uint64_t Timer::get_elapsed_cpu_time_microseconds() const
{
CPUTime e;
GetCPUTimeMicroSeconds(&e);
return (e.user_time - m_start_time.user_time) +
(e.sys_time - m_start_time.sys_time);
}
void Timer::restart(const char* msg)
{
if (msg) {
TRACE_ERR(msg << std::endl);
}
m_wall = GetTimeOfDayMicroSeconds();
GetCPUTimeMicroSeconds(&m_start_time);
}
void Timer::start(const char* msg)
{
// Print an optional message, something like "Starting timer t";
if (msg) TRACE_ERR( msg << std::endl);
if (m_is_running) return;
m_is_running = true;
m_wall = GetTimeOfDayMicroSeconds();
GetCPUTimeMicroSeconds(&m_start_time);
}
std::string Timer::ToString() const {
std::string res;
const double wall = get_elapsed_wall_time();
CPUTime e;
GetCPUTimeMicroSeconds(&e);
const double utime = (e.user_time - m_start_time.user_time) * 1e-6;
const double stime = (e.sys_time - m_start_time.sys_time) * 1e-6;
std::stringstream ss;
ss << "wall " << wall << " sec. user " << utime << " sec. sys " << stime
<< " sec. total " << utime + stime << " sec.";
res.append(ss.str());
return res;
}
