PerformanceTimer Struct Reference

#include <log.h>

Public Member Functions
	PerformanceTimer ()
void	reset ()
void	begin ()
void	end ()
float	sec () const

Static Public Member Functions
static int64_t	query ()

Data Fields
int64_t	total_ns

Detailed Description

Definition at line 142 of file log.h.

Constructor & Destructor Documentation

PerformanceTimer::PerformanceTimer ( )

inline

Definition at line 147 of file log.h.

                       {
        total_ns = 0;
    }

Member Function Documentation

void PerformanceTimer::begin ( )

inline

Definition at line 177 of file log.h.

                 {
        total_ns -= query();
    }

Here is the call graph for this function:

void PerformanceTimer::end ( )

inline

Definition at line 181 of file log.h.

               {
        total_ns += query();
    }

Here is the call graph for this function:

static int64_t PerformanceTimer::query ( )

inlinestatic

Definition at line 151 of file log.h.

                           {
#if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)
        struct timespec ts;
        clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts);
        return int64_t(ts.tv_sec)*1000000000 + ts.tv_nsec;
#elif defined(RUSAGE_SELF)
        struct rusage rusage;
        int64_t t;
        if (getrusage(RUSAGE_SELF, &rusage) == -1) {
            log_cmd_error("getrusage failed!\n");
            log_abort();
        }
        t = 1000000000ULL * (int64_t) rusage.ru_utime.tv_sec + (int64_t) rusage.ru_utime.tv_usec * 1000ULL;
        t += 1000000000ULL * (int64_t) rusage.ru_stime.tv_sec + (int64_t) rusage.ru_stime.tv_usec * 1000ULL;
        return t;
#elif _WIN32
        return 0;
#else
    #error Dont know how to measure per-process CPU time. Need alternative method (times()/clocks()/gettimeofday()?).
#endif
    }

Here is the call graph for this function:

Here is the caller graph for this function:

void PerformanceTimer::reset ( )

inline

Definition at line 173 of file log.h.

                 {
        total_ns = 0;
    }

float PerformanceTimer::sec ( ) const

inline

Definition at line 185 of file log.h.

                      {
        return total_ns * 1e-9f;
    }

Here is the caller graph for this function:

Field Documentation

int64_t PerformanceTimer::total_ns

Definition at line 145 of file log.h.

---

The documentation for this struct was generated from the following file:

• log.h