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236 lines
8.8 KiB
236 lines
8.8 KiB
4 months ago
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/**
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* Copyright (c) 2020, 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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#ifndef CPP_WATCHDOG_SERVER_SRC_IOPERFCOLLECTION_H_
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#define CPP_WATCHDOG_SERVER_SRC_IOPERFCOLLECTION_H_
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#include "PackageInfoResolver.h"
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#include "ProcDiskStats.h"
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#include "ProcPidStat.h"
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#include "ProcStat.h"
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#include "UidIoStats.h"
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#include "WatchdogPerfService.h"
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#include <android-base/result.h>
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#include <cutils/multiuser.h>
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#include <gtest/gtest_prod.h>
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#include <utils/Errors.h>
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#include <utils/Mutex.h>
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#include <utils/RefBase.h>
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#include <ctime>
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#include <string>
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#include <unordered_set>
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#include <vector>
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namespace android {
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namespace automotive {
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namespace watchdog {
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// Number of periodic collection perf data snapshots to cache in memory.
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const int32_t kDefaultPeriodicCollectionBufferSize = 180;
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constexpr const char* kEmptyCollectionMessage = "No collection recorded\n";
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// Performance data collected from the `/proc/uid_io/stats` file.
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struct UidIoPerfData {
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struct Stats {
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userid_t userId = 0;
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std::string packageName;
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int64_t bytes[UID_STATES];
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int64_t fsync[UID_STATES];
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};
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std::vector<Stats> topNReads = {};
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std::vector<Stats> topNWrites = {};
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int64_t total[METRIC_TYPES][UID_STATES] = {{0}};
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};
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std::string toString(const UidIoPerfData& perfData);
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// Performance data collected from the `/proc/stats` file.
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struct SystemIoPerfData {
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uint64_t cpuIoWaitTime = 0;
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uint64_t totalCpuTime = 0;
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uint32_t ioBlockedProcessesCnt = 0;
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uint32_t totalProcessesCnt = 0;
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};
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std::string toString(const SystemIoPerfData& perfData);
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// Performance data collected from the `/proc/[pid]/stat` and `/proc/[pid]/task/[tid]/stat` files.
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struct ProcessIoPerfData {
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struct UidStats {
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userid_t userId = 0;
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std::string packageName;
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uint64_t count = 0;
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struct ProcessStats {
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std::string comm = "";
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uint64_t count = 0;
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};
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std::vector<ProcessStats> topNProcesses = {};
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};
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std::vector<UidStats> topNIoBlockedUids = {};
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// Total # of tasks owned by each UID in |topNIoBlockedUids|.
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std::vector<uint64_t> topNIoBlockedUidsTotalTaskCnt = {};
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std::vector<UidStats> topNMajorFaultUids = {};
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uint64_t totalMajorFaults = 0;
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// Percentage of increase/decrease in the major page faults since last collection.
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double majorFaultsPercentChange = 0.0;
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};
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std::string toString(const ProcessIoPerfData& data);
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struct IoPerfRecord {
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time_t time; // Collection time.
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UidIoPerfData uidIoPerfData;
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SystemIoPerfData systemIoPerfData;
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ProcessIoPerfData processIoPerfData;
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};
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std::string toString(const IoPerfRecord& record);
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struct CollectionInfo {
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size_t maxCacheSize = 0; // Maximum cache size for the collection.
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std::vector<IoPerfRecord> records; // Cache of collected performance records.
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};
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std::string toString(const CollectionInfo& collectionInfo);
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// Forward declaration for testing use only.
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namespace internal {
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class IoPerfCollectionPeer;
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} // namespace internal
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// IoPerfCollection implements the I/O performance data collection module.
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class IoPerfCollection : public IDataProcessorInterface {
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public:
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IoPerfCollection() :
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mTopNStatsPerCategory(0),
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mTopNStatsPerSubcategory(0),
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mPackageInfoResolver(PackageInfoResolver::getInstance()),
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mBoottimeCollection({}),
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mPeriodicCollection({}),
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mCustomCollection({}),
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mLastMajorFaults(0) {}
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~IoPerfCollection() { terminate(); }
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std::string name() { return "IoPerfCollection"; }
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// Implements IDataProcessorInterface.
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android::base::Result<void> onBoottimeCollection(time_t time,
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const android::wp<UidIoStats>& uidIoStats,
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const android::wp<ProcStat>& procStat,
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const android::wp<ProcPidStat>& procPidStat);
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android::base::Result<void> onPeriodicCollection(time_t time, SystemState systemState,
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const android::wp<UidIoStats>& uidIoStats,
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const android::wp<ProcStat>& procStat,
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const android::wp<ProcPidStat>& procPidStat);
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android::base::Result<void> onCustomCollection(
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time_t time, SystemState systemState,
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const std::unordered_set<std::string>& filterPackages,
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const android::wp<UidIoStats>& uidIoStats, const android::wp<ProcStat>& procStat,
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const android::wp<ProcPidStat>& procPidStat);
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android::base::Result<void> onPeriodicMonitor(
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[[maybe_unused]] time_t time,
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[[maybe_unused]] const android::wp<IProcDiskStatsInterface>& procDiskStats,
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[[maybe_unused]] const std::function<void()>& alertHandler) {
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// No monitoring done here as this DataProcessor only collects I/O performance records.
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return {};
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}
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android::base::Result<void> onDump(int fd);
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android::base::Result<void> onCustomCollectionDump(int fd);
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protected:
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android::base::Result<void> init();
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// Clears in-memory cache.
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void terminate();
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private:
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// Processes the collected data.
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android::base::Result<void> processLocked(time_t time,
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const std::unordered_set<std::string>& filterPackages,
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const android::wp<UidIoStats>& uidIoStats,
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const android::wp<ProcStat>& procStat,
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const android::wp<ProcPidStat>& procPidStat,
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CollectionInfo* collectionInfo);
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// Processes performance data from the `/proc/uid_io/stats` file.
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void processUidIoPerfData(const std::unordered_set<std::string>& filterPackages,
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const android::wp<UidIoStats>& uidIoStats,
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UidIoPerfData* uidIoPerfData) const;
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// Processes performance data from the `/proc/stats` file.
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void processSystemIoPerfData(const android::wp<ProcStat>& procStat,
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SystemIoPerfData* systemIoPerfData) const;
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// Processes performance data from the `/proc/[pid]/stat` and `/proc/[pid]/task/[tid]/stat`
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// files.
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void processProcessIoPerfDataLocked(const std::unordered_set<std::string>& filterPackages,
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const android::wp<ProcPidStat>& procPidStat,
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ProcessIoPerfData* processIoPerfData);
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// Top N per-UID stats per category.
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int mTopNStatsPerCategory;
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// Top N per-process stats per subcategory.
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int mTopNStatsPerSubcategory;
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// Local IPackageInfoResolver instance. Useful to mock in tests.
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sp<IPackageInfoResolver> mPackageInfoResolver;
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// Makes sure only one collection is running at any given time.
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Mutex mMutex;
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// Info for the boot-time collection event. The cache is persisted until system shutdown/reboot.
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CollectionInfo mBoottimeCollection GUARDED_BY(mMutex);
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// Info for the periodic collection event. The cache size is limited by
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// |ro.carwatchdog.periodic_collection_buffer_size|.
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CollectionInfo mPeriodicCollection GUARDED_BY(mMutex);
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// Info for the custom collection event. The info is cleared at the end of every custom
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// collection.
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CollectionInfo mCustomCollection GUARDED_BY(mMutex);
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// Major faults delta from last collection. Useful when calculating the percentage change in
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// major faults since last collection.
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uint64_t mLastMajorFaults GUARDED_BY(mMutex);
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friend class WatchdogPerfService;
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// For unit tests.
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friend class internal::IoPerfCollectionPeer;
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FRIEND_TEST(IoPerfCollectionTest, TestUidIoStatsGreaterThanTopNStatsLimit);
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FRIEND_TEST(IoPerfCollectionTest, TestUidIOStatsLessThanTopNStatsLimit);
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FRIEND_TEST(IoPerfCollectionTest, TestProcessSystemIoPerfData);
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FRIEND_TEST(IoPerfCollectionTest, TestProcPidContentsGreaterThanTopNStatsLimit);
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FRIEND_TEST(IoPerfCollectionTest, TestProcPidContentsLessThanTopNStatsLimit);
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};
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} // namespace watchdog
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} // namespace automotive
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} // namespace android
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#endif // CPP_WATCHDOG_SERVER_SRC_IOPERFCOLLECTION_H_
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