Merge "Add percentiles" (aa35d919) · Commits · e / os / android_frameworks_base

libs/hwui/JankTracker.cpp

+24 −1

Original line number	Diff line number	Diff line
		@@ -15,6 +15,7 @@
		*/
		#include "JankTracker.h"

		#include <algorithm>
		#include <cstdio>
		#include <inttypes.h>

		@@ -95,7 +96,12 @@ void JankTracker::addFrame(const FrameInfo& frame) {
		// Fast-path for jank-free frames
		int64_t totalDuration =
		frame[FrameInfoIndex::kFrameCompleted] - frame[FrameInfoIndex::kIntendedVsync];
		uint32_t framebucket = std::min(
		static_cast<typeof sizeof(mFrameCounts)>(ns2ms(totalDuration)),
		sizeof(mFrameCounts) / sizeof(mFrameCounts[0]));
		// Keep the fast path as fast as possible.
		if (CC_LIKELY(totalDuration < mFrameInterval)) {
		mFrameCounts[framebucket]++;
		return;
		}

		@@ -103,6 +109,7 @@ void JankTracker::addFrame(const FrameInfo& frame) {
		return;
		}

		mFrameCounts[framebucket]++;
		mJankFrameCount++;

		for (int i = 0; i < NUM_BUCKETS; i++) {
		@@ -119,6 +126,9 @@ void JankTracker::dump(int fd) {
		fprintf(file, "\n Total frames rendered: %u", mTotalFrameCount);
		fprintf(file, "\n Janky frames: %u (%.2f%%)", mJankFrameCount,
		(float) mJankFrameCount / (float) mTotalFrameCount * 100.0f);
		fprintf(file, "\n 90th percentile: %ums", findPercentile(90));
		fprintf(file, "\n 95th percentile: %ums", findPercentile(95));
		fprintf(file, "\n 99th percentile: %ums", findPercentile(99));
		for (int i = 0; i < NUM_BUCKETS; i++) {
		fprintf(file, "\n Number %s: %u", JANK_TYPE_NAMES[i], mBuckets[i].count);
		}
		@@ -127,10 +137,23 @@ void JankTracker::dump(int fd) {
		}

		void JankTracker::reset() {
		memset(mBuckets, 0, sizeof(JankBucket) * NUM_BUCKETS);
		memset(mBuckets, 0, sizeof(mBuckets));
		memset(mFrameCounts, 0, sizeof(mFrameCounts));
		mTotalFrameCount = 0;
		mJankFrameCount = 0;
		}

		uint32_t JankTracker::findPercentile(int percentile) {
		int pos = percentile * mTotalFrameCount / 100;
		int remaining = mTotalFrameCount - pos;
		for (int i = sizeof(mFrameCounts) / sizeof(mFrameCounts[0]) - 1; i >= 0; i--) {
		remaining -= mFrameCounts[i];
		if (remaining <= 0) {
		return i;
		}
		}
		return 0;
		}

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

libs/hwui/JankTracker.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -54,8 +54,11 @@ public:
		void reset();

		private:
		uint32_t findPercentile(int p);

		JankBucket mBuckets[NUM_BUCKETS];
		int64_t mThresholds[NUM_BUCKETS];
		uint32_t mFrameCounts[128];

		int64_t mFrameInterval;
		uint32_t mTotalFrameCount;