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