diff --git a/services/powermanager/PowerHalWrapper.cpp b/services/powermanager/PowerHalWrapper.cpp
index 95f8623..4a711ca 100644
--- a/services/powermanager/PowerHalWrapper.cpp
+++ b/services/powermanager/PowerHalWrapper.cpp
@@ -29,12 +29,20 @@
 // -------------------------------------------------------------------------------------------------
 
 inline HalResult toHalResult(const binder::Status& result) {
-    return result.isOk() ? HalResult::SUCCESSFUL : HalResult::FAILED;
+    if (result.isOk()) {
+        return HalResult::SUCCESSFUL;
+    }
+    ALOGE("Power HAL request failed: %s", result.toString8().c_str());
+    return HalResult::FAILED;
 }
 
 template <typename T>
 inline HalResult toHalResult(const hardware::Return<T>& result) {
-    return result.isOk() ? HalResult::SUCCESSFUL : HalResult::FAILED;
+    if (result.isOk()) {
+        return HalResult::SUCCESSFUL;
+    }
+    ALOGE("Power HAL request failed: %s", result.description().c_str());
+    return HalResult::FAILED;
 }
 
 // -------------------------------------------------------------------------------------------------
@@ -117,8 +125,8 @@
         bool isSupported = false;
         auto isSupportedRet = mHandle->isBoostSupported(boost, &isSupported);
         if (!isSupportedRet.isOk()) {
-            ALOGV("Skipped setBoost %s because Power HAL is not available to check support",
-                  toString(boost).c_str());
+            ALOGE("Skipped setBoost %s because check support failed with: %s",
+                  toString(boost).c_str(), isSupportedRet.toString8().c_str());
             return HalResult::FAILED;
         }
 
@@ -148,8 +156,8 @@
         bool isSupported = false;
         auto isSupportedRet = mHandle->isModeSupported(mode, &isSupported);
         if (!isSupportedRet.isOk()) {
-            ALOGV("Skipped setMode %s because Power HAL is not available to check support",
-                  toString(mode).c_str());
+            ALOGE("Skipped setMode %s because check support failed with: %s",
+                  toString(mode).c_str(), isSupportedRet.toString8().c_str());
             return HalResult::FAILED;
         }
 
diff --git a/services/powermanager/benchmarks/Android.bp b/services/powermanager/benchmarks/Android.bp
index 5975269..4c5d508 100644
--- a/services/powermanager/benchmarks/Android.bp
+++ b/services/powermanager/benchmarks/Android.bp
@@ -31,6 +31,9 @@
         "android.hardware.power@1.1",
         "android.hardware.power-cpp",
     ],
+    static_libs: [
+        "libtestUtil",
+    ],
     cflags: [
         "-Wall",
         "-Werror",
diff --git a/services/powermanager/benchmarks/PowerHalAidlBenchmarks.cpp b/services/powermanager/benchmarks/PowerHalAidlBenchmarks.cpp
index a6dad51..1004828 100644
--- a/services/powermanager/benchmarks/PowerHalAidlBenchmarks.cpp
+++ b/services/powermanager/benchmarks/PowerHalAidlBenchmarks.cpp
@@ -19,50 +19,78 @@
 #include <android/hardware/power/Boost.h>
 #include <android/hardware/power/IPower.h>
 #include <android/hardware/power/Mode.h>
-
 #include <benchmark/benchmark.h>
-
 #include <binder/IServiceManager.h>
+#include <testUtil.h>
+#include <chrono>
 
 using android::hardware::power::Boost;
 using android::hardware::power::IPower;
 using android::hardware::power::Mode;
+using std::chrono::microseconds;
 
 using namespace android;
+using namespace std::chrono_literals;
+
+// Values from Boost.aidl and Mode.aidl.
+static constexpr int64_t FIRST_BOOST = static_cast<int64_t>(Boost::INTERACTION);
+static constexpr int64_t LAST_BOOST = static_cast<int64_t>(Boost::CAMERA_SHOT);
+static constexpr int64_t FIRST_MODE = static_cast<int64_t>(Mode::DOUBLE_TAP_TO_WAKE);
+static constexpr int64_t LAST_MODE = static_cast<int64_t>(Mode::CAMERA_STREAMING_HIGH);
+
+// Delay between oneway method calls to avoid overflowing the binder buffers.
+static constexpr microseconds ONEWAY_API_DELAY = 100us;
 
 template <class R, class... Args0, class... Args1>
-static void runBenchmark(benchmark::State& state, R (IPower::*fn)(Args0...), Args1&&... args1) {
+static void runBenchmark(benchmark::State& state, microseconds delay, R (IPower::*fn)(Args0...),
+                         Args1&&... args1) {
     sp<IPower> hal = waitForVintfService<IPower>();
 
     if (hal == nullptr) {
-        ALOGI("Power HAL AIDL not available, skipping test...");
+        ALOGI("Power HAL not available, skipping test...");
+        return;
+    }
+
+    binder::Status ret = (*hal.*fn)(std::forward<Args1>(args1)...);
+    if (ret.exceptionCode() == binder::Status::Exception::EX_UNSUPPORTED_OPERATION) {
+        ALOGI("Power HAL does not support this operation, skipping test...");
         return;
     }
 
     while (state.KeepRunning()) {
-        (*hal.*fn)(std::forward<Args1>(args1)...);
+        ret = (*hal.*fn)(std::forward<Args1>(args1)...);
+        state.PauseTiming();
+        if (!ret.isOk()) state.SkipWithError(ret.toString8().c_str());
+        if (delay > 0us) {
+            testDelaySpin(std::chrono::duration_cast<std::chrono::duration<float>>(delay).count());
+        }
+        state.ResumeTiming();
     }
 }
 
 static void BM_PowerHalAidlBenchmarks_isBoostSupported(benchmark::State& state) {
     bool isSupported;
-    runBenchmark(state, &IPower::isBoostSupported, Boost::INTERACTION, &isSupported);
+    Boost boost = static_cast<Boost>(state.range(0));
+    runBenchmark(state, 0us, &IPower::isBoostSupported, boost, &isSupported);
 }
 
 static void BM_PowerHalAidlBenchmarks_isModeSupported(benchmark::State& state) {
     bool isSupported;
-    runBenchmark(state, &IPower::isModeSupported, Mode::INTERACTIVE, &isSupported);
+    Mode mode = static_cast<Mode>(state.range(0));
+    runBenchmark(state, 0us, &IPower::isModeSupported, mode, &isSupported);
 }
 
 static void BM_PowerHalAidlBenchmarks_setBoost(benchmark::State& state) {
-    runBenchmark(state, &IPower::setBoost, Boost::INTERACTION, 0);
+    Boost boost = static_cast<Boost>(state.range(0));
+    runBenchmark(state, ONEWAY_API_DELAY, &IPower::setBoost, boost, 1);
 }
 
 static void BM_PowerHalAidlBenchmarks_setMode(benchmark::State& state) {
-    runBenchmark(state, &IPower::setMode, Mode::INTERACTIVE, false);
+    Mode mode = static_cast<Mode>(state.range(0));
+    runBenchmark(state, ONEWAY_API_DELAY, &IPower::setMode, mode, false);
 }
 
-BENCHMARK(BM_PowerHalAidlBenchmarks_isBoostSupported);
-BENCHMARK(BM_PowerHalAidlBenchmarks_isModeSupported);
-BENCHMARK(BM_PowerHalAidlBenchmarks_setBoost);
-BENCHMARK(BM_PowerHalAidlBenchmarks_setMode);
+BENCHMARK(BM_PowerHalAidlBenchmarks_isBoostSupported)->DenseRange(FIRST_BOOST, LAST_BOOST, 1);
+BENCHMARK(BM_PowerHalAidlBenchmarks_isModeSupported)->DenseRange(FIRST_MODE, LAST_MODE, 1);
+BENCHMARK(BM_PowerHalAidlBenchmarks_setBoost)->DenseRange(FIRST_BOOST, LAST_BOOST, 1);
+BENCHMARK(BM_PowerHalAidlBenchmarks_setMode)->DenseRange(FIRST_MODE, LAST_MODE, 1);
diff --git a/services/powermanager/benchmarks/PowerHalControllerBenchmarks.cpp b/services/powermanager/benchmarks/PowerHalControllerBenchmarks.cpp
index a3a1f4e..598080b 100644
--- a/services/powermanager/benchmarks/PowerHalControllerBenchmarks.cpp
+++ b/services/powermanager/benchmarks/PowerHalControllerBenchmarks.cpp
@@ -18,16 +18,58 @@
 
 #include <android/hardware/power/Boost.h>
 #include <android/hardware/power/Mode.h>
-
 #include <benchmark/benchmark.h>
-
 #include <powermanager/PowerHalController.h>
+#include <testUtil.h>
+#include <chrono>
 
 using android::hardware::power::Boost;
 using android::hardware::power::Mode;
+using android::power::HalResult;
 using android::power::PowerHalController;
 
 using namespace android;
+using namespace std::chrono_literals;
+
+// Values from Boost.aidl and Mode.aidl.
+static constexpr int64_t FIRST_BOOST = static_cast<int64_t>(Boost::INTERACTION);
+static constexpr int64_t LAST_BOOST = static_cast<int64_t>(Boost::CAMERA_SHOT);
+static constexpr int64_t FIRST_MODE = static_cast<int64_t>(Mode::DOUBLE_TAP_TO_WAKE);
+static constexpr int64_t LAST_MODE = static_cast<int64_t>(Mode::CAMERA_STREAMING_HIGH);
+
+// Delay between oneway method calls to avoid overflowing the binder buffers.
+static constexpr std::chrono::microseconds ONEWAY_API_DELAY = 100us;
+
+template <class... Args0, class... Args1>
+static void runBenchmark(benchmark::State& state, HalResult (PowerHalController::*fn)(Args0...),
+                         Args1&&... args1) {
+    while (state.KeepRunning()) {
+        PowerHalController controller;
+        HalResult ret = (controller.*fn)(std::forward<Args1>(args1)...);
+        state.PauseTiming();
+        if (ret == HalResult::FAILED) state.SkipWithError("Power HAL request failed");
+        state.ResumeTiming();
+    }
+}
+
+template <class... Args0, class... Args1>
+static void runCachedBenchmark(benchmark::State& state,
+                               HalResult (PowerHalController::*fn)(Args0...), Args1&&... args1) {
+    PowerHalController controller;
+    // First call out of test, to cache HAL service and isSupported result.
+    (controller.*fn)(std::forward<Args1>(args1)...);
+
+    while (state.KeepRunning()) {
+        HalResult ret = (controller.*fn)(std::forward<Args1>(args1)...);
+        state.PauseTiming();
+        if (ret == HalResult::FAILED) {
+            state.SkipWithError("Power HAL request failed");
+        }
+        testDelaySpin(
+                std::chrono::duration_cast<std::chrono::duration<float>>(ONEWAY_API_DELAY).count());
+        state.ResumeTiming();
+    }
+}
 
 static void BM_PowerHalControllerBenchmarks_init(benchmark::State& state) {
     while (state.KeepRunning()) {
@@ -47,42 +89,28 @@
 }
 
 static void BM_PowerHalControllerBenchmarks_setBoost(benchmark::State& state) {
-    while (state.KeepRunning()) {
-        PowerHalController controller;
-        controller.setBoost(Boost::INTERACTION, 0);
-    }
+    Boost boost = static_cast<Boost>(state.range(0));
+    runBenchmark(state, &PowerHalController::setBoost, boost, 0);
 }
 
 static void BM_PowerHalControllerBenchmarks_setBoostCached(benchmark::State& state) {
-    PowerHalController controller;
-    // First call out of test, to cache supported boost.
-    controller.setBoost(Boost::INTERACTION, 0);
-
-    while (state.KeepRunning()) {
-        controller.setBoost(Boost::INTERACTION, 0);
-    }
+    Boost boost = static_cast<Boost>(state.range(0));
+    runCachedBenchmark(state, &PowerHalController::setBoost, boost, 0);
 }
 
 static void BM_PowerHalControllerBenchmarks_setMode(benchmark::State& state) {
-    while (state.KeepRunning()) {
-        PowerHalController controller;
-        controller.setMode(Mode::INTERACTIVE, false);
-    }
+    Mode mode = static_cast<Mode>(state.range(0));
+    runBenchmark(state, &PowerHalController::setMode, mode, false);
 }
 
 static void BM_PowerHalControllerBenchmarks_setModeCached(benchmark::State& state) {
-    PowerHalController controller;
-    // First call out of test, to cache supported mode.
-    controller.setMode(Mode::INTERACTIVE, false);
-
-    while (state.KeepRunning()) {
-        controller.setMode(Mode::INTERACTIVE, false);
-    }
+    Mode mode = static_cast<Mode>(state.range(0));
+    runCachedBenchmark(state, &PowerHalController::setMode, mode, false);
 }
 
 BENCHMARK(BM_PowerHalControllerBenchmarks_init);
 BENCHMARK(BM_PowerHalControllerBenchmarks_initCached);
-BENCHMARK(BM_PowerHalControllerBenchmarks_setBoost);
-BENCHMARK(BM_PowerHalControllerBenchmarks_setBoostCached);
-BENCHMARK(BM_PowerHalControllerBenchmarks_setMode);
-BENCHMARK(BM_PowerHalControllerBenchmarks_setModeCached);
+BENCHMARK(BM_PowerHalControllerBenchmarks_setBoost)->DenseRange(FIRST_BOOST, LAST_BOOST, 1);
+BENCHMARK(BM_PowerHalControllerBenchmarks_setBoostCached)->DenseRange(FIRST_BOOST, LAST_BOOST, 1);
+BENCHMARK(BM_PowerHalControllerBenchmarks_setMode)->DenseRange(FIRST_MODE, LAST_MODE, 1);
+BENCHMARK(BM_PowerHalControllerBenchmarks_setModeCached)->DenseRange(FIRST_MODE, LAST_MODE, 1);
diff --git a/services/powermanager/benchmarks/PowerHalHidlBenchmarks.cpp b/services/powermanager/benchmarks/PowerHalHidlBenchmarks.cpp
index 5542ac4..97e026b 100644
--- a/services/powermanager/benchmarks/PowerHalHidlBenchmarks.cpp
+++ b/services/powermanager/benchmarks/PowerHalHidlBenchmarks.cpp
@@ -20,23 +20,34 @@
 #include <android/hardware/power/Boost.h>
 #include <android/hardware/power/IPower.h>
 #include <android/hardware/power/Mode.h>
-
 #include <benchmark/benchmark.h>
-
 #include <hardware/power.h>
 #include <hardware_legacy/power.h>
+#include <testUtil.h>
+#include <chrono>
 
+using android::hardware::Return;
 using android::hardware::power::Boost;
 using android::hardware::power::Mode;
 using android::hardware::power::V1_0::Feature;
 using android::hardware::power::V1_0::PowerHint;
+using std::chrono::microseconds;
 using IPower1_0 = android::hardware::power::V1_0::IPower;
 using IPower1_1 = android::hardware::power::V1_1::IPower;
 
 using namespace android;
+using namespace std::chrono_literals;
+
+// Values from types.hal from versions 1.0 to 1.3.
+static constexpr int64_t FIRST_POWER_HINT = static_cast<int64_t>(PowerHint::VSYNC);
+static constexpr int64_t LAST_POWER_HINT = static_cast<int64_t>(PowerHint::LAUNCH);
+
+// Delay between oneway method calls to avoid overflowing the binder buffers.
+static constexpr microseconds ONEWAY_API_DELAY = 100us;
 
 template <class R, class I, class... Args0, class... Args1>
-static void runBenchmark(benchmark::State& state, R (I::*fn)(Args0...), Args1&&... args1) {
+static void runBenchmark(benchmark::State& state, microseconds delay, Return<R> (I::*fn)(Args0...),
+                         Args1&&... args1) {
     sp<I> hal = I::getService();
 
     if (hal == nullptr) {
@@ -45,27 +56,37 @@
     }
 
     while (state.KeepRunning()) {
-        (*hal.*fn)(std::forward<Args1>(args1)...);
+        Return<R> ret = (*hal.*fn)(std::forward<Args1>(args1)...);
+        state.PauseTiming();
+        if (!ret.isOk()) state.SkipWithError(ret.description().c_str());
+        if (delay > 0us) {
+            testDelaySpin(std::chrono::duration_cast<std::chrono::duration<float>>(delay).count());
+        }
+        state.ResumeTiming();
     }
 }
 
 static void BM_PowerHalHidlBenchmarks_setFeature(benchmark::State& state) {
-    runBenchmark(state, &IPower1_0::setFeature, Feature::POWER_FEATURE_DOUBLE_TAP_TO_WAKE, false);
+    runBenchmark(state, 0us, &IPower1_0::setFeature, Feature::POWER_FEATURE_DOUBLE_TAP_TO_WAKE,
+                 false);
 }
 
 static void BM_PowerHalHidlBenchmarks_setInteractive(benchmark::State& state) {
-    runBenchmark(state, &IPower1_0::setInteractive, false);
+    runBenchmark(state, 0us, &IPower1_0::setInteractive, false);
 }
 
 static void BM_PowerHalHidlBenchmarks_powerHint(benchmark::State& state) {
-    runBenchmark(state, &IPower1_0::powerHint, PowerHint::INTERACTION, 0);
+    PowerHint powerHint = static_cast<PowerHint>(state.range(0));
+    runBenchmark(state, 0us, &IPower1_0::powerHint, powerHint, 0);
 }
 
 static void BM_PowerHalHidlBenchmarks_powerHintAsync(benchmark::State& state) {
-    runBenchmark(state, &IPower1_1::powerHintAsync, PowerHint::INTERACTION, 0);
+    PowerHint powerHint = static_cast<PowerHint>(state.range(0));
+    runBenchmark(state, ONEWAY_API_DELAY, &IPower1_1::powerHintAsync, powerHint, 0);
 }
 
 BENCHMARK(BM_PowerHalHidlBenchmarks_setFeature);
 BENCHMARK(BM_PowerHalHidlBenchmarks_setInteractive);
-BENCHMARK(BM_PowerHalHidlBenchmarks_powerHint);
-BENCHMARK(BM_PowerHalHidlBenchmarks_powerHintAsync);
+BENCHMARK(BM_PowerHalHidlBenchmarks_powerHint)->DenseRange(FIRST_POWER_HINT, LAST_POWER_HINT, 1);
+BENCHMARK(BM_PowerHalHidlBenchmarks_powerHintAsync)
+        ->DenseRange(FIRST_POWER_HINT, LAST_POWER_HINT, 1);