The Tor Browser / file comparison
comparison: toolkit/components/telemetry/ThreadHangStats.h
toolkit/components/telemetry/ThreadHangStats.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:5c61cc78090c |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef mozilla_BackgroundHangTelemetry_h | |
| 7 #define mozilla_BackgroundHangTelemetry_h | |
| 8 | |
| 9 #include "mozilla/Array.h" | |
| 10 #include "mozilla/Assertions.h" | |
| 11 #include "mozilla/Move.h" | |
| 12 #include "mozilla/Mutex.h" | |
| 13 #include "mozilla/PodOperations.h" | |
| 14 #include "mozilla/Vector.h" | |
| 15 | |
| 16 #include "nsString.h" | |
| 17 #include "prinrval.h" | |
| 18 | |
| 19 namespace mozilla { | |
| 20 namespace Telemetry { | |
| 21 | |
| 22 static const size_t kTimeHistogramBuckets = 8 * sizeof(PRIntervalTime); | |
| 23 | |
| 24 /* TimeHistogram is an efficient histogram that puts time durations into | |
| 25 exponential (base 2) buckets; times are accepted in PRIntervalTime and | |
| 26 stored in milliseconds. */ | |
| 27 class TimeHistogram : public mozilla::Array<uint32_t, kTimeHistogramBuckets> | |
| 28 { | |
| 29 public: | |
| 30 TimeHistogram() | |
| 31 { | |
| 32 mozilla::PodArrayZero(*this); | |
| 33 } | |
| 34 // Get minimum (inclusive) range of bucket in milliseconds | |
| 35 uint32_t GetBucketMin(size_t aBucket) const { | |
| 36 MOZ_ASSERT(aBucket < ArrayLength(*this)); | |
| 37 return (1u << aBucket) & ~1u; // Bucket 0 starts at 0, not 1 | |
| 38 } | |
| 39 // Get maximum (inclusive) range of bucket in milliseconds | |
| 40 uint32_t GetBucketMax(size_t aBucket) const { | |
| 41 MOZ_ASSERT(aBucket < ArrayLength(*this)); | |
| 42 return (1u << (aBucket + 1u)) - 1u; | |
| 43 } | |
| 44 void Add(PRIntervalTime aTime); | |
| 45 }; | |
| 46 | |
| 47 /* A hang histogram consists of a stack associated with the | |
| 48 hang, along with a time histogram of the hang times. */ | |
| 49 class HangHistogram : public TimeHistogram | |
| 50 { | |
| 51 public: | |
| 52 typedef mozilla::Vector<const char*, 8> Stack; | |
| 53 | |
| 54 private: | |
| 55 static uint32_t GetHash(const Stack& aStack); | |
| 56 | |
| 57 Stack mStack; | |
| 58 // Use a hash to speed comparisons | |
| 59 const uint32_t mHash; | |
| 60 | |
| 61 public: | |
| 62 explicit HangHistogram(Stack&& aStack) | |
| 63 : mStack(mozilla::Move(aStack)) | |
| 64 , mHash(GetHash(mStack)) | |
| 65 { | |
| 66 } | |
| 67 HangHistogram(HangHistogram&& aOther) | |
| 68 : TimeHistogram(mozilla::Move(aOther)) | |
| 69 , mStack(mozilla::Move(aOther.mStack)) | |
| 70 , mHash(mozilla::Move(aOther.mHash)) | |
| 71 { | |
| 72 } | |
| 73 bool operator==(const HangHistogram& aOther) const; | |
| 74 bool operator!=(const HangHistogram& aOther) const | |
| 75 { | |
| 76 return !operator==(aOther); | |
| 77 } | |
| 78 const Stack& GetStack() const { | |
| 79 return mStack; | |
| 80 } | |
| 81 }; | |
| 82 | |
| 83 /* Thread hang stats consist of | |
| 84 - thread name | |
| 85 - time histogram of all task run times | |
| 86 - hang histograms of individual hangs. */ | |
| 87 class ThreadHangStats | |
| 88 { | |
| 89 private: | |
| 90 nsAutoCString mName; | |
| 91 | |
| 92 public: | |
| 93 TimeHistogram mActivity; | |
| 94 mozilla::Vector<HangHistogram, 4> mHangs; | |
| 95 | |
| 96 explicit ThreadHangStats(const char* aName) | |
| 97 : mName(aName) | |
| 98 { | |
| 99 } | |
| 100 ThreadHangStats(ThreadHangStats&& aOther) | |
| 101 : mName(mozilla::Move(aOther.mName)) | |
| 102 , mActivity(mozilla::Move(aOther.mActivity)) | |
| 103 , mHangs(mozilla::Move(aOther.mHangs)) | |
| 104 { | |
| 105 } | |
| 106 const char* GetName() const { | |
| 107 return mName.get(); | |
| 108 } | |
| 109 }; | |
| 110 | |
| 111 } // namespace Telemetry | |
| 112 } // namespace mozilla | |
| 113 #endif // mozilla_BackgroundHangTelemetry_h |
