135 lines
4.3 KiB
C++
135 lines
4.3 KiB
C++
/*
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* Copyright 2022 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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#include "FrameStatistics.h"
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#include "SwappyCommon.h"
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#define LOG_TAG "FrameStatistics"
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#include "SwappyLog.h"
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namespace swappy {
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// NB This is only needed for C++14
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constexpr std::chrono::nanoseconds FrameStatistics::LOG_EVERY_N_NS;
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int32_t FrameStatistics::getFrameDelta(int64_t deltaTimeNS,
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uint64_t refreshPeriod) {
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int32_t numFrames = deltaTimeNS / refreshPeriod;
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numFrames = std::max(
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0, std::min(numFrames, static_cast<int32_t>(MAX_FRAME_BUCKETS) - 1));
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return numFrames;
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}
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void FrameStatistics::clearStats() {
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std::lock_guard<std::mutex> lock(mMutex);
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mStats.totalFrames = 0;
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for (int i = 0; i < MAX_FRAME_BUCKETS; i++) {
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mStats.idleFrames[i] = 0;
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mStats.lateFrames[i] = 0;
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mStats.offsetFromPreviousFrame[i] = 0;
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mStats.latencyFrames[i] = 0;
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}
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}
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void FrameStatistics::invalidateLastFrame() { mLast = {0, 0, 0, 0}; }
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void FrameStatistics::updateFrameStats(FrameTimings current,
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uint64_t refreshPeriod) {
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std::lock_guard<std::mutex> lock(mMutex);
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// Latency is always collected
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int latency = getFrameDelta(
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current.actualPresentTime - current.startFrameTime, refreshPeriod);
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// Use incoming frame timings to build the histogram.
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if (mFullStatsEnabled) {
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int idle = getFrameDelta(current.presentMargin, refreshPeriod);
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int late = getFrameDelta(
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current.actualPresentTime - current.desiredPresentTime,
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refreshPeriod);
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mStats.totalFrames++;
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mStats.idleFrames[idle]++;
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mStats.lateFrames[late]++;
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mStats.latencyFrames[latency]++;
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// Update the previous frame only if last frame has valid data
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if (mLast.actualPresentTime) {
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int offset = getFrameDelta(
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current.actualPresentTime - mLast.actualPresentTime,
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refreshPeriod);
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mStats.offsetFromPreviousFrame[offset]++;
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}
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logFrames();
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}
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mLastLatency = latency;
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mLast = current;
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}
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void FrameStatistics::logFrames() {
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static auto previousLogTime = std::chrono::steady_clock::now();
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if (std::chrono::steady_clock::now() - previousLogTime < LOG_EVERY_N_NS) {
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return;
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}
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std::string message;
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SWAPPY_LOGI("== Frame statistics ==");
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SWAPPY_LOGI("total frames: %" PRIu64, mStats.totalFrames);
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message += "Buckets: ";
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for (int i = 0; i < MAX_FRAME_BUCKETS; i++)
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message += "\t[" + swappy::to_string(i) + "]";
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SWAPPY_LOGI("%s", message.c_str());
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message = "";
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message += "idle frames: ";
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for (int i = 0; i < MAX_FRAME_BUCKETS; i++)
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message += "\t " + swappy::to_string(mStats.idleFrames[i]);
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SWAPPY_LOGI("%s", message.c_str());
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message = "";
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message += "late frames: ";
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for (int i = 0; i < MAX_FRAME_BUCKETS; i++)
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message += "\t " + swappy::to_string(mStats.lateFrames[i]);
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SWAPPY_LOGI("%s", message.c_str());
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message = "";
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message += "offset from previous frame: ";
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for (int i = 0; i < MAX_FRAME_BUCKETS; i++)
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message += "\t " + swappy::to_string(mStats.offsetFromPreviousFrame[i]);
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SWAPPY_LOGI("%s", message.c_str());
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message = "";
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message += "frame latency: ";
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for (int i = 0; i < MAX_FRAME_BUCKETS; i++)
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message += "\t " + swappy::to_string(mStats.latencyFrames[i]);
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SWAPPY_LOGI("%s", message.c_str());
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previousLogTime = std::chrono::steady_clock::now();
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}
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void FrameStatistics::enableStats(bool enabled) { mFullStatsEnabled = enabled; }
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SwappyStats FrameStatistics::getStats() {
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std::lock_guard<std::mutex> lock(mMutex);
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return mStats;
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}
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} // namespace swappy
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