SF: reduce latency when switching low to high render rate
Bug: 328086969
Test: presubmit
Change-Id: I5aa1863d7c93d01ffd5c57182b1e085cb52183fa
diff --git a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
index e69410b..2d3796a 100644
--- a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
@@ -57,6 +57,11 @@
using LayerHierarchyBuilder = surfaceflinger::frontend::LayerHierarchyBuilder;
using RequestedLayerState = surfaceflinger::frontend::RequestedLayerState;
+class ZeroClock : public Clock {
+public:
+ nsecs_t now() const override { return 0; }
+};
+
class SchedulerTest : public testing::Test {
protected:
class MockEventThreadConnection : public android::EventThreadConnection {
@@ -564,7 +569,7 @@
hal::VrrConfig{.minFrameIntervalNs = static_cast<int32_t>(
frameRate.getPeriodNsecs())}));
std::shared_ptr<VSyncPredictor> vrrTracker =
- std::make_shared<VSyncPredictor>(std::make_unique<SystemClock>(), kMode, kHistorySize,
+ std::make_shared<VSyncPredictor>(std::make_unique<ZeroClock>(), kMode, kHistorySize,
kMinimumSamplesForPrediction,
kOutlierTolerancePercent);
std::shared_ptr<RefreshRateSelector> vrrSelectorPtr =
@@ -600,15 +605,12 @@
vrrSelectorPtr->setActiveMode(kMode->getId(), frameRate);
scheduler.setRenderRate(kMode->getPhysicalDisplayId(), frameRate);
- // Set 4000 as vsync seq #0
- vrrTracker->nextAnticipatedVSyncTimeFrom(3700);
-
EXPECT_EQ(Fps::fromPeriodNsecs(2000),
scheduler.getNextFrameInterval(kMode->getPhysicalDisplayId(),
- TimePoint::fromNs(4000)));
+ TimePoint::fromNs(4500)));
EXPECT_EQ(Fps::fromPeriodNsecs(2000),
scheduler.getNextFrameInterval(kMode->getPhysicalDisplayId(),
- TimePoint::fromNs(6000)));
+ TimePoint::fromNs(6500)));
}
TEST_F(SchedulerTest, resyncAllToHardwareVsync) FTL_FAKE_GUARD(kMainThreadContext) {
diff --git a/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp b/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp
index 1394c55..b58ac66 100644
--- a/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp
+++ b/services/surfaceflinger/tests/unittests/VSyncPredictorTest.cpp
@@ -622,13 +622,13 @@
tracker.setRenderRate(Fps::fromPeriodNsecs(3 * mPeriod));
- EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + mPeriod));
- EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 100), Eq(mNow + mPeriod));
- EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 1100), Eq(mNow + 4 * mPeriod));
- EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 2100), Eq(mNow + 4 * mPeriod));
- EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 3100), Eq(mNow + 4 * mPeriod));
- EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 4100), Eq(mNow + 7 * mPeriod));
- EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 5100), Eq(mNow + 7 * mPeriod));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow), Eq(mNow + 3 * mPeriod));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 100), Eq(mNow + 3 * mPeriod));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 1100), Eq(mNow + 3 * mPeriod));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 2100), Eq(mNow + 3 * mPeriod));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 3100), Eq(mNow + 6 * mPeriod));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 4100), Eq(mNow + 6 * mPeriod));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 5100), Eq(mNow + 6 * mPeriod));
}
TEST_F(VSyncPredictorTest, setRenderRateIsIgnoredIfNotDivisor) {
@@ -651,6 +651,119 @@
EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(mNow + 5100), Eq(mNow + 6 * mPeriod));
}
+TEST_F(VSyncPredictorTest, setRenderRateHighIsAppliedImmediatley) {
+ SET_FLAG_FOR_TEST(flags::vrr_config, true);
+
+ const int32_t kGroup = 0;
+ const auto kResolution = ui::Size(1920, 1080);
+ const auto vsyncRate = Fps::fromPeriodNsecs(500);
+ const auto minFrameRate = Fps::fromPeriodNsecs(1000);
+ hal::VrrConfig vrrConfig;
+ vrrConfig.minFrameIntervalNs = minFrameRate.getPeriodNsecs();
+ const ftl::NonNull<DisplayModePtr> kMode =
+ ftl::as_non_null(createDisplayModeBuilder(DisplayModeId(0), vsyncRate, kGroup,
+ kResolution, DEFAULT_DISPLAY_ID)
+ .setVrrConfig(std::move(vrrConfig))
+ .build());
+
+ VSyncPredictor vrrTracker{std::make_unique<ClockWrapper>(mClock), kMode, kHistorySize,
+ kMinimumSamplesForPrediction, kOutlierTolerancePercent};
+
+ vrrTracker.setRenderRate(Fps::fromPeriodNsecs(1000));
+ vrrTracker.addVsyncTimestamp(0);
+ EXPECT_EQ(1000, vrrTracker.nextAnticipatedVSyncTimeFrom(700));
+ EXPECT_EQ(2000, vrrTracker.nextAnticipatedVSyncTimeFrom(1000, 1000));
+
+ // commit to a vsync in the future
+ EXPECT_EQ(6000, vrrTracker.nextAnticipatedVSyncTimeFrom(5000, 5000));
+
+ vrrTracker.setRenderRate(Fps::fromPeriodNsecs(2000));
+ EXPECT_EQ(5000, vrrTracker.nextAnticipatedVSyncTimeFrom(4000, 4000));
+ EXPECT_EQ(6000, vrrTracker.nextAnticipatedVSyncTimeFrom(5000, 5000));
+ EXPECT_EQ(8000, vrrTracker.nextAnticipatedVSyncTimeFrom(6000, 6000));
+
+ EXPECT_EQ(12000, vrrTracker.nextAnticipatedVSyncTimeFrom(10000, 10000));
+
+ vrrTracker.setRenderRate(Fps::fromPeriodNsecs(3500));
+ EXPECT_EQ(5000, vrrTracker.nextAnticipatedVSyncTimeFrom(4000, 4000));
+ EXPECT_EQ(6000, vrrTracker.nextAnticipatedVSyncTimeFrom(5000, 5000));
+ EXPECT_EQ(8000, vrrTracker.nextAnticipatedVSyncTimeFrom(6000, 6000));
+ EXPECT_EQ(10000, vrrTracker.nextAnticipatedVSyncTimeFrom(8000, 8000));
+ EXPECT_EQ(12000, vrrTracker.nextAnticipatedVSyncTimeFrom(10000, 10000));
+ EXPECT_EQ(15500, vrrTracker.nextAnticipatedVSyncTimeFrom(12000, 12000));
+ EXPECT_EQ(19000, vrrTracker.nextAnticipatedVSyncTimeFrom(15500, 15500));
+
+ vrrTracker.setRenderRate(Fps::fromPeriodNsecs(2500));
+ EXPECT_EQ(5000, vrrTracker.nextAnticipatedVSyncTimeFrom(4000, 4000));
+ EXPECT_EQ(6000, vrrTracker.nextAnticipatedVSyncTimeFrom(5000, 5000));
+ EXPECT_EQ(8000, vrrTracker.nextAnticipatedVSyncTimeFrom(6000, 6000));
+ EXPECT_EQ(10000, vrrTracker.nextAnticipatedVSyncTimeFrom(8000, 8000));
+ EXPECT_EQ(12000, vrrTracker.nextAnticipatedVSyncTimeFrom(10000, 10000));
+ EXPECT_EQ(15500, vrrTracker.nextAnticipatedVSyncTimeFrom(12000, 12000));
+ EXPECT_EQ(19000, vrrTracker.nextAnticipatedVSyncTimeFrom(15500, 15500));
+ EXPECT_EQ(21500, vrrTracker.nextAnticipatedVSyncTimeFrom(19000, 19000));
+
+ vrrTracker.setRenderRate(Fps::fromPeriodNsecs(1000));
+ EXPECT_EQ(5000, vrrTracker.nextAnticipatedVSyncTimeFrom(4000, 4000));
+ EXPECT_EQ(6000, vrrTracker.nextAnticipatedVSyncTimeFrom(5000, 5000));
+ EXPECT_EQ(7000, vrrTracker.nextAnticipatedVSyncTimeFrom(6000, 6000));
+ EXPECT_EQ(9000, vrrTracker.nextAnticipatedVSyncTimeFrom(8000, 8000));
+ EXPECT_EQ(11000, vrrTracker.nextAnticipatedVSyncTimeFrom(10000, 10000));
+ EXPECT_EQ(13000, vrrTracker.nextAnticipatedVSyncTimeFrom(12000, 12000));
+ EXPECT_EQ(17000, vrrTracker.nextAnticipatedVSyncTimeFrom(15500, 15500));
+ EXPECT_EQ(20000, vrrTracker.nextAnticipatedVSyncTimeFrom(19000, 19000));
+}
+
+TEST_F(VSyncPredictorTest, selectsClosestVsyncAfterInactivity) {
+ SET_FLAG_FOR_TEST(flags::vrr_config, true);
+
+ const int32_t kGroup = 0;
+ const auto kResolution = ui::Size(1920, 1080);
+ const auto vsyncRate = Fps::fromPeriodNsecs(500);
+ const auto minFrameRate = Fps::fromPeriodNsecs(1000);
+ hal::VrrConfig vrrConfig;
+ vrrConfig.minFrameIntervalNs = minFrameRate.getPeriodNsecs();
+ const ftl::NonNull<DisplayModePtr> kMode =
+ ftl::as_non_null(createDisplayModeBuilder(DisplayModeId(0), vsyncRate, kGroup,
+ kResolution, DEFAULT_DISPLAY_ID)
+ .setVrrConfig(std::move(vrrConfig))
+ .build());
+
+ VSyncPredictor vrrTracker{std::make_unique<ClockWrapper>(mClock), kMode, kHistorySize,
+ kMinimumSamplesForPrediction, kOutlierTolerancePercent};
+
+ vrrTracker.setRenderRate(Fps::fromPeriodNsecs(5000));
+ vrrTracker.addVsyncTimestamp(0);
+ EXPECT_EQ(5000, vrrTracker.nextAnticipatedVSyncTimeFrom(4700));
+ EXPECT_EQ(10000, vrrTracker.nextAnticipatedVSyncTimeFrom(5000, 5000));
+
+ mClock->setNow(50000);
+ EXPECT_EQ(50500, vrrTracker.nextAnticipatedVSyncTimeFrom(50000, 10000));
+}
+
+TEST_F(VSyncPredictorTest, returnsCorrectVsyncWhenLastIsNot) {
+ SET_FLAG_FOR_TEST(flags::vrr_config, true);
+
+ const int32_t kGroup = 0;
+ const auto kResolution = ui::Size(1920, 1080);
+ const auto vsyncRate = Fps::fromPeriodNsecs(500);
+ const auto minFrameRate = Fps::fromPeriodNsecs(1000);
+ hal::VrrConfig vrrConfig;
+ vrrConfig.minFrameIntervalNs = minFrameRate.getPeriodNsecs();
+ const ftl::NonNull<DisplayModePtr> kMode =
+ ftl::as_non_null(createDisplayModeBuilder(DisplayModeId(0), vsyncRate, kGroup,
+ kResolution, DEFAULT_DISPLAY_ID)
+ .setVrrConfig(std::move(vrrConfig))
+ .build());
+
+ VSyncPredictor vrrTracker{std::make_unique<ClockWrapper>(mClock), kMode, kHistorySize,
+ kMinimumSamplesForPrediction, kOutlierTolerancePercent};
+
+ vrrTracker.setRenderRate(Fps::fromPeriodNsecs(1000));
+ vrrTracker.addVsyncTimestamp(0);
+ EXPECT_EQ(2000, vrrTracker.nextAnticipatedVSyncTimeFrom(1234, 1234));
+}
+
TEST_F(VSyncPredictorTest, adjustsVrrTimeline) {
SET_FLAG_FOR_TEST(flags::vrr_config, true);
@@ -743,17 +856,18 @@
EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(1), Eq(1000));
EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(5001), Eq(6000));
EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(6001), Eq(7000));
- EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(7001), Eq(8000));
- EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(8001), Eq(10000));
- EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(9001), Eq(10000));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(7001), Eq(9000));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(8001), Eq(9000));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(9001), Eq(11000));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(10001), Eq(11000));
tracker.setRenderRate(Fps::fromPeriodNsecs(3000));
EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(1), Eq(1000));
EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(5001), Eq(6000));
EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(6001), Eq(7000));
- EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(7001), Eq(8000));
- EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(8001), Eq(10000));
- EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(9001), Eq(10000));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(7001), Eq(9000));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(8001), Eq(9000));
+ EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(9001), Eq(11000));
EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(10001), Eq(11000));
EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(11001), Eq(14000));
EXPECT_THAT(tracker.nextAnticipatedVSyncTimeFrom(12001), Eq(14000));