audioserver: add automated audio power logging (88a7afe4) · Commits · e / devices / smdk4412 / android_frameworks_av

media/psh_utils/Android.bp

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		@@ -19,18 +19,23 @@ cc_library {
		local_include_dirs: ["include"],
		export_include_dirs: ["include"],
		srcs: [
		"AudioPowerManager.cpp",
		"AudioToken.cpp",
		"HealthStats.cpp",
		"HealthStatsProvider.cpp",
		"PowerClientStats.cpp",
		"PowerStats.cpp",
		"PowerStatsCollector.cpp",
		"PowerStatsProvider.cpp",
		],
		shared_libs: [
		"com.android.media.audio-aconfig-cc",
		"libaudioutils",
		"libbase",
		"libbinder_ndk",
		"libcutils",
		"liblog",
		"libmediautils",
		"libutils",
		],
		cflags: [

media/psh_utils/AudioPowerManager.cpp

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		/*
		* Copyright (C) 2024 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.
		*/

		#include "AudioToken.h"
		#define LOG_TAG "AudioPowerManager"
		#include <com_android_media_audioserver.h>
		#include <cutils/properties.h>
		#include <utils/Log.h>
		#include <psh_utils/AudioPowerManager.h>

		namespace android::media::psh_utils {

		/* static */
		AudioPowerManager& AudioPowerManager::getAudioPowerManager() {
		[[clang::no_destroy]] static AudioPowerManager apm;
		return apm;
		}

		std::unique_ptr<Token> AudioPowerManager::startClient(pid_t pid, uid_t uid,
		const std::string& additional) {
		std::shared_ptr<PowerClientStats> powerClientStats;
		std::lock_guard l(mMutex);
		if (mPowerClientStats.count(uid) == 0) {
		const auto it = mHistoricalClients.find(uid);
		if (it == mHistoricalClients.end()) {
		powerClientStats = std::make_shared<PowerClientStats>(uid, additional);
		} else {
		powerClientStats = it->second;
		mHistoricalClients.erase(it);
		}
		mPowerClientStats[uid] = powerClientStats;
		} else {
		powerClientStats = mPowerClientStats[uid];
		}
		powerClientStats->addPid(pid);
		mPidToUid[pid] = uid;
		std::unique_ptr<Token> token =
		std::make_unique<AudioClientToken>(powerClientStats, pid, uid, additional);
		mOutstandingTokens.emplace(token.get());
		return token;
		}

		std::unique_ptr<Token> AudioPowerManager::startTrack(uid_t uid, const std::string& additional) {
		std::lock_guard l(mMutex);
		if (mPowerClientStats.count(uid) == 0) {
		ALOGW("%s: Cannot find uid: %d", __func__, uid);
		return {};
		}
		auto powerClientStats = mPowerClientStats[uid];
		std::unique_ptr<Token> token =
		std::make_unique<AudioTrackToken>(powerClientStats, additional);
		mOutstandingTokens.emplace(token.get());
		return token;
		}

		std::unique_ptr<Token> AudioPowerManager::startThread(
		pid_t pid, const std::string& wakeLockName,
		WakeFlag wakeFlag, const std::string& additional) {
		std::lock_guard l(mMutex);
		std::unique_ptr<Token> token =
		std::make_unique<AudioThreadToken>(pid, wakeLockName, wakeFlag, additional);
		mOutstandingTokens.emplace(token.get());
		return token;
		}

		std::string AudioPowerManager::toString() const {
		const std::string prefix(" ");
		std::string result;
		std::lock_guard l(mMutex);
		result.append("Power Tokens:\n");
		std::vector<std::string> tokenInfo;
		for (const auto& token: mOutstandingTokens) {
		tokenInfo.emplace_back(token->toString());
		}
		std::sort(tokenInfo.begin(), tokenInfo.end());
		for (const auto& info: tokenInfo) {
		result.append(prefix).append(info).append("\n");
		}
		result.append("Power Clients:\n");
		for (const auto& [uid, powerClientStats]: mPowerClientStats) {
		result.append(powerClientStats->toString(true, prefix));
		}
		result.append("Power Client History:\n");
		for (const auto& [power, powerClientStats]: mHistoricalClients) {
		result.append(powerClientStats->toString(true, prefix));
		}
		return result;
		}

		void AudioPowerManager::stopClient(pid_t pid) {
		std::lock_guard l(mMutex);
		const auto pidit = mPidToUid.find(pid);
		if (pidit == mPidToUid.end()) return;
		const uid_t uid = pidit->second;
		const auto it = mPowerClientStats.find(uid);
		if (it == mPowerClientStats.end()) return;

		auto powerClientStats = it->second;
		size_t count = powerClientStats->removePid(pid);
		if (count == 0) {
		mHistoricalClients[uid] = powerClientStats;
		mPowerClientStats.erase(it);
		if (mHistoricalClients.size() > kHistory) {
		mHistoricalClients.erase(mHistoricalClients.begin()); // remove oldest.
		}
		}
		mPidToUid.erase(pid);
		}

		void AudioPowerManager::clear_token_ptr(Token* token) {
		if (token != nullptr) {
		std::lock_guard l(mMutex);
		(void)mOutstandingTokens.erase(token);
		}
		}

		/* static */
		bool AudioPowerManager::enabled() {
		static const bool enabled = com::android::media::audioserver::power_stats()
		&& property_get_bool("persist.audio.power_stats.enabled", false);
		return enabled;
		}

		} // namespace android::media::psh_utils

media/psh_utils/AudioToken.cpp

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		/*
		* Copyright (C) 2024 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 "AudioToken"
		#include <android-base/logging.h>
		#include <utils/Log.h>
		#include "AudioToken.h"
		#include <psh_utils/AudioPowerManager.h>

		namespace android::media::psh_utils {

		/* static */
		constinit std::atomic<size_t> AudioClientToken::sIdCounter{};

		AudioClientToken::AudioClientToken(
		std::shared_ptr<PowerClientStats> powerClientStats, pid_t pid, uid_t uid,
		const std::string& additional)
		: mPowerClientStats(std::move(powerClientStats))
		, mPid(pid)
		, mAdditional(additional)
		, mId(sIdCounter.fetch_add(1, std::memory_order_relaxed)) {
		(void)uid;
		}

		AudioClientToken::~AudioClientToken() {
		auto& apm = AudioPowerManager::getAudioPowerManager();

		// APM has a back pointer to AudioToken, which is accessible on toString().
		// We first remove ourselves to prevent use after free.
		apm.clear_token_ptr(this);
		apm.stopClient(mPid);
		}

		std::string AudioClientToken::toString() const {
		std::string result("Client-");
		result.append(std::to_string(mId)).append(": ")
		.append(" pid: ").append(std::to_string(mPid));
		if (!mAdditional.empty()) {
		result.append(" ").append(mAdditional);
		}
		return result;
		}

		std::unique_ptr<Token> createAudioClientToken(pid_t pid, uid_t uid,
		const std::string& additional) {
		return AudioPowerManager::getAudioPowerManager().startClient(pid, uid, additional);
		}

		/* static */
		constinit std::atomic<size_t> AudioThreadToken::sIdCounter{};

		AudioThreadToken::AudioThreadToken(
		pid_t tid, const std::string& wakeLockName,
		WakeFlag wakeFlag, const std::string& additional)
		: mTid(tid)
		, mWakeLockName(wakeLockName)
		, mWakeFlag(wakeFlag)
		, mAdditional(additional)
		, mId(sIdCounter.fetch_add(1, std::memory_order_relaxed)) {
		}

		AudioThreadToken::~AudioThreadToken() {
		auto& apm = AudioPowerManager::getAudioPowerManager();

		// APM has a back pointer to AudioToken, which is accessible on toString().
		// We first remove ourselves to prevent use after free.
		apm.clear_token_ptr(this);
		}

		std::string AudioThreadToken::toString() const {
		std::string result("Thread-");
		result.append(std::to_string(mId)).append(": ")
		.append(" ThreadBase-tid: ").append(std::to_string(mTid))
		.append(" wakeLockName: ").append(mWakeLockName)
		.append(" wakeFlag: ").append(::android::media::psh_utils::toString(mWakeFlag));
		if (!mAdditional.empty()) {
		result.append(" ").append(mAdditional);
		}
		return result;
		}

		std::unique_ptr<Token> createAudioThreadToken(
		pid_t pid, const std::string& wakeLockName,
		WakeFlag wakeFlag, const std::string& additional) {
		return AudioPowerManager::getAudioPowerManager().startThread(
		pid, wakeLockName, wakeFlag, additional);
		}

		/* static */
		constinit std::atomic<size_t> AudioTrackToken::sIdCounter{};

		AudioTrackToken::AudioTrackToken(
		std::shared_ptr<PowerClientStats> powerClientStats, const std::string& additional)
		: mPowerClientStats(std::move(powerClientStats))
		, mAdditional(additional)
		, mId(sIdCounter.fetch_add(1, std::memory_order_relaxed)) {
		if (mPowerClientStats){
		mPowerClientStats->getCommandThread().add(
		"start",
		[pas = mPowerClientStats, actualNs = systemTime(SYSTEM_TIME_BOOTTIME)]() {
		pas->start(actualNs);
		});
		}
		}

		AudioTrackToken::~AudioTrackToken() {
		// APM has a back pointer to AudioToken, which is accessible on toString().
		// We first remove ourselves to prevent use after free.
		AudioPowerManager::getAudioPowerManager().clear_token_ptr(this);
		if (mPowerClientStats) {
		mPowerClientStats->getCommandThread().add(
		"stop",
		[pas = mPowerClientStats, actualNs = systemTime(SYSTEM_TIME_BOOTTIME)]() {
		pas->stop(actualNs);
		});
		}
		}

		std::string AudioTrackToken::toString() const {
		std::string result("Track-");
		result.append(std::to_string(mId)).append(": ")
		.append(mPowerClientStats ? mPowerClientStats->toString() : std::string("null"));
		if (!mAdditional.empty()) {
		result.append(" ").append(mAdditional);
		}
		return result;
		}

		std::unique_ptr<Token> createAudioTrackToken(uid_t uid, const std::string& additional) {
		return AudioPowerManager::getAudioPowerManager().startTrack(uid, additional);
		}


		} // namespace android::media::psh_utils

media/psh_utils/AudioToken.h

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		/*
		* Copyright (C) 2024 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.
		*/

		#pragma once

		#include <psh_utils/PowerClientStats.h>
		#include <psh_utils/Token.h>

		#include <atomic>
		#include <memory>
		#include <string>

		namespace android::media::psh_utils {

		class AudioClientToken : public Token {
		public:
		AudioClientToken(std::shared_ptr<PowerClientStats> powerClientStats, pid_t pid, uid_t uid,
		const std::string& additional);
		~AudioClientToken() override;

		// AudioPowerManager may call toString() while AudioToken is in its dtor.
		// It is safe so long as toString is final.
		std::string toString() const final;

		private:
		const std::shared_ptr<PowerClientStats> mPowerClientStats;
		const pid_t mPid;
		const std::string mAdditional;
		const size_t mId;
		static constinit std::atomic<size_t> sIdCounter;
		};

		class AudioThreadToken : public Token {
		public:
		AudioThreadToken(
		pid_t tid, const std::string& wakeLockName,
		WakeFlag wakeFlag, const std::string& additional);
		~AudioThreadToken() override;

		// AudioPowerManager may call toString() while AudioToken is in its dtor.
		// It is safe so long as toString is final.
		std::string toString() const final;

		private:
		const pid_t mTid;
		const std::string mWakeLockName;
		const WakeFlag mWakeFlag;
		const std::string mAdditional;
		const size_t mId;
		static constinit std::atomic<size_t> sIdCounter;
		};

		class AudioTrackToken : public Token {
		public:
		AudioTrackToken(
		std::shared_ptr<PowerClientStats> powerClientStats, const std::string& additional);
		~AudioTrackToken() override;

		// AudioPowerManager may call toString() while AudioToken is in its dtor.
		// It is safe so long as toString is final.
		std::string toString() const final;

		private:
		const std::shared_ptr<PowerClientStats> mPowerClientStats;
		const std::string mAdditional;
		const size_t mId;
		static constinit std::atomic<size_t> sIdCounter;
		};

		} // namespace android::media::psh_utils

media/psh_utils/PowerClientStats.cpp

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		/*
		* Copyright (C) 2024 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.
		*/

		#include <psh_utils/PowerClientStats.h>
		#include <mediautils/ServiceUtilities.h>

		namespace android::media::psh_utils {

		/* static */
		audio_utils::CommandThread& PowerClientStats::getCommandThread() {
		[[clang::no_destroy]] static audio_utils::CommandThread ct;
		return ct;
		}

		PowerClientStats::PowerClientStats(uid_t uid, const std::string& additional)
		: mUid(uid), mAdditional(additional) {}

		void PowerClientStats::start(int64_t actualNs) {
		std::lock_guard l(mMutex);
		++mTokenCount;
		if (mStartNs == 0) mStartNs = actualNs;
		if (mStartStats) return;
		mStartStats = PowerStatsCollector::getCollector().getStats(kStatTimeToleranceNs);
		}

		void PowerClientStats::stop(int64_t actualNs) {
		std::lock_guard l(mMutex);
		if (--mTokenCount > 0) return;
		if (mStartNs != 0) mDeltaNs += actualNs - mStartNs;
		mStartNs = 0;
		if (!mStartStats) return;
		const auto stopStats = PowerStatsCollector::getCollector().getStats(kStatTimeToleranceNs);
		if (stopStats && stopStats != mStartStats) {
		mDeltaStats += stopStats - *mStartStats;
		}
		mStartStats.reset();
		}

		void PowerClientStats::addPid(pid_t pid) {
		std::lock_guard l(mMutex);
		mPids.emplace(pid);
		}

		size_t PowerClientStats::removePid(pid_t pid) {
		std::lock_guard l(mMutex);
		mPids.erase(pid);
		return mPids.size();
		}

		std::string PowerClientStats::toString(bool stats, const std::string& prefix) const {
		std::lock_guard l(mMutex);

		// Adjust delta time and stats if currently running.
		auto deltaStats = mDeltaStats;
		auto deltaNs = mDeltaNs;
		if (mStartNs) deltaNs += systemTime(SYSTEM_TIME_BOOTTIME) - mStartNs;
		if (mStartStats) {
		const auto stopStats = PowerStatsCollector::getCollector().getStats(kStatTimeToleranceNs);
		if (stopStats && stopStats != mStartStats) {
		auto newStats = std::make_shared<PowerStats>(*deltaStats);
		newStats += stopStats - *mStartStats;
		deltaStats = newStats;
		}
		}

		std::string result(prefix);
		result.append("uid: ")
		.append(std::to_string(mUid))
		.append(" ").append(mediautils::UidInfo::getInfo(mUid)->package)
		.append(" streams: ").append(std::to_string(mTokenCount))
		.append(" seconds: ").append(std::to_string(deltaNs * 1e-9));
		result.append(" {");
		for (auto pid : mPids) {
		result.append(" ").append(std::to_string(pid));
		}
		result.append(" }");
		if (!mAdditional.empty()) {
		result.append("\n").append(prefix).append(mAdditional);
		}
		if (stats) {
		std::string prefix2(prefix);
		prefix2.append(" ");
		result.append("\n").append(deltaStats->normalizedEnergy(prefix2));
		}
		return result;
		}

		} // namespace android::media::psh_utils