Expose gl/hwc switch counts from timestats.
The intention is that this counter will be used as a drilldown metric in
jank-type tests, as an increase in the change of composition strategy
may correlate with an increase of missed frames.
Bug: 144526027
Test: adb shell dumpsys SurfaceFlinger --timestats -dump
Change-Id: I01994a7d376fb67422563d65b8675457497b4807
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index ddf0775..82fb99e 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2084,6 +2084,8 @@
postFrame();
postComposition();
+ const bool prevFrameHadDeviceComposition = mHadDeviceComposition;
+
mHadClientComposition =
std::any_of(mDisplays.cbegin(), mDisplays.cend(), [](const auto& tokenDisplayPair) {
auto& displayDevice = tokenDisplayPair.second;
@@ -2101,6 +2103,11 @@
return displayDevice->getCompositionDisplay()->getState().reusedClientComposition;
});
+ // Only report a strategy change if we move in and out of composition with hw overlays
+ if (prevFrameHadDeviceComposition != mHadDeviceComposition) {
+ mTimeStats->incrementCompositionStrategyChanges();
+ }
+
mVSyncModulator->onRefreshed(mHadClientComposition);
mLayersWithQueuedFrames.clear();
diff --git a/services/surfaceflinger/TimeStats/TimeStats.cpp b/services/surfaceflinger/TimeStats/TimeStats.cpp
index 606e137..80fe180 100644
--- a/services/surfaceflinger/TimeStats/TimeStats.cpp
+++ b/services/surfaceflinger/TimeStats/TimeStats.cpp
@@ -290,6 +290,15 @@
mTimeStats.refreshRateSwitches++;
}
+void TimeStats::incrementCompositionStrategyChanges() {
+ if (!mEnabled.load()) return;
+
+ ATRACE_CALL();
+
+ std::lock_guard<std::mutex> lock(mMutex);
+ mTimeStats.compositionStrategyChanges++;
+}
+
void TimeStats::recordDisplayEventConnectionCount(int32_t count) {
if (!mEnabled.load()) return;
@@ -844,6 +853,7 @@
mTimeStats.clientCompositionFrames = 0;
mTimeStats.clientCompositionReusedFrames = 0;
mTimeStats.refreshRateSwitches = 0;
+ mTimeStats.compositionStrategyChanges = 0;
mTimeStats.displayEventConnectionsCount = 0;
mTimeStats.displayOnTime = 0;
mTimeStats.presentToPresent.hist.clear();
diff --git a/services/surfaceflinger/TimeStats/TimeStats.h b/services/surfaceflinger/TimeStats/TimeStats.h
index 806b47e..eb48353 100644
--- a/services/surfaceflinger/TimeStats/TimeStats.h
+++ b/services/surfaceflinger/TimeStats/TimeStats.h
@@ -54,6 +54,10 @@
virtual void incrementClientCompositionReusedFrames() = 0;
// Increments the number of times the display refresh rate changed.
virtual void incrementRefreshRateSwitches() = 0;
+ // Increments the number of changes in composition strategy
+ // The intention is to reflect the number of changes between hwc and gpu
+ // composition, where "gpu composition" may also include mixed composition.
+ virtual void incrementCompositionStrategyChanges() = 0;
// Records the most up-to-date count of display event connections.
// The stored count will be the maximum ever recoded.
virtual void recordDisplayEventConnectionCount(int32_t count) = 0;
@@ -218,6 +222,7 @@
void incrementClientCompositionFrames() override;
void incrementClientCompositionReusedFrames() override;
void incrementRefreshRateSwitches() override;
+ void incrementCompositionStrategyChanges() override;
void recordDisplayEventConnectionCount(int32_t count) override;
void recordFrameDuration(nsecs_t startTime, nsecs_t endTime) override;
diff --git a/services/surfaceflinger/TimeStats/timestatsproto/TimeStatsHelper.cpp b/services/surfaceflinger/TimeStats/timestatsproto/TimeStatsHelper.cpp
index 5305de9..c90b1b8 100644
--- a/services/surfaceflinger/TimeStats/timestatsproto/TimeStatsHelper.cpp
+++ b/services/surfaceflinger/TimeStats/timestatsproto/TimeStatsHelper.cpp
@@ -106,6 +106,7 @@
StringAppendF(&result, "clientCompositionFrames = %d\n", clientCompositionFrames);
StringAppendF(&result, "clientCompositionReusedFrames = %d\n", clientCompositionReusedFrames);
StringAppendF(&result, "refreshRateSwitches = %d\n", refreshRateSwitches);
+ StringAppendF(&result, "compositionStrategyChanges = %d\n", compositionStrategyChanges);
StringAppendF(&result, "displayOnTime = %" PRId64 " ms\n", displayOnTime);
StringAppendF(&result, "displayConfigStats is as below:\n");
for (const auto& [fps, duration] : refreshRateStats) {
diff --git a/services/surfaceflinger/TimeStats/timestatsproto/include/timestatsproto/TimeStatsHelper.h b/services/surfaceflinger/TimeStats/timestatsproto/include/timestatsproto/TimeStatsHelper.h
index afb98e0..0c75f96 100644
--- a/services/surfaceflinger/TimeStats/timestatsproto/include/timestatsproto/TimeStatsHelper.h
+++ b/services/surfaceflinger/TimeStats/timestatsproto/include/timestatsproto/TimeStatsHelper.h
@@ -63,6 +63,7 @@
int32_t clientCompositionFrames = 0;
int32_t clientCompositionReusedFrames = 0;
int32_t refreshRateSwitches = 0;
+ int32_t compositionStrategyChanges = 0;
int32_t displayEventConnectionsCount = 0;
int64_t displayOnTime = 0;
Histogram presentToPresent;
diff --git a/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp b/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
index 1f04673..5de6bac 100644
--- a/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
@@ -377,6 +377,21 @@
EXPECT_THAT(result, HasSubstr(expectedResult));
}
+TEST_F(TimeStatsTest, canIncreaseCompositionStrategyChanges) {
+ // this stat is not in the proto so verify by checking the string dump
+ constexpr size_t COMPOSITION_STRATEGY_CHANGES = 2;
+
+ EXPECT_TRUE(inputCommand(InputCommand::ENABLE, FMT_STRING).empty());
+ for (size_t i = 0; i < COMPOSITION_STRATEGY_CHANGES; i++) {
+ ASSERT_NO_FATAL_FAILURE(mTimeStats->incrementCompositionStrategyChanges());
+ }
+
+ const std::string result(inputCommand(InputCommand::DUMP_ALL, FMT_STRING));
+ const std::string expectedResult =
+ "compositionStrategyChanges = " + std::to_string(COMPOSITION_STRATEGY_CHANGES);
+ EXPECT_THAT(result, HasSubstr(expectedResult));
+}
+
TEST_F(TimeStatsTest, canAverageFrameDuration) {
EXPECT_TRUE(inputCommand(InputCommand::ENABLE, FMT_STRING).empty());
mTimeStats->setPowerMode(HWC_POWER_MODE_NORMAL);
@@ -760,6 +775,7 @@
EXPECT_TRUE(inputCommand(InputCommand::ENABLE, FMT_STRING).empty());
ASSERT_NO_FATAL_FAILURE(mTimeStats->incrementClientCompositionReusedFrames());
ASSERT_NO_FATAL_FAILURE(mTimeStats->incrementRefreshRateSwitches());
+ ASSERT_NO_FATAL_FAILURE(mTimeStats->incrementCompositionStrategyChanges());
mTimeStats->setPowerMode(HWC_POWER_MODE_NORMAL);
mTimeStats
->recordFrameDuration(std::chrono::duration_cast<std::chrono::nanoseconds>(1ms).count(),
@@ -776,6 +792,7 @@
const std::string result(inputCommand(InputCommand::DUMP_ALL, FMT_STRING));
EXPECT_THAT(result, HasSubstr("clientCompositionReusedFrames = 0"));
EXPECT_THAT(result, HasSubstr("refreshRateSwitches = 0"));
+ EXPECT_THAT(result, HasSubstr("compositionStrategyChanges = 0"));
EXPECT_THAT(result, HasSubstr("averageFrameDuration = 0.000 ms"));
EXPECT_THAT(result, HasSubstr("averageRenderEngineTiming = 0.000 ms"));
}
diff --git a/services/surfaceflinger/tests/unittests/mock/MockTimeStats.h b/services/surfaceflinger/tests/unittests/mock/MockTimeStats.h
index 9ea4dd0..dca1070 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockTimeStats.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockTimeStats.h
@@ -37,6 +37,7 @@
MOCK_METHOD0(incrementClientCompositionFrames, void());
MOCK_METHOD0(incrementClientCompositionReusedFrames, void());
MOCK_METHOD0(incrementRefreshRateSwitches, void());
+ MOCK_METHOD0(incrementCompositionStrategyChanges, void());
MOCK_METHOD1(recordDisplayEventConnectionCount, void(int32_t));
MOCK_METHOD2(recordFrameDuration, void(nsecs_t, nsecs_t));
MOCK_METHOD2(recordRenderEngineDuration, void(nsecs_t, nsecs_t));