Merge "SurfaceFlinger: frame rate heuristic during config change" into rvc-dev am: 36725c77ca (06b8b6eb) · Commits · e / devices / smdk4412 / android_frameworks_native

services/surfaceflinger/Scheduler/LayerHistory.h

+9 −0

Original line number	Diff line number	Diff line
		@@ -52,6 +52,8 @@ public:
		// Sets the display size. Client is responsible for synchronization.
		virtual void setDisplayArea(uint32_t displayArea) = 0;

		virtual void setConfigChangePending(bool pending) = 0;

		// Marks the layer as active, and records the given state to its history.
		virtual void record(Layer*, nsecs_t presentTime, nsecs_t now) = 0;

		@@ -78,6 +80,8 @@ public:

		void setDisplayArea(uint32_t /displayArea/) override {}

		void setConfigChangePending(bool /pending/) override {}

		// Marks the layer as active, and records the given state to its history.
		void record(Layer*, nsecs_t presentTime, nsecs_t now) override;

		@@ -134,6 +138,8 @@ public:
		// Sets the display size. Client is responsible for synchronization.
		void setDisplayArea(uint32_t displayArea) override { mDisplayArea = displayArea; }

		void setConfigChangePending(bool pending) override { mConfigChangePending = pending; }

		// Marks the layer as active, and records the given state to its history.
		void record(Layer*, nsecs_t presentTime, nsecs_t now) override;

		@@ -178,6 +184,9 @@ private:

		// Whether to use priority sent from WindowManager to determine the relevancy of the layer.
		const bool mUseFrameRatePriority;

		// Whether a config change is in progress or not
		std::atomic<bool> mConfigChangePending = false;
		};

		} // namespace impl

services/surfaceflinger/Scheduler/LayerHistoryV2.cpp

+1 −1

Original line number	Diff line number	Diff line
		@@ -103,7 +103,7 @@ void LayerHistoryV2::record(Layer* layer, nsecs_t presentTime, nsecs_t now) {
		LOG_FATAL_IF(it == mLayerInfos.end(), "%s: unknown layer %p", __FUNCTION__, layer);

		const auto& info = it->second;
		info->setLastPresentTime(presentTime, now);
		info->setLastPresentTime(presentTime, now, mConfigChangePending);

		// Activate layer if inactive.
		if (const auto end = activeLayers().end(); it >= end) {

services/surfaceflinger/Scheduler/LayerInfoV2.cpp

+46 −22

Original line number	Diff line number	Diff line
		@@ -34,12 +34,15 @@ LayerInfoV2::LayerInfoV2(const std::string& name, nsecs_t highRefreshRatePeriod,
		mDefaultVote(defaultVote),
		mLayerVote({defaultVote, 0.0f}) {}

		void LayerInfoV2::setLastPresentTime(nsecs_t lastPresentTime, nsecs_t now) {
		void LayerInfoV2::setLastPresentTime(nsecs_t lastPresentTime, nsecs_t now,
		bool pendingConfigChange) {
		lastPresentTime = std::max(lastPresentTime, static_cast<nsecs_t>(0));

		mLastUpdatedTime = std::max(lastPresentTime, now);

		FrameTimeData frameTime = {.presetTime = lastPresentTime, .queueTime = mLastUpdatedTime};
		FrameTimeData frameTime = {.presetTime = lastPresentTime,
		.queueTime = mLastUpdatedTime,
		.pendingConfigChange = pendingConfigChange};

		mFrameTimes.push_back(frameTime);
		if (mFrameTimes.size() > HISTORY_SIZE) {
		@@ -80,21 +83,20 @@ bool LayerInfoV2::hasEnoughDataForHeuristic() const {
		return true;
		}

		std::optional<float> LayerInfoV2::calculateRefreshRateIfPossible() {
		static constexpr float MARGIN = 1.0f; // 1Hz

		if (!hasEnoughDataForHeuristic()) {
		ALOGV("Not enough data");
		return std::nullopt;
		}

		// Calculate the refresh rate by finding the average delta between frames
		std::pair<nsecs_t, bool> LayerInfoV2::calculateAverageFrameTime() const {
		nsecs_t totalPresentTimeDeltas = 0;
		nsecs_t totalQueueTimeDeltas = 0;
		auto missingPresentTime = false;
		bool missingPresentTime = false;
		int numFrames = 0;
		for (auto it = mFrameTimes.begin(); it != mFrameTimes.end() - 1; ++it) {
		// Ignore frames captured during a config change
		if (it->pendingConfigChange \|\| (it + 1)->pendingConfigChange) {
		continue;
		}

		totalQueueTimeDeltas +=
		std::max(((it + 1)->queueTime - it->queueTime), mHighRefreshRatePeriod);
		numFrames++;

		if (it->presetTime == 0 \|\| (it + 1)->presetTime == 0) {
		missingPresentTime = true;
		@@ -105,11 +107,6 @@ std::optional<float> LayerInfoV2::calculateRefreshRateIfPossible() {
		std::max(((it + 1)->presetTime - it->presetTime), mHighRefreshRatePeriod);
		}

		// If there are no presentation timestamps provided we can't calculate the refresh rate
		if (missingPresentTime && mLastReportedRefreshRate == 0) {
		return std::nullopt;
		}

		// Calculate the average frame time based on presentation timestamps. If those
		// doesn't exist, we look at the time the buffer was queued only. We can do that only if
		// we calculated a refresh rate based on presentation timestamps in the past. The reason
		@@ -117,13 +114,18 @@ std::optional<float> LayerInfoV2::calculateRefreshRateIfPossible() {
		// when implementing render ahead for specific refresh rates. When hwui no longer provides
		// presentation timestamps we look at the queue time to see if the current refresh rate still
		// matches the content.
		const float averageFrameTime =
		const auto averageFrameTime =
		static_cast<float>(missingPresentTime ? totalQueueTimeDeltas : totalPresentTimeDeltas) /
		(mFrameTimes.size() - 1);
		numFrames;
		return {static_cast<nsecs_t>(averageFrameTime), missingPresentTime};
		}

		// Now once we calculated the refresh rate we need to make sure that all the frames we captured
		// are evenly distributed and we don't calculate the average across some burst of frames.
		bool LayerInfoV2::isRefreshRateStable(nsecs_t averageFrameTime, bool missingPresentTime) const {
		for (auto it = mFrameTimes.begin(); it != mFrameTimes.end() - 1; ++it) {
		// Ignore frames captured during a config change
		if (it->pendingConfigChange \|\| (it + 1)->pendingConfigChange) {
		continue;
		}
		const auto presentTimeDeltas = [&] {
		const auto delta = missingPresentTime ? (it + 1)->queueTime - it->queueTime
		: (it + 1)->presetTime - it->presetTime;
		@@ -131,8 +133,30 @@ std::optional<float> LayerInfoV2::calculateRefreshRateIfPossible() {
		}();

		if (std::abs(presentTimeDeltas - averageFrameTime) > 2 * averageFrameTime) {
		return false;
		}
		}

		return true;
		}

		std::optional<float> LayerInfoV2::calculateRefreshRateIfPossible() {
		static constexpr float MARGIN = 1.0f; // 1Hz

		if (!hasEnoughDataForHeuristic()) {
		ALOGV("Not enough data");
		return std::nullopt;
		}

		const auto [averageFrameTime, missingPresentTime] = calculateAverageFrameTime();

		// If there are no presentation timestamps provided we can't calculate the refresh rate
		if (missingPresentTime && mLastReportedRefreshRate == 0) {
		return std::nullopt;
		}

		if (!isRefreshRateStable(averageFrameTime, missingPresentTime)) {
		return std::nullopt;
		}

		const auto refreshRate = 1e9f / averageFrameTime;

services/surfaceflinger/Scheduler/LayerInfoV2.h

+4 −1

Original line number	Diff line number	Diff line
		@@ -63,7 +63,7 @@ public:
		// Records the last requested present time. It also stores information about when
		// the layer was last updated. If the present time is farther in the future than the
		// updated time, the updated time is the present time.
		void setLastPresentTime(nsecs_t lastPresentTime, nsecs_t now);
		void setLastPresentTime(nsecs_t lastPresentTime, nsecs_t now, bool pendingConfigChange);

		// Sets an explicit layer vote. This usually comes directly from the application via
		// ANativeWindow_setFrameRate API
		@@ -93,11 +93,14 @@ private:
		struct FrameTimeData {
		nsecs_t presetTime; // desiredPresentTime, if provided
		nsecs_t queueTime; // buffer queue time
		bool pendingConfigChange;
		};

		bool isFrequent(nsecs_t now) const;
		bool hasEnoughDataForHeuristic() const;
		std::optional<float> calculateRefreshRateIfPossible();
		std::pair<nsecs_t, bool> calculateAverageFrameTime() const;
		bool isRefreshRateStable(nsecs_t averageFrameTime, bool missingPresentTime) const;

		const std::string mName;

services/surfaceflinger/Scheduler/Scheduler.cpp

+6 −0

Original line number	Diff line number	Diff line
		@@ -423,6 +423,12 @@ void Scheduler::recordLayerHistory(Layer* layer, nsecs_t presentTime) {
		}
		}

		void Scheduler::setConfigChangePending(bool pending) {
		if (mLayerHistory) {
		mLayerHistory->setConfigChangePending(pending);
		}
		}

		void Scheduler::chooseRefreshRateForContent() {
		if (!mLayerHistory) return;