyncsFast2 =
+            generateVsyncTimestamps(kMinimumSamplesForPrediction, fastPeriod2, fastTimeBase);
+
+    auto idealPeriod = 100000;
+    tracker.setPeriod(idealPeriod);
+    for (auto const& timestamp : simulatedVsyncsFast) {
+        tracker.addVsyncTimestamp(timestamp);
+    }
+    auto [slope, intercept] = tracker.getVSyncPredictionModel();
+    EXPECT_THAT(slope, Eq(fastPeriod));
+    EXPECT_THAT(intercept, Eq(0));
+
+    tracker.setPeriod(slowPeriod);
+    for (auto const& timestamp : simulatedVsyncsSlow) {
+        tracker.addVsyncTimestamp(timestamp);
+    }
+
+    // we had a model for 100ns mPeriod before, use that until the new samples are
+    // sufficiently built up
+    tracker.setPeriod(idealPeriod);
+    std::tie(slope, intercept) = tracker.getVSyncPredictionModel();
+    EXPECT_THAT(slope, Eq(fastPeriod));
+    EXPECT_THAT(intercept, Eq(0));
+
+    for (auto const& timestamp : simulatedVsyncsFast2) {
+        tracker.addVsyncTimestamp(timestamp);
+    }
+    std::tie(slope, intercept) = tracker.getVSyncPredictionModel();
+    EXPECT_THAT(slope, Eq(fastPeriod2));
+    EXPECT_THAT(intercept, Eq(0));
+}
+
+TEST_F(VSyncPredictorTest, willBecomeInaccurateAfterA_longTimeWithNoSamples) {
+    auto const simulatedVsyncs = generateVsyncTimestamps(kMinimumSamplesForPrediction, mPeriod, 0);
+
+    for (auto const& timestamp : simulatedVsyncs) {
+        tracker.addVsyncTimestamp(timestamp);
+    }
+    auto const mNow = *simulatedVsyncs.rbegin();
+    EXPECT_FALSE(tracker.needsMoreSamples(mNow));
+
+    // TODO: would be better to decay this as a result of the variance of the samples
+    static auto constexpr aLongTimeOut = 1000000000;
+    EXPECT_TRUE(tracker.needsMoreSamples(mNow + aLongTimeOut));
+}
+
+TEST_F(VSyncPredictorTest, idealModelPredictionsBeforeRegressionModelIsBuilt) {
+    auto const simulatedVsyncs =
+            generateVsyncTimestamps(kMinimumSamplesForPrediction + 1, mPeriod, 0);
+    nsecs_t const mNow = 0;
+    EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mPeriod));
+
+    nsecs_t const aBitOfTime = 422;
+
+    for (auto i = 0; i < kMinimumSamplesForPrediction; i++) {
+        tracker.addVsyncTimestamp(simulatedVsyncs[i]);
+        EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(simulatedVsyncs[i] + aBitOfTime),
+                    Eq(mPeriod + simulatedVsyncs[i]));
+    }
+
+    for (auto i = kMinimumSamplesForPrediction; i < simulatedVsyncs.size(); i++) {
+        tracker.addVsyncTimestamp(simulatedVsyncs[i]);
+        EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(simulatedVsyncs[i] + aBitOfTime),
+                    Eq(mPeriod + simulatedVsyncs[i]));
+    }
+}
+
+} // namespace android::scheduler