Merge "Thermal shutdown fix: cool down on writing to disk" into pi-dev

#define STATS_DATA_DIR "/data/misc/stats-data"

// Cool down period for writing data to disk to avoid overwriting files.

#define WRITE_DATA_COOL_DOWN_SEC 5

StatsLogProcessor::StatsLogProcessor(const sp<UidMap>& uidMap,

                                     const sp<AlarmMonitor>& anomalyAlarmMonitor,

                                     const sp<AlarmMonitor>& periodicAlarmMonitor,

void StatsLogProcessor::WriteDataToDiskLocked(const DumpReportReason dumpReportReason) {

    const int64_t timeNs = getElapsedRealtimeNs();

    // Do not write to disk if we already have in the last few seconds.

    // This is to avoid overwriting files that would have the same name if we

    //   write twice in the same second.

    if (static_cast<unsigned long long> (timeNs) <

            mLastWriteTimeNs + WRITE_DATA_COOL_DOWN_SEC * NS_PER_SEC) {

        ALOGI("Statsd skipping writing data to disk. Already wrote data in last %d seconds",

                WRITE_DATA_COOL_DOWN_SEC);

        return;

    }

    mLastWriteTimeNs = timeNs;

    for (auto& pair : mMetricsManagers) {

        WriteDataToDiskLocked(pair.first, timeNs, dumpReportReason);

    }

    long mLastPullerCacheClearTimeSec = 0;

    // Last time we wrote data to disk.

    int64_t mLastWriteTimeNs = 0;

#ifdef VERY_VERBOSE_PRINTING

    bool mPrintAllLogs = false;

#endif