Split out jank data from policy (7075c792) · Commits · e / os / android_frameworks_base

libs/hwui/Android.bp

+1 −0

Original line number	Diff line number	Diff line
		@@ -201,6 +201,7 @@ cc_defaults {
		"PathParser.cpp",
		"PathTessellator.cpp",
		"PixelBuffer.cpp",
		"ProfileData.cpp",
		"ProfileRenderer.cpp",
		"Program.cpp",
		"ProgramCache.cpp",

libs/hwui/JankTracker.cpp

+7 −145

Original line number	Diff line number	Diff line
		@@ -34,14 +34,6 @@
		namespace android {
		namespace uirenderer {

		static const char* JANK_TYPE_NAMES[] = {
		"Missed Vsync",
		"High input latency",
		"Slow UI thread",
		"Slow bitmap uploads",
		"Slow issue draw commands",
		};

		struct Comparison {
		FrameInfoIndex start;
		FrameInfoIndex end;
		@@ -68,65 +60,11 @@ static const int64_t IGNORE_EXCEEDING = seconds_to_nanoseconds(10);
		*/
		static const int64_t EXEMPT_FRAMES_FLAGS = FrameInfoFlags::SurfaceCanvas;

		// The bucketing algorithm controls so to speak
		// If a frame is <= to this it goes in bucket 0
		static const uint32_t kBucketMinThreshold = 5;
		// If a frame is > this, start counting in increments of 2ms
		static const uint32_t kBucket2msIntervals = 32;
		// If a frame is > this, start counting in increments of 4ms
		static const uint32_t kBucket4msIntervals = 48;

		// For testing purposes to try and eliminate test infra overhead we will
		// consider any unknown delay of frame start as part of the test infrastructure
		// and filter it out of the frame profile data
		static FrameInfoIndex sFrameStart = FrameInfoIndex::IntendedVsync;

		// The interval of the slow frame histogram
		static const uint32_t kSlowFrameBucketIntervalMs = 50;
		// The start point of the slow frame bucket in ms
		static const uint32_t kSlowFrameBucketStartMs = 150;

		// This will be called every frame, performance sensitive
		// Uses bit twiddling to avoid branching while achieving the packing desired
		static uint32_t frameCountIndexForFrameTime(nsecs_t frameTime) {
		uint32_t index = static_cast<uint32_t>(ns2ms(frameTime));
		// If index > kBucketMinThreshold mask will be 0xFFFFFFFF as a result
		// of negating 1 (twos compliment, yaay) else mask will be 0
		uint32_t mask = -(index > kBucketMinThreshold);
		// If index > threshold, this will essentially perform:
		// amountAboveThreshold = index - threshold;
		// index = threshold + (amountAboveThreshold / 2)
		// However if index is <= this will do nothing. It will underflow, do
		// a right shift by 0 (no-op), then overflow back to the original value
		index = ((index - kBucket4msIntervals) >> (index > kBucket4msIntervals))
		+ kBucket4msIntervals;
		index = ((index - kBucket2msIntervals) >> (index > kBucket2msIntervals))
		+ kBucket2msIntervals;
		// If index was < minThreshold at the start of all this it's going to
		// be a pretty garbage value right now. However, mask is 0 so we'll end
		// up with the desired result of 0.
		index = (index - kBucketMinThreshold) & mask;
		return index;
		}

		// Only called when dumping stats, less performance sensitive
		int32_t JankTracker::frameTimeForFrameCountIndex(uint32_t index) {
		index = index + kBucketMinThreshold;
		if (index > kBucket2msIntervals) {
		index += (index - kBucket2msIntervals);
		}
		if (index > kBucket4msIntervals) {
		// This works because it was already doubled by the above if
		// 1 is added to shift slightly more towards the middle of the bucket
		index += (index - kBucket4msIntervals) + 1;
		}
		return index;
		}

		int32_t JankTracker::frameTimeForSlowFrameCountIndex(uint32_t index) {
		return (index * kSlowFrameBucketIntervalMs) + kSlowFrameBucketStartMs;
		}

		JankTracker::JankTracker(const DisplayInfo& displayInfo) {
		// By default this will use malloc memory. It may be moved later to ashmem
		// if there is shared space for it and a request comes in to do that.
		@@ -199,29 +137,7 @@ void JankTracker::switchStorageToAshmem(int ashmemfd) {
		return;
		}

		// The new buffer may have historical data that we want to build on top of
		// But let's make sure we don't overflow Just In Case
		uint32_t divider = 0;
		if (newData->totalFrameCount > (1 << 24)) {
		divider = 4;
		}
		for (size_t i = 0; i < mData->jankTypeCounts.size(); i++) {
		newData->jankTypeCounts[i] >>= divider;
		newData->jankTypeCounts[i] += mData->jankTypeCounts[i];
		}
		for (size_t i = 0; i < mData->frameCounts.size(); i++) {
		newData->frameCounts[i] >>= divider;
		newData->frameCounts[i] += mData->frameCounts[i];
		}
		newData->jankFrameCount >>= divider;
		newData->jankFrameCount += mData->jankFrameCount;
		newData->totalFrameCount >>= divider;
		newData->totalFrameCount += mData->totalFrameCount;
		if (newData->statStartTime > mData->statStartTime
		\|\| newData->statStartTime == 0) {
		newData->statStartTime = mData->statStartTime;
		}

		newData->mergeWith(*mData);
		freeData();
		mData = newData;
		mIsMapped = true;
		@@ -251,7 +167,6 @@ void JankTracker::setFrameInterval(nsecs_t frameInterval) {
		}

		void JankTracker::addFrame(const FrameInfo& frame) {
		mData->totalFrameCount++;
		// Fast-path for jank-free frames
		int64_t totalDuration = frame.duration(sFrameStart, FrameInfoIndex::FrameCompleted);
		if (mDequeueTimeForgiveness
		@@ -271,11 +186,10 @@ void JankTracker::addFrame(const FrameInfo& frame) {
		}
		}
		LOG_ALWAYS_FATAL_IF(totalDuration <= 0, "Impossible totalDuration %" PRId64, totalDuration);
		uint32_t framebucket = frameCountIndexForFrameTime(totalDuration);
		LOG_ALWAYS_FATAL_IF(framebucket < 0, "framebucket < 0 (%u)", framebucket);
		mData->reportFrame(totalDuration);

		// Keep the fast path as fast as possible.
		if (CC_LIKELY(totalDuration < mFrameInterval)) {
		mData->frameCounts[framebucket]++;
		return;
		}

		@@ -284,22 +198,12 @@ void JankTracker::addFrame(const FrameInfo& frame) {
		return;
		}

		if (framebucket <= mData->frameCounts.size()) {
		mData->frameCounts[framebucket]++;
		} else {
		framebucket = (ns2ms(totalDuration) - kSlowFrameBucketStartMs)
		/ kSlowFrameBucketIntervalMs;
		framebucket = std::min(framebucket,
		static_cast<uint32_t>(mData->slowFrameCounts.size() - 1));
		mData->slowFrameCounts[framebucket]++;
		}

		mData->jankFrameCount++;
		mData->reportJank();

		for (int i = 0; i < NUM_BUCKETS; i++) {
		int64_t delta = frame.duration(COMPARISONS[i].start, COMPARISONS[i].end);
		if (delta >= mThresholds[i] && delta < IGNORE_EXCEEDING) {
		mData->jankTypeCounts[i]++;
		mData->reportJankType((JankType) i);
		}
		}
		}
		@@ -320,58 +224,16 @@ void JankTracker::dumpData(int fd, const ProfileDataDescription* description, co
		if (sFrameStart != FrameInfoIndex::IntendedVsync) {
		dprintf(fd, "\nNote: Data has been filtered!");
		}
		dprintf(fd, "\nStats since: %" PRIu64 "ns", data->statStartTime);
		dprintf(fd, "\nTotal frames rendered: %u", data->totalFrameCount);
		dprintf(fd, "\nJanky frames: %u (%.2f%%)", data->jankFrameCount,
		(float) data->jankFrameCount / (float) data->totalFrameCount * 100.0f);
		dprintf(fd, "\n50th percentile: %ums", findPercentile(data, 50));
		dprintf(fd, "\n90th percentile: %ums", findPercentile(data, 90));
		dprintf(fd, "\n95th percentile: %ums", findPercentile(data, 95));
		dprintf(fd, "\n99th percentile: %ums", findPercentile(data, 99));
		for (int i = 0; i < NUM_BUCKETS; i++) {
		dprintf(fd, "\nNumber %s: %u", JANK_TYPE_NAMES[i], data->jankTypeCounts[i]);
		}
		dprintf(fd, "\nHISTOGRAM:");
		for (size_t i = 0; i < data->frameCounts.size(); i++) {
		dprintf(fd, " %ums=%u", frameTimeForFrameCountIndex(i),
		data->frameCounts[i]);
		}
		for (size_t i = 0; i < data->slowFrameCounts.size(); i++) {
		dprintf(fd, " %ums=%u", frameTimeForSlowFrameCountIndex(i),
		data->slowFrameCounts[i]);
		}
		data->dump(fd);
		dprintf(fd, "\n");
		}

		void JankTracker::reset() {
		mData->jankTypeCounts.fill(0);
		mData->frameCounts.fill(0);
		mData->slowFrameCounts.fill(0);
		mData->totalFrameCount = 0;
		mData->jankFrameCount = 0;
		mData->statStartTime = systemTime(CLOCK_MONOTONIC);
		mData->reset();
		sFrameStart = Properties::filterOutTestOverhead
		? FrameInfoIndex::HandleInputStart
		: FrameInfoIndex::IntendedVsync;
		}

		uint32_t JankTracker::findPercentile(const ProfileData* data, int percentile) {
		int pos = percentile * data->totalFrameCount / 100;
		int remaining = data->totalFrameCount - pos;
		for (int i = data->slowFrameCounts.size() - 1; i >= 0; i--) {
		remaining -= data->slowFrameCounts[i];
		if (remaining <= 0) {
		return (i * kSlowFrameBucketIntervalMs) + kSlowFrameBucketStartMs;
		}
		}
		for (int i = data->frameCounts.size() - 1; i >= 0; i--) {
		remaining -= data->frameCounts[i];
		if (remaining <= 0) {
		return frameTimeForFrameCountIndex(i);
		}
		}
		return 0;
		}

		} /* namespace uirenderer */
		} /* namespace android */

libs/hwui/JankTracker.h

+2 −29

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		#define JANKTRACKER_H_

		#include "FrameInfo.h"
		#include "ProfileData.h"
		#include "renderthread/TimeLord.h"
		#include "utils/RingBuffer.h"

		@@ -29,31 +30,6 @@
		namespace android {
		namespace uirenderer {

		enum JankType {
		kMissedVsync = 0,
		kHighInputLatency,
		kSlowUI,
		kSlowSync,
		kSlowRT,

		// must be last
		NUM_BUCKETS,
		};

		// Try to keep as small as possible, should match ASHMEM_SIZE in
		// GraphicsStatsService.java
		struct ProfileData {
		std::array<uint32_t, NUM_BUCKETS> jankTypeCounts;
		// See comments on kBucket* constants for what this holds
		std::array<uint32_t, 57> frameCounts;
		// Holds a histogram of frame times in 50ms increments from 150ms to 5s
		std::array<uint16_t, 97> slowFrameCounts;

		uint32_t totalFrameCount;
		uint32_t jankFrameCount;
		nsecs_t statStartTime;
		};

		enum class JankTrackerType {
		// The default, means there's no description set
		Generic,
		@@ -88,15 +64,12 @@ public:
		void rotateStorage();
		void switchStorageToAshmem(int ashmemfd);

		uint32_t findPercentile(int p) { return findPercentile(mData, p); }
		static int32_t frameTimeForFrameCountIndex(uint32_t index);
		static int32_t frameTimeForSlowFrameCountIndex(uint32_t index);
		uint32_t findPercentile(int p) { return mData->findPercentile(p); }

		private:
		void freeData();
		void setFrameInterval(nsecs_t frameIntervalNanos);

		static uint32_t findPercentile(const ProfileData* data, int p);
		static void dumpData(int fd, const ProfileDataDescription* description, const ProfileData* data);

		std::array<int64_t, NUM_BUCKETS> mThresholds;

libs/hwui/ProfileData.cpp

0 → 100644

+177 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2017 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		#include "ProfileData.h"

		#include <cinttypes>

		namespace android {
		namespace uirenderer {

		static const char* JANK_TYPE_NAMES[] = {
		"Missed Vsync",
		"High input latency",
		"Slow UI thread",
		"Slow bitmap uploads",
		"Slow issue draw commands",
		};

		// The bucketing algorithm controls so to speak
		// If a frame is <= to this it goes in bucket 0
		static const uint32_t kBucketMinThreshold = 5;
		// If a frame is > this, start counting in increments of 2ms
		static const uint32_t kBucket2msIntervals = 32;
		// If a frame is > this, start counting in increments of 4ms
		static const uint32_t kBucket4msIntervals = 48;

		// The interval of the slow frame histogram
		static const uint32_t kSlowFrameBucketIntervalMs = 50;
		// The start point of the slow frame bucket in ms
		static const uint32_t kSlowFrameBucketStartMs = 150;

		// This will be called every frame, performance sensitive
		// Uses bit twiddling to avoid branching while achieving the packing desired
		static uint32_t frameCountIndexForFrameTime(nsecs_t frameTime) {
		uint32_t index = static_cast<uint32_t>(ns2ms(frameTime));
		// If index > kBucketMinThreshold mask will be 0xFFFFFFFF as a result
		// of negating 1 (twos compliment, yaay) else mask will be 0
		uint32_t mask = -(index > kBucketMinThreshold);
		// If index > threshold, this will essentially perform:
		// amountAboveThreshold = index - threshold;
		// index = threshold + (amountAboveThreshold / 2)
		// However if index is <= this will do nothing. It will underflow, do
		// a right shift by 0 (no-op), then overflow back to the original value
		index = ((index - kBucket4msIntervals) >> (index > kBucket4msIntervals))
		+ kBucket4msIntervals;
		index = ((index - kBucket2msIntervals) >> (index > kBucket2msIntervals))
		+ kBucket2msIntervals;
		// If index was < minThreshold at the start of all this it's going to
		// be a pretty garbage value right now. However, mask is 0 so we'll end
		// up with the desired result of 0.
		index = (index - kBucketMinThreshold) & mask;
		return index;
		}

		// Only called when dumping stats, less performance sensitive
		uint32_t ProfileData::frameTimeForFrameCountIndex(uint32_t index) {
		index = index + kBucketMinThreshold;
		if (index > kBucket2msIntervals) {
		index += (index - kBucket2msIntervals);
		}
		if (index > kBucket4msIntervals) {
		// This works because it was already doubled by the above if
		// 1 is added to shift slightly more towards the middle of the bucket
		index += (index - kBucket4msIntervals) + 1;
		}
		return index;
		}

		uint32_t ProfileData::frameTimeForSlowFrameCountIndex(uint32_t index) {
		return (index * kSlowFrameBucketIntervalMs) + kSlowFrameBucketStartMs;
		}

		void ProfileData::mergeWith(const ProfileData& other) {
		// Make sure we don't overflow Just In Case
		uint32_t divider = 0;
		if (mTotalFrameCount > (1 << 24)) {
		divider = 4;
		}
		for (size_t i = 0; i < other.mJankTypeCounts.size(); i++) {
		mJankTypeCounts[i] >>= divider;
		mJankTypeCounts[i] += other.mJankTypeCounts[i];
		}
		for (size_t i = 0; i < other.mFrameCounts.size(); i++) {
		mFrameCounts[i] >>= divider;
		mFrameCounts[i] += other.mFrameCounts[i];
		}
		mJankFrameCount >>= divider;
		mJankFrameCount += other.mJankFrameCount;
		mTotalFrameCount >>= divider;
		mTotalFrameCount += other.mTotalFrameCount;
		if (mStatStartTime > other.mStatStartTime
		\|\| mStatStartTime == 0) {
		mStatStartTime = other.mStatStartTime;
		}
		}

		void ProfileData::dump(int fd) const {
		dprintf(fd, "\nStats since: %" PRIu64 "ns", mStatStartTime);
		dprintf(fd, "\nTotal frames rendered: %u", mTotalFrameCount);
		dprintf(fd, "\nJanky frames: %u (%.2f%%)", mJankFrameCount,
		(float) mJankFrameCount / (float) mTotalFrameCount * 100.0f);
		dprintf(fd, "\n50th percentile: %ums", findPercentile(50));
		dprintf(fd, "\n90th percentile: %ums", findPercentile(90));
		dprintf(fd, "\n95th percentile: %ums", findPercentile(95));
		dprintf(fd, "\n99th percentile: %ums", findPercentile(99));
		for (int i = 0; i < NUM_BUCKETS; i++) {
		dprintf(fd, "\nNumber %s: %u", JANK_TYPE_NAMES[i], mJankTypeCounts[i]);
		}
		dprintf(fd, "\nHISTOGRAM:");
		histogramForEach([fd](HistogramEntry entry) {
		dprintf(fd, " %ums=%u", entry.renderTimeMs, entry.frameCount);
		});
		}

		uint32_t ProfileData::findPercentile(int percentile) const {
		int pos = percentile * mTotalFrameCount / 100;
		int remaining = mTotalFrameCount - pos;
		for (int i = mSlowFrameCounts.size() - 1; i >= 0; i--) {
		remaining -= mSlowFrameCounts[i];
		if (remaining <= 0) {
		return (i * kSlowFrameBucketIntervalMs) + kSlowFrameBucketStartMs;
		}
		}
		for (int i = mFrameCounts.size() - 1; i >= 0; i--) {
		remaining -= mFrameCounts[i];
		if (remaining <= 0) {
		return frameTimeForFrameCountIndex(i);
		}
		}
		return 0;
		}

		void ProfileData::reset() {
		mJankTypeCounts.fill(0);
		mFrameCounts.fill(0);
		mSlowFrameCounts.fill(0);
		mTotalFrameCount = 0;
		mJankFrameCount = 0;
		mStatStartTime = systemTime(CLOCK_MONOTONIC);
		}

		void ProfileData::reportFrame(int64_t duration) {
		mTotalFrameCount++;
		uint32_t framebucket = frameCountIndexForFrameTime(duration);
		if (framebucket <= mFrameCounts.size()) {
		mFrameCounts[framebucket]++;
		} else {
		framebucket = (ns2ms(duration) - kSlowFrameBucketStartMs) / kSlowFrameBucketIntervalMs;
		framebucket = std::min(framebucket, static_cast<uint32_t>(mSlowFrameCounts.size() - 1));
		mSlowFrameCounts[framebucket]++;
		}
		}

		void ProfileData::histogramForEach(const std::function<void(HistogramEntry)>& callback) const {
		for (size_t i = 0; i < mFrameCounts.size(); i++) {
		callback(HistogramEntry{frameTimeForFrameCountIndex(i), mFrameCounts[i]});
		}
		for (size_t i = 0; i < mSlowFrameCounts.size(); i++) {
		callback(HistogramEntry{frameTimeForSlowFrameCountIndex(i), mSlowFrameCounts[i]});
		}
		}

		} /* namespace uirenderer */
		} /* namespace android */
		No newline at end of file

libs/hwui/ProfileData.h

0 → 100644

+109 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2017 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		#pragma once

		#include "utils/Macros.h"

		#include <utils/Timers.h>

		#include <array>
		#include <functional>
		#include <tuple>

		namespace android {
		namespace uirenderer {

		enum JankType {
		kMissedVsync = 0,
		kHighInputLatency,
		kSlowUI,
		kSlowSync,
		kSlowRT,

		// must be last
		NUM_BUCKETS,
		};

		// For testing
		class MockProfileData;

		// Try to keep as small as possible, should match ASHMEM_SIZE in
		// GraphicsStatsService.java
		class ProfileData {
		PREVENT_COPY_AND_ASSIGN(ProfileData);

		public:
		ProfileData() { reset(); }

		void reset();
		void mergeWith(const ProfileData& other);
		void dump(int fd) const;
		uint32_t findPercentile(int percentile) const;

		void reportFrame(int64_t duration);
		void reportJank() { mJankFrameCount++; }
		void reportJankType(JankType type) { mJankTypeCounts[static_cast<int>(type)]++; }

		uint32_t totalFrameCount() const { return mTotalFrameCount; }
		uint32_t jankFrameCount() const { return mJankFrameCount; }
		nsecs_t statsStartTime() const { return mStatStartTime; }
		uint32_t jankTypeCount(JankType type) const { return mJankTypeCounts[static_cast<int>(type)]; }

		struct HistogramEntry {
		uint32_t renderTimeMs;
		uint32_t frameCount;
		};
		void histogramForEach(const std::function<void(HistogramEntry)>& callback) const;

		constexpr static int HistogramSize() {
		return std::tuple_size<decltype(ProfileData::mFrameCounts)>::value
		+ std::tuple_size<decltype(ProfileData::mSlowFrameCounts)>::value;
		}

		// Visible for testing
		static uint32_t frameTimeForFrameCountIndex(uint32_t index);
		static uint32_t frameTimeForSlowFrameCountIndex(uint32_t index);

		private:
		// Open our guts up to unit tests
		friend class MockProfileData;

		std::array <uint32_t, NUM_BUCKETS> mJankTypeCounts;
		// See comments on kBucket* constants for what this holds
		std::array<uint32_t, 57> mFrameCounts;
		// Holds a histogram of frame times in 50ms increments from 150ms to 5s
		std::array<uint16_t, 97> mSlowFrameCounts;

		uint32_t mTotalFrameCount;
		uint32_t mJankFrameCount;
		nsecs_t mStatStartTime;
		};

		// For testing
		class MockProfileData : public ProfileData {
		public:
		std::array<uint32_t, NUM_BUCKETS>& editJankTypeCounts() { return mJankTypeCounts; }
		std::array<uint32_t, 57>& editFrameCounts() { return mFrameCounts; }
		std::array<uint16_t, 97>& editSlowFrameCounts() { return mSlowFrameCounts; }
		uint32_t& editTotalFrameCount() { return mTotalFrameCount; }
		uint32_t& editJankFrameCount() { return mJankFrameCount; }
		nsecs_t& editStatStartTime() { return mStatStartTime; }
		};

		} /* namespace uirenderer */
		} /* namespace android */