132 lines
5.0 KiB
C++
132 lines
5.0 KiB
C++
/*
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* Copyright (C) 2021 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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#define LOG_TAG "powerhal-adaptivecpu"
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#define ATRACE_TAG (ATRACE_TAG_POWER | ATRACE_TAG_HAL)
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#include "AdaptiveCpuStats.h"
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#include <utils/Trace.h>
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#include "AdaptiveCpu.h"
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using std::chrono_literals::operator""ns;
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namespace aidl {
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namespace google {
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namespace hardware {
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namespace power {
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namespace impl {
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namespace pixel {
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void AdaptiveCpuStats::RegisterStartRun() {
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ATRACE_CALL();
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mNumStartedRuns++;
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mLastRunStartTime = mTimeSource->GetTime();
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if (mStartTime == 0ns) {
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mStartTime = mLastRunStartTime;
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}
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}
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void AdaptiveCpuStats::RegisterSuccessfulRun(ThrottleDecision previousThrottleDecision,
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ThrottleDecision throttleDecision,
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WorkDurationFeatures workDurationFeatures,
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const AdaptiveCpuConfig &config) {
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ATRACE_CALL();
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mNumSuccessfulRuns++;
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mNumThrottles[throttleDecision]++;
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const auto runSuccessTime = mTimeSource->GetTime();
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mTotalRunDuration += runSuccessTime - mLastRunStartTime;
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// Don't update previousThrottleDecision entries if we haven't run successfully before.
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if (mLastRunSuccessTime != 0ns) {
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mThrottleDurations[previousThrottleDecision] +=
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std::min(runSuccessTime - mLastRunSuccessTime,
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std::chrono::duration_cast<std::chrono::nanoseconds>(config.hintTimeout));
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mNumDurations[previousThrottleDecision] += workDurationFeatures.numDurations;
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mNumMissedDeadlines[previousThrottleDecision] += workDurationFeatures.numMissedDeadlines;
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}
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mLastRunSuccessTime = runSuccessTime;
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}
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void AdaptiveCpuStats::DumpToStream(std::ostream &stream) const {
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stream << "Stats:\n";
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stream << "- Successful runs / total runs: " << mNumSuccessfulRuns << " / " << mNumStartedRuns
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<< "\n";
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stream << "- Total run duration: " << FormatDuration(mTotalRunDuration) << "\n";
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stream << "- Average run duration: " << FormatDuration(mTotalRunDuration / mNumSuccessfulRuns)
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<< "\n";
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stream << "- Running time fraction: "
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<< static_cast<double>(mTotalRunDuration.count()) /
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(mTimeSource->GetTime() - mStartTime).count()
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<< "\n";
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stream << "- Number of throttles:\n";
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size_t totalNumThrottles = 0;
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for (const auto &[throttleDecision, numThrottles] : mNumThrottles) {
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stream << " - " << ThrottleString(throttleDecision) << ": " << numThrottles << "\n";
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totalNumThrottles += numThrottles;
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}
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stream << " - Total: " << totalNumThrottles << "\n";
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stream << "- Time spent throttling:\n";
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std::chrono::nanoseconds totalThrottleDuration;
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for (const auto &[throttleDecision, throttleDuration] : mThrottleDurations) {
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stream << " - " << ThrottleString(throttleDecision) << ": "
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<< FormatDuration(throttleDuration) << "\n";
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totalThrottleDuration += throttleDuration;
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}
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stream << " - Total: " << FormatDuration(totalThrottleDuration) << "\n";
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stream << "- Missed deadlines per throttle:\n";
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size_t totalNumDurations = 0;
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size_t totalNumMissedDeadlines = 0;
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for (const auto &[throttleDecision, numDurations] : mNumDurations) {
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const size_t numMissedDeadlines = mNumMissedDeadlines.at(throttleDecision);
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stream << " - " << ThrottleString(throttleDecision) << ": " << numMissedDeadlines << " / "
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<< numDurations << " (" << static_cast<double>(numMissedDeadlines) / numDurations
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<< ")\n";
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totalNumDurations += numDurations;
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totalNumMissedDeadlines += numMissedDeadlines;
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}
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stream << " - Total: " << totalNumMissedDeadlines << " / " << totalNumDurations << " ("
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<< static_cast<double>(totalNumMissedDeadlines) / totalNumDurations << ")\n";
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}
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std::string AdaptiveCpuStats::FormatDuration(std::chrono::nanoseconds duration) {
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double count = static_cast<double>(duration.count());
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std::string suffix;
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if (count < 1000.0) {
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suffix = "ns";
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} else if (count < 1000.0 * 1000) {
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suffix = "us";
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count /= 1000;
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} else if (count < 1000.0 * 1000 * 100) {
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suffix = "ms";
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count /= 1000 * 1000;
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} else {
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suffix = "s";
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count /= 1000 * 1000 * 1000;
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}
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return std::to_string(count) + suffix;
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}
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} // namespace pixel
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} // namespace impl
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} // namespace power
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} // namespace hardware
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} // namespace google
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} // namespace aidl
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