69 lines
1.7 KiB
C++
Executable file
69 lines
1.7 KiB
C++
Executable file
#ifndef BENCHMARK_THREAD_TIMER_H
|
|
#define BENCHMARK_THREAD_TIMER_H
|
|
|
|
#include "check.h"
|
|
#include "timers.h"
|
|
|
|
namespace benchmark {
|
|
namespace internal {
|
|
|
|
class ThreadTimer {
|
|
public:
|
|
ThreadTimer() = default;
|
|
|
|
// Called by each thread
|
|
void StartTimer() {
|
|
running_ = true;
|
|
start_real_time_ = ChronoClockNow();
|
|
start_cpu_time_ = ThreadCPUUsage();
|
|
}
|
|
|
|
// Called by each thread
|
|
void StopTimer() {
|
|
CHECK(running_);
|
|
running_ = false;
|
|
real_time_used_ += ChronoClockNow() - start_real_time_;
|
|
// Floating point error can result in the subtraction producing a negative
|
|
// time. Guard against that.
|
|
cpu_time_used_ += std::max<double>(ThreadCPUUsage() - start_cpu_time_, 0);
|
|
}
|
|
|
|
// Called by each thread
|
|
void SetIterationTime(double seconds) { manual_time_used_ += seconds; }
|
|
|
|
bool running() const { return running_; }
|
|
|
|
// REQUIRES: timer is not running
|
|
double real_time_used() {
|
|
CHECK(!running_);
|
|
return real_time_used_;
|
|
}
|
|
|
|
// REQUIRES: timer is not running
|
|
double cpu_time_used() {
|
|
CHECK(!running_);
|
|
return cpu_time_used_;
|
|
}
|
|
|
|
// REQUIRES: timer is not running
|
|
double manual_time_used() {
|
|
CHECK(!running_);
|
|
return manual_time_used_;
|
|
}
|
|
|
|
private:
|
|
bool running_ = false; // Is the timer running
|
|
double start_real_time_ = 0; // If running_
|
|
double start_cpu_time_ = 0; // If running_
|
|
|
|
// Accumulated time so far (does not contain current slice if running_)
|
|
double real_time_used_ = 0;
|
|
double cpu_time_used_ = 0;
|
|
// Manually set iteration time. User sets this with SetIterationTime(seconds).
|
|
double manual_time_used_ = 0;
|
|
};
|
|
|
|
} // namespace internal
|
|
} // namespace benchmark
|
|
|
|
#endif // BENCHMARK_THREAD_TIMER_H
|