SF: Add composition strategy prediction stats
Track number of frames we attempted to predict
the composition strategy and the number of
frames it was successful. This should only be used
as a convenient way to debug locally. Composition
strategy prediction hit and misses are also tracked
via trace tags and can be extracted for metrics.
Enable stats: adb shell su root dumpsys SurfaceFlinger --timestats -enable
Dump stats: adb shell su root dumpsys SurfaceFlinger --timestats -dump -maxlayers 0
Clear stats: adb shell su root dumpsys SurfaceFlinger --timestats -clear
Test: adb shell
Bug: 220031739
Change-Id: Ifc35efa7ce110e82041f529b58acebfa1c325f36
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 9191d49..ec6d38d 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -162,6 +162,8 @@
using aidl::android::hardware::graphics::common::DisplayDecorationSupport;
using aidl::android::hardware::graphics::composer3::Capability;
using aidl::android::hardware::graphics::composer3::DisplayCapability;
+using CompositionStrategyPredictionState = android::compositionengine::impl::
+ OutputCompositionState::CompositionStrategyPredictionState;
using base::StringAppendF;
using gui::DisplayInfo;
@@ -2222,24 +2224,24 @@
const bool prevFrameHadClientComposition = mHadClientComposition;
- mHadClientComposition = std::any_of(displays.cbegin(), displays.cend(), [](const auto& pair) {
- const auto& state = pair.second->getCompositionDisplay()->getState();
- return state.usesClientComposition && !state.reusedClientComposition;
- });
- mHadDeviceComposition = std::any_of(displays.cbegin(), displays.cend(), [](const auto& pair) {
- const auto& state = pair.second->getCompositionDisplay()->getState();
- return state.usesDeviceComposition;
- });
- mReusedClientComposition =
- std::any_of(displays.cbegin(), displays.cend(), [](const auto& pair) {
- const auto& state = pair.second->getCompositionDisplay()->getState();
- return state.reusedClientComposition;
- });
- // Only report a strategy change if we move in and out of client composition
- if (prevFrameHadClientComposition != mHadClientComposition) {
- mTimeStats->incrementCompositionStrategyChanges();
+ mHadClientComposition = mHadDeviceComposition = mReusedClientComposition = false;
+ TimeStats::ClientCompositionRecord clientCompositionRecord;
+ for (const auto& [_, display] : displays) {
+ const auto& state = display->getCompositionDisplay()->getState();
+ mHadClientComposition |= state.usesClientComposition && !state.reusedClientComposition;
+ mHadDeviceComposition |= state.usesDeviceComposition;
+ mReusedClientComposition |= state.reusedClientComposition;
+ clientCompositionRecord.predicted |=
+ (state.strategyPrediction != CompositionStrategyPredictionState::DISABLED);
+ clientCompositionRecord.predictionSucceeded |=
+ (state.strategyPrediction == CompositionStrategyPredictionState::SUCCESS);
}
+ clientCompositionRecord.hadClientComposition = mHadClientComposition;
+ clientCompositionRecord.reused = mReusedClientComposition;
+ clientCompositionRecord.changed = prevFrameHadClientComposition != mHadClientComposition;
+ mTimeStats->pushCompositionStrategyState(clientCompositionRecord);
+
// TODO: b/160583065 Enable skip validation when SF caches all client composition layers
const bool usedGpuComposition = mHadClientComposition || mReusedClientComposition;
modulateVsync(&VsyncModulator::onDisplayRefresh, usedGpuComposition);
@@ -2530,13 +2532,6 @@
}
mTimeStats->incrementTotalFrames();
- if (mHadClientComposition) {
- mTimeStats->incrementClientCompositionFrames();
- }
-
- if (mReusedClientComposition) {
- mTimeStats->incrementClientCompositionReusedFrames();
- }
mTimeStats->setPresentFenceGlobal(mPreviousPresentFences[0].fenceTime);