xpcom/threads/PerformanceCounter.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/Logging.h"
   8 #include "mozilla/PerformanceCounter.h"
   9
  10 using mozilla::DispatchCategory;
  11 using mozilla::DispatchCounter;
  12 using mozilla::PerformanceCounter;
  13
  14 static mozilla::LazyLogModule sPerformanceCounter("PerformanceCounter");
  15 #ifdef LOG
  16 #  undef LOG
  17 #endif
  18 #define LOG(args) MOZ_LOG(sPerformanceCounter, mozilla::LogLevel::Debug, args)
  19
  20 // Global counter used by PerformanceCounter CTOR via NextCounterID().
  21 static mozilla::Atomic<uint64_t> gNextCounterID(0);
  22
  23 static uint64_t NextCounterID() {
  24   // This can return the same value on different processes but
  25   // we're fine with this behavior because consumers can use a (pid, counter_id)
  26   // tuple to make instances globally unique in a browser session.
  27   return ++gNextCounterID;
  28 }
  29
  30 // this instance is the extension for the worker
  31 const DispatchCategory DispatchCategory::Worker =
  32     DispatchCategory((uint32_t)TaskCategory::Count);
  33
  34 PerformanceCounter::PerformanceCounter(const nsACString& aName)
  35     : mExecutionDuration(0),
  36       mTotalDispatchCount(0),
  37       mDispatchCounter(),
  38       mName(aName),
  39       mID(NextCounterID()) {
  40   LOG(("PerformanceCounter created with ID %" PRIu64, mID));
  41 }
  42
  43 void PerformanceCounter::IncrementDispatchCounter(DispatchCategory aCategory) {
  44   mDispatchCounter[aCategory.GetValue()] += 1;
  45   mTotalDispatchCount += 1;
  46   LOG(("[%s][%" PRIu64 "] Total dispatch %" PRIu64, mName.get(), GetID(),
  47        uint64_t(mTotalDispatchCount)));
  48 }
  49
  50 void PerformanceCounter::IncrementExecutionDuration(uint32_t aMicroseconds) {
  51   mExecutionDuration += aMicroseconds;
  52   LOG(("[%s][%" PRIu64 "] Total duration %" PRIu64, mName.get(), GetID(),
  53        uint64_t(mExecutionDuration)));
  54 }
  55
  56 const DispatchCounter& PerformanceCounter::GetDispatchCounter() const {
  57   return mDispatchCounter;
  58 }
  59
  60 uint64_t PerformanceCounter::GetExecutionDuration() const {
  61   return mExecutionDuration;
  62 }
  63
  64 uint64_t PerformanceCounter::GetTotalDispatchCount() const {
  65   return mTotalDispatchCount;
  66 }
  67
  68 uint32_t PerformanceCounter::GetDispatchCount(
  69     DispatchCategory aCategory) const {
  70   return mDispatchCounter[aCategory.GetValue()];
  71 }
  72
  73 uint64_t PerformanceCounter::GetID() const { return mID; }