Remove telemetry probes to get detailed disk cache hit rate.

Tag #21.

1 files changed, 0 insertions, 59 deletions

diff --git a/netwerk/cache2/CacheFileUtils.h b/netwerk/cache2/CacheFileUtils.h
index 13acfd71d..b66f0adf1 100644
--- a/netwerk/cache2/CacheFileUtils.h
+++ b/netwerk/cache2/CacheFileUtils.h
@@ -10,7 +10,6 @@
 #include "nsString.h"
 #include "nsTArray.h"
 #include "mozilla/StaticMutex.h"
-#include "mozilla/TimeStamp.h"
 
 class nsILoadContextInfo;
 class nsACString;
@@ -90,64 +89,6 @@ private:
   nsTArray<ValidityPair> mMap;
 };
 
-
-class DetailedCacheHitTelemetry {
-public:
-  enum ERecType {
-    HIT  = 0,
-    MISS = 1
-  };
-
-  static void AddRecord(ERecType aType, TimeStamp aLoadStart);
-
-private:
-  class HitRate {
-  public:
-    HitRate();
-
-    void     AddRecord(ERecType aType);
-    // Returns the bucket index that the current hit rate falls into according
-    // to the given aNumOfBuckets.
-    uint32_t GetHitRateBucket(uint32_t aNumOfBuckets) const;
-    uint32_t Count();
-    void     Reset();
-
-  private:
-    uint32_t mHitCnt;
-    uint32_t mMissCnt;
-  };
-
-  // Group the hits and misses statistics by cache files count ranges (0-5000,
-  // 5001-10000, ... , 95001- )
-  static const uint32_t kRangeSize = 5000;
-  static const uint32_t kNumOfRanges = 20;
-
-  // Use the same ranges to report an average hit rate. Report the hit rates
-  // (and reset the counters) every kTotalSamplesReportLimit samples.
-  static const uint32_t kTotalSamplesReportLimit = 1000;
-
-  // Report hit rate for a given cache size range only if it contains
-  // kHitRateSamplesReportLimit or more samples. This limit should avoid
-  // reporting a biased statistics.
-  static const uint32_t kHitRateSamplesReportLimit = 500;
-
-  // All hit rates are accumulated in a single telemetry probe, so to use
-  // a sane number of enumerated values the hit rate is divided into buckets
-  // instead of using a percent value. This constant defines number of buckets
-  // that we divide the hit rates into. I.e. we'll report ranges 0%-5%, 5%-10%,
-  // 10-%15%, ...
-  static const uint32_t kHitRateBuckets = 20;
-
-  // Protects sRecordCnt and sHitStats calls.
-  static StaticMutex sLock;
-
-  // Counter of samples that is compared against kTotalSamplesReportLimit.
-  static uint32_t sRecordCnt;
- 
-  // Hit rate statistics for every cache size range.
-  static HitRate sHRStats[kNumOfRanges];
-};
-
 void
 FreeBuffer(void *aBuf);