82dbc7429f
This change moves the frame time history tracking code out of Layer and into a new class called FrameTracker. It also changes the tracking to use signal timestamps from fences when available for more accurate results. Change-Id: I323c5f075c58bf86ce363b52af885ad0f6365f2b
133 lines
4.1 KiB
C++
133 lines
4.1 KiB
C++
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// This is needed for stdint.h to define INT64_MAX in C++
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#define __STDC_LIMIT_MACROS
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#include <ui/Fence.h>
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#include <utils/String8.h>
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#include "FrameTracker.h"
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namespace android {
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FrameTracker::FrameTracker() :
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mOffset(0),
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mNumFences(0) {
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}
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void FrameTracker::setDesiredPresentTime(nsecs_t presentTime) {
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mFrameRecords[mOffset].desiredPresentTime = presentTime;
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}
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void FrameTracker::setFrameReadyTime(nsecs_t readyTime) {
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mFrameRecords[mOffset].frameReadyTime = readyTime;
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}
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void FrameTracker::setFrameReadyFence(const sp<Fence>& readyFence) {
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mFrameRecords[mOffset].frameReadyFence = readyFence;
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mNumFences++;
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}
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void FrameTracker::setActualPresentTime(nsecs_t presentTime) {
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mFrameRecords[mOffset].actualPresentTime = presentTime;
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}
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void FrameTracker::setActualPresentFence(const sp<Fence>& readyFence) {
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mFrameRecords[mOffset].actualPresentFence = readyFence;
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mNumFences++;
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}
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void FrameTracker::advanceFrame() {
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mOffset = (mOffset+1) % NUM_FRAME_RECORDS;
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mFrameRecords[mOffset].desiredPresentTime = INT64_MAX;
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mFrameRecords[mOffset].frameReadyTime = INT64_MAX;
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mFrameRecords[mOffset].actualPresentTime = INT64_MAX;
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if (mFrameRecords[mOffset].frameReadyFence != NULL) {
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// We're clobbering an unsignaled fence, so we need to decrement the
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// fence count.
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mFrameRecords[mOffset].frameReadyFence = NULL;
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mNumFences--;
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}
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if (mFrameRecords[mOffset].actualPresentFence != NULL) {
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// We're clobbering an unsignaled fence, so we need to decrement the
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// fence count.
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mFrameRecords[mOffset].actualPresentFence = NULL;
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mNumFences--;
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}
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// Clean up the signaled fences to keep the number of open fence FDs in
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// this process reasonable.
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processFences();
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}
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void FrameTracker::clear() {
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for (size_t i = 0; i < NUM_FRAME_RECORDS; i++) {
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mFrameRecords[i].desiredPresentTime = 0;
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mFrameRecords[i].frameReadyTime = 0;
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mFrameRecords[i].actualPresentTime = 0;
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mFrameRecords[i].frameReadyFence.clear();
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mFrameRecords[i].actualPresentFence.clear();
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}
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mNumFences = 0;
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}
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void FrameTracker::processFences() const {
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FrameRecord* records = const_cast<FrameRecord*>(mFrameRecords);
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int& numFences = const_cast<int&>(mNumFences);
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for (int i = 1; i < NUM_FRAME_RECORDS && numFences > 0; i++) {
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size_t idx = (mOffset+NUM_FRAME_RECORDS-i) % NUM_FRAME_RECORDS;
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const sp<Fence>& rfence = records[idx].frameReadyFence;
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if (rfence != NULL) {
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records[idx].frameReadyTime = rfence->getSignalTime();
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if (records[idx].frameReadyTime < INT64_MAX) {
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records[idx].frameReadyFence = NULL;
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numFences--;
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}
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}
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const sp<Fence>& pfence = records[idx].actualPresentFence;
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if (pfence != NULL) {
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records[idx].actualPresentTime = pfence->getSignalTime();
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if (records[idx].actualPresentTime < INT64_MAX) {
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records[idx].actualPresentFence = NULL;
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numFences--;
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}
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}
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}
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}
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void FrameTracker::dump(String8& result) const {
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processFences();
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const size_t o = mOffset;
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for (size_t i = 1; i < NUM_FRAME_RECORDS; i++) {
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const size_t index = (o+i) % NUM_FRAME_RECORDS;
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result.appendFormat("%lld\t%lld\t%lld\n",
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mFrameRecords[index].desiredPresentTime,
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mFrameRecords[index].actualPresentTime,
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mFrameRecords[index].frameReadyTime);
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}
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result.append("\n");
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}
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} // namespace android
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