зеркало из https://github.com/mozilla/gecko-dev.git
101 строка
3.0 KiB
C++
101 строка
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef mozilla_CPUUsageWatcher_h
|
|
#define mozilla_CPUUsageWatcher_h
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "mozilla/HangAnnotations.h"
|
|
#include "mozilla/Result.h"
|
|
|
|
// We only support OSX and Windows, because on Linux we're forced to read
|
|
// from /proc/stat in order to get global CPU values. We would prefer to not
|
|
// eat that cost for this.
|
|
#if defined(NIGHTLY_BUILD) && (defined(XP_WIN) || defined(XP_MACOSX))
|
|
# define CPU_USAGE_WATCHER_ACTIVE
|
|
#endif
|
|
|
|
namespace mozilla {
|
|
|
|
// Start error values at 1 to allow using the UnusedZero Result
|
|
// optimization.
|
|
enum CPUUsageWatcherError : uint8_t {
|
|
ClockGetTimeError = 1,
|
|
GetNumberOfProcessorsError,
|
|
GetProcessTimesError,
|
|
GetSystemTimesError,
|
|
HostStatisticsError,
|
|
ProcStatError,
|
|
};
|
|
|
|
namespace detail {
|
|
|
|
template <>
|
|
struct UnusedZero<CPUUsageWatcherError> : UnusedZeroEnum<CPUUsageWatcherError> {
|
|
};
|
|
|
|
} // namespace detail
|
|
|
|
class CPUUsageHangAnnotator : public BackgroundHangAnnotator {
|
|
public:
|
|
};
|
|
|
|
class CPUUsageWatcher : public BackgroundHangAnnotator {
|
|
public:
|
|
#ifdef CPU_USAGE_WATCHER_ACTIVE
|
|
CPUUsageWatcher()
|
|
: mInitialized(false),
|
|
mExternalUsageThreshold(0),
|
|
mExternalUsageRatio(0),
|
|
mProcessUsageTime(0),
|
|
mProcessUpdateTime(0),
|
|
mGlobalUsageTime(0),
|
|
mGlobalUpdateTime(0),
|
|
mNumCPUs(0) {}
|
|
#endif
|
|
|
|
Result<Ok, CPUUsageWatcherError> Init();
|
|
|
|
void Uninit();
|
|
|
|
// Updates necessary values to allow AnnotateHang to function. This must be
|
|
// called on some semi-regular basis, as it will calculate the mean CPU
|
|
// usage values between now and the last time it was called.
|
|
Result<Ok, CPUUsageWatcherError> CollectCPUUsage();
|
|
|
|
void AnnotateHang(BackgroundHangAnnotations& aAnnotations) final;
|
|
|
|
private:
|
|
#ifdef CPU_USAGE_WATCHER_ACTIVE
|
|
bool mInitialized;
|
|
// The threshold above which we will mark a hang as occurring under high
|
|
// external CPU usage conditions
|
|
float mExternalUsageThreshold;
|
|
// The CPU usage (0-1) external to our process, averaged between the two
|
|
// most recent monitor thread runs
|
|
float mExternalUsageRatio;
|
|
// The total cumulative CPU usage time by our process as of the last
|
|
// CollectCPUUsage or Startup
|
|
uint64_t mProcessUsageTime;
|
|
// A time value in the same units as mProcessUsageTime used to
|
|
// determine the ratio of CPU usage time to idle time
|
|
uint64_t mProcessUpdateTime;
|
|
// The total cumulative CPU usage time by all processes as of the last
|
|
// CollectCPUUsage or Startup
|
|
uint64_t mGlobalUsageTime;
|
|
// A time value in the same units as mGlobalUsageTime used to
|
|
// determine the ratio of CPU usage time to idle time
|
|
uint64_t mGlobalUpdateTime;
|
|
// The number of virtual cores on our machine
|
|
uint64_t mNumCPUs;
|
|
#endif
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_CPUUsageWatcher_h
|