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Remove telemetry probes to get detailed disk cache hit rate.

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Tag #21.
This commit is contained in:
wolfbeast 2018-09-30 04:39:37 +02:00 • committed by Roy Tam
commit b882e7c6be
7 changed files with 0 additions and 212 deletions
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95
netwerk/cache2/CacheFileUtils.cpp
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@ -401,101 +401,6 @@ ValidityMap::operator[](uint32_t aIdx)
return mMap.ElementAt(aIdx);
}
StaticMutex DetailedCacheHitTelemetry::sLock;
uint32_t DetailedCacheHitTelemetry::sRecordCnt = 0;
DetailedCacheHitTelemetry::HitRate DetailedCacheHitTelemetry::sHRStats[kNumOfRanges];
DetailedCacheHitTelemetry::HitRate::HitRate()
{
Reset();
}
void
DetailedCacheHitTelemetry::HitRate::AddRecord(ERecType aType)
{
if (aType == HIT) {
++mHitCnt;
} else {
++mMissCnt;
}
}
uint32_t
DetailedCacheHitTelemetry::HitRate::GetHitRateBucket(uint32_t aNumOfBuckets) const
{
uint32_t bucketIdx = (aNumOfBuckets * mHitCnt) / (mHitCnt + mMissCnt);
if (bucketIdx == aNumOfBuckets) { // make sure 100% falls into the last bucket
--bucketIdx;
}
return bucketIdx;
}
uint32_t
DetailedCacheHitTelemetry::HitRate::Count()
{
return mHitCnt + mMissCnt;
}
void
DetailedCacheHitTelemetry::HitRate::Reset()
{
mHitCnt = 0;
mMissCnt = 0;
}
// static
void
DetailedCacheHitTelemetry::AddRecord(ERecType aType, TimeStamp aLoadStart)
{
bool isUpToDate = false;
CacheIndex::IsUpToDate(&isUpToDate);
if (!isUpToDate) {
// Ignore the record when the entry file count might be incorrect
return;
}
uint32_t entryCount;
nsresult rv = CacheIndex::GetEntryFileCount(&entryCount);
if (NS_FAILED(rv)) {
return;
}
uint32_t rangeIdx = entryCount / kRangeSize;
if (rangeIdx >= kNumOfRanges) { // The last range has no upper limit.
rangeIdx = kNumOfRanges - 1;
}
uint32_t hitMissValue = 2 * rangeIdx; // 2 values per range
if (aType == MISS) { // The order is HIT, MISS
++hitMissValue;
}
StaticMutexAutoLock lock(sLock);
sHRStats[rangeIdx].AddRecord(aType);
++sRecordCnt;
if (sRecordCnt < kTotalSamplesReportLimit) {
return;
}
sRecordCnt = 0;
for (uint32_t i = 0; i < kNumOfRanges; ++i) {
if (sHRStats[i].Count() >= kHitRateSamplesReportLimit) {
// The telemetry enums are grouped by buckets as follows:
// Telemetry value : 0,1,2,3, ... ,19,20,21,22, ... ,398,399
// Hit rate bucket : 0,0,0,0, ... , 0, 1, 1, 1, ... , 19, 19
// Cache size range: 0,1,2,3, ... ,19, 0, 1, 2, ... , 18, 19
uint32_t bucketOffset = sHRStats[i].GetHitRateBucket(kHitRateBuckets) *
kNumOfRanges;
sHRStats[i].Reset();
}
}
}
void
FreeBuffer(void *aBuf) {
#ifndef NS_FREE_PERMANENT_DATA