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/* 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 TOOLS_PROFILERCPUFREQ_H_
#define TOOLS_PROFILERCPUFREQ_H_
#include "PlatformMacros.h"
#include "mozilla/Vector.h"
#if defined(GP_OS_windows) || defined(GP_OS_linux) || defined(GP_OS_android)
# define HAVE_CPU_FREQ_SUPPORT
#endif
#if defined(GP_OS_windows)
# include <windows.h>
struct CPUCounterInfo {
ULONGLONG data = 0;
DWORD base = 0;
uint32_t freq = 0;
DWORD nominalFrequency = 0;
};
#endif
#if defined(GP_OS_linux) || defined(GP_OS_android)
struct CPUCounterInfo {
int fd = 0;
};
#endif
class ProfilerCPUFreq {
public:
#if defined(HAVE_CPU_FREQ_SUPPORT)
explicit ProfilerCPUFreq();
~ProfilerCPUFreq();
# if defined(GP_OS_windows)
void Sample();
uint32_t GetCPUSpeedMHz(unsigned cpuId) {
MOZ_ASSERT(cpuId < mCPUCounters.length());
return mCPUCounters[cpuId].freq;
}
# else
void Sample() {}
uint32_t GetCPUSpeedMHz(unsigned cpuId);
# endif
#else
explicit ProfilerCPUFreq() {};
~ProfilerCPUFreq() {};
void Sample() {};
#endif
private:
#if defined(HAVE_CPU_FREQ_SUPPORT)
# if defined(GP_OS_windows)
LPWSTR mBlockIndex = nullptr;
DWORD mCounterNameIndex = 0;
// The size of the counter block is about 8kB for a machine with 20 cores,
// so 32kB should be plenty.
DWORD mBufferSize = 32768;
LPBYTE mBuffer = nullptr;
# endif
mozilla::Vector<CPUCounterInfo> mCPUCounters;
#endif
};
#endif /* ndef TOOLS_PROFILERCPUFREQ_H_ */
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