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-rw-r--r--services/surfaceflinger/Scheduler/LayerInfo.cpp43
-rw-r--r--services/surfaceflinger/Scheduler/LayerInfo.h7
-rw-r--r--services/surfaceflinger/tests/unittests/LayerHistoryTest.cpp86
3 files changed, 125 insertions, 11 deletions
diff --git a/services/surfaceflinger/Scheduler/LayerInfo.cpp b/services/surfaceflinger/Scheduler/LayerInfo.cpp
index f9c9023bd9..0142ccd93f 100644
--- a/services/surfaceflinger/Scheduler/LayerInfo.cpp
+++ b/services/surfaceflinger/Scheduler/LayerInfo.cpp
@@ -77,12 +77,43 @@ bool LayerInfo::isFrameTimeValid(const FrameTimeData& frameTime) const {
bool LayerInfo::isFrequent(nsecs_t now) const {
using fps_approx_ops::operator>=;
- // If we know nothing about this layer we consider it as frequent as it might be the start
- // of an animation.
+ // If we know nothing about this layer (e.g. after touch event),
+ // we consider it as frequent as it might be the start of an animation.
if (mFrameTimes.size() < kFrequentLayerWindowSize) {
return true;
}
- return getFps(now) >= kMinFpsForFrequentLayer;
+
+ // Non-active layers are also infrequent
+ if (mLastUpdatedTime < getActiveLayerThreshold(now)) {
+ return false;
+ }
+
+ // We check whether we can classify this layer as frequent or infrequent:
+ // - frequent: a layer posted kFrequentLayerWindowSize within
+ // kMaxPeriodForFrequentLayerNs of each other.
+ // - infrequent: a layer posted kFrequentLayerWindowSize with longer
+ // gaps than kFrequentLayerWindowSize.
+ // If we can't determine the layer classification yet, we return the last
+ // classification.
+ bool isFrequent = true;
+ bool isInfrequent = true;
+ const auto n = mFrameTimes.size() - 1;
+ for (size_t i = 0; i < kFrequentLayerWindowSize - 1; i++) {
+ if (mFrameTimes[n - i].queueTime - mFrameTimes[n - i - 1].queueTime <
+ kMaxPeriodForFrequentLayerNs.count()) {
+ isInfrequent = false;
+ } else {
+ isFrequent = false;
+ }
+ }
+
+ if (isFrequent || isInfrequent) {
+ return isFrequent;
+ }
+
+ // If we can't determine whether the layer is frequent or not, we return
+ // the last known classification.
+ return !mLastRefreshRate.infrequent;
}
Fps LayerInfo::getFps(nsecs_t now) const {
@@ -235,14 +266,14 @@ LayerInfo::LayerVote LayerInfo::getRefreshRateVote(const RefreshRateSelector& se
if (isAnimating(now)) {
ATRACE_FORMAT_INSTANT("animating");
ALOGV("%s is animating", mName.c_str());
- mLastRefreshRate.animatingOrInfrequent = true;
+ mLastRefreshRate.animating = true;
return {LayerHistory::LayerVoteType::Max, Fps()};
}
if (!isFrequent(now)) {
ATRACE_FORMAT_INSTANT("infrequent");
ALOGV("%s is infrequent", mName.c_str());
- mLastRefreshRate.animatingOrInfrequent = true;
+ mLastRefreshRate.infrequent = true;
// Infrequent layers vote for mininal refresh rate for
// battery saving purposes and also to prevent b/135718869.
return {LayerHistory::LayerVoteType::Min, Fps()};
@@ -251,7 +282,7 @@ LayerInfo::LayerVote LayerInfo::getRefreshRateVote(const RefreshRateSelector& se
// If the layer was previously tagged as animating or infrequent, we clear
// the history as it is likely the layer just changed its behavior
// and we should not look at stale data
- if (mLastRefreshRate.animatingOrInfrequent) {
+ if (mLastRefreshRate.animating || mLastRefreshRate.infrequent) {
clearHistory(now);
}
diff --git a/services/surfaceflinger/Scheduler/LayerInfo.h b/services/surfaceflinger/Scheduler/LayerInfo.h
index a5ffbbecb5..93485be0a4 100644
--- a/services/surfaceflinger/Scheduler/LayerInfo.h
+++ b/services/surfaceflinger/Scheduler/LayerInfo.h
@@ -53,7 +53,7 @@ class LayerInfo {
// Layer is considered frequent if the earliest value in the window of most recent present times
// is within a threshold. If a layer is infrequent, its average refresh rate is disregarded in
// favor of a low refresh rate.
- static constexpr size_t kFrequentLayerWindowSize = 3;
+ static constexpr size_t kFrequentLayerWindowSize = 4;
static constexpr Fps kMinFpsForFrequentLayer = 10_Hz;
static constexpr auto kMaxPeriodForFrequentLayerNs =
std::chrono::nanoseconds(kMinFpsForFrequentLayer.getPeriodNsecs()) + 1ms;
@@ -214,7 +214,10 @@ private:
Fps reported;
// Whether the last reported rate for LayerInfo::getRefreshRate()
// was due to animation or infrequent updates
- bool animatingOrInfrequent = false;
+ bool animating = false;
+ // Whether the last reported rate for LayerInfo::getRefreshRate()
+ // was due to infrequent updates
+ bool infrequent = false;
};
// Class to store past calculated refresh rate and determine whether
diff --git a/services/surfaceflinger/tests/unittests/LayerHistoryTest.cpp b/services/surfaceflinger/tests/unittests/LayerHistoryTest.cpp
index 979924af58..8397f8d0ce 100644
--- a/services/surfaceflinger/tests/unittests/LayerHistoryTest.cpp
+++ b/services/surfaceflinger/tests/unittests/LayerHistoryTest.cpp
@@ -51,8 +51,6 @@ protected:
static constexpr auto MAX_FREQUENT_LAYER_PERIOD_NS = LayerInfo::kMaxPeriodForFrequentLayerNs;
static constexpr auto FREQUENT_LAYER_WINDOW_SIZE = LayerInfo::kFrequentLayerWindowSize;
static constexpr auto PRESENT_TIME_HISTORY_DURATION = LayerInfo::HISTORY_DURATION;
- static constexpr auto REFRESH_RATE_AVERAGE_HISTORY_DURATION =
- LayerInfo::RefreshRateHistory::HISTORY_DURATION;
static constexpr Fps LO_FPS = 30_Hz;
static constexpr auto LO_FPS_PERIOD = LO_FPS.getPeriodNsecs();
@@ -607,7 +605,7 @@ TEST_F(LayerHistoryTest, inactiveLayers) {
// advance the time for the previous frame to be inactive
time += MAX_ACTIVE_LAYER_PERIOD_NS.count();
- // Now event if we post a quick few frame we should stay infrequent
+ // Now even if we post a quick few frame we should stay infrequent
for (int i = 0; i < FREQUENT_LAYER_WINDOW_SIZE - 1; i++) {
history().record(layer.get(), time, time, LayerHistory::LayerUpdateType::Buffer);
time += HI_FPS_PERIOD;
@@ -706,6 +704,88 @@ TEST_F(LayerHistoryTest, infrequentAnimatingLayer) {
EXPECT_EQ(1, animatingLayerCount(time));
}
+TEST_F(LayerHistoryTest, frequentLayerBecomingInfrequentAndBack) {
+ auto layer = createLayer();
+
+ EXPECT_CALL(*layer, isVisible()).WillRepeatedly(Return(true));
+ EXPECT_CALL(*layer, getFrameRateForLayerTree()).WillRepeatedly(Return(Layer::FrameRate()));
+
+ nsecs_t time = systemTime();
+
+ EXPECT_EQ(1, layerCount());
+ EXPECT_EQ(0, activeLayerCount());
+ EXPECT_EQ(0, frequentLayerCount(time));
+ EXPECT_EQ(0, animatingLayerCount(time));
+
+ // Fill up the window with frequent updates
+ for (int i = 0; i < FREQUENT_LAYER_WINDOW_SIZE; i++) {
+ history().record(layer.get(), time, time, LayerHistory::LayerUpdateType::Buffer);
+ time += (60_Hz).getPeriodNsecs();
+
+ EXPECT_EQ(1, layerCount());
+ ASSERT_EQ(1, summarizeLayerHistory(time).size());
+ EXPECT_EQ(LayerHistory::LayerVoteType::Max, summarizeLayerHistory(time)[0].vote);
+ EXPECT_EQ(1, activeLayerCount());
+ EXPECT_EQ(1, frequentLayerCount(time));
+ }
+
+ // posting a buffer after long inactivity should retain the layer as active
+ time += std::chrono::nanoseconds(3s).count();
+ history().record(layer.get(), time, time, LayerHistory::LayerUpdateType::Buffer);
+ ASSERT_EQ(1, summarizeLayerHistory(time).size());
+ EXPECT_EQ(LayerHistory::LayerVoteType::Heuristic, summarizeLayerHistory(time)[0].vote);
+ EXPECT_EQ(60_Hz, summarizeLayerHistory(time)[0].desiredRefreshRate);
+ EXPECT_EQ(1, activeLayerCount());
+ EXPECT_EQ(1, frequentLayerCount(time));
+ EXPECT_EQ(0, animatingLayerCount(time));
+
+ // posting more infrequent buffer should make the layer infrequent
+ time += (MAX_FREQUENT_LAYER_PERIOD_NS + 1ms).count();
+ history().record(layer.get(), time, time, LayerHistory::LayerUpdateType::Buffer);
+ time += (MAX_FREQUENT_LAYER_PERIOD_NS + 1ms).count();
+ history().record(layer.get(), time, time, LayerHistory::LayerUpdateType::Buffer);
+ ASSERT_EQ(1, summarizeLayerHistory(time).size());
+ EXPECT_EQ(LayerHistory::LayerVoteType::Min, summarizeLayerHistory(time)[0].vote);
+ EXPECT_EQ(1, activeLayerCount());
+ EXPECT_EQ(0, frequentLayerCount(time));
+ EXPECT_EQ(0, animatingLayerCount(time));
+
+ // posting another buffer should keep the layer infrequent
+ history().record(layer.get(), time, time, LayerHistory::LayerUpdateType::Buffer);
+ ASSERT_EQ(1, summarizeLayerHistory(time).size());
+ EXPECT_EQ(LayerHistory::LayerVoteType::Min, summarizeLayerHistory(time)[0].vote);
+ EXPECT_EQ(1, activeLayerCount());
+ EXPECT_EQ(0, frequentLayerCount(time));
+ EXPECT_EQ(0, animatingLayerCount(time));
+
+ // posting more buffers would mean starting of an animation, so making the layer frequent
+ history().record(layer.get(), time, time, LayerHistory::LayerUpdateType::Buffer);
+ history().record(layer.get(), time, time, LayerHistory::LayerUpdateType::Buffer);
+ ASSERT_EQ(1, summarizeLayerHistory(time).size());
+ EXPECT_EQ(LayerHistory::LayerVoteType::Max, summarizeLayerHistory(time)[0].vote);
+ EXPECT_EQ(1, activeLayerCount());
+ EXPECT_EQ(1, frequentLayerCount(time));
+ EXPECT_EQ(0, animatingLayerCount(time));
+
+ // posting a buffer after long inactivity should retain the layer as active
+ time += std::chrono::nanoseconds(3s).count();
+ history().record(layer.get(), time, time, LayerHistory::LayerUpdateType::Buffer);
+ ASSERT_EQ(1, summarizeLayerHistory(time).size());
+ EXPECT_EQ(LayerHistory::LayerVoteType::Max, summarizeLayerHistory(time)[0].vote);
+ EXPECT_EQ(1, activeLayerCount());
+ EXPECT_EQ(1, frequentLayerCount(time));
+ EXPECT_EQ(0, animatingLayerCount(time));
+
+ // posting another buffer should keep the layer frequent
+ time += (60_Hz).getPeriodNsecs();
+ history().record(layer.get(), time, time, LayerHistory::LayerUpdateType::Buffer);
+ ASSERT_EQ(1, summarizeLayerHistory(time).size());
+ EXPECT_EQ(LayerHistory::LayerVoteType::Max, summarizeLayerHistory(time)[0].vote);
+ EXPECT_EQ(1, activeLayerCount());
+ EXPECT_EQ(1, frequentLayerCount(time));
+ EXPECT_EQ(0, animatingLayerCount(time));
+}
+
TEST_F(LayerHistoryTest, getFramerate) {
auto layer = createLayer();
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2026-01-01 11:49:49 +0000