timer.h File Reference

high precision timer, useful to profile code More...

#include "config.h"
#include <stdlib.h>
#include <stdint.h>
#include <inttypes.h>
#include "log.h"

Go to the source code of this file.

Macros
#define	FF_TIMER_UNITS   "UNITS"
#define	TIMER_REPORT(id, tdiff)
#define	START_TIMER
#define	STOP_TIMER(id)   { }

Detailed Description

high precision timer, useful to profile code

Macro Definition Documentation

TIMER_REPORT

#define TIMER_REPORT	(		id,
			tdiff
	)

Value:

{                                                                     \
        static uint64_t tsum   = 0;                                       \
        static int tcount      = 0;                                       \
        static int tskip_count = 0;                                       \
        static int thistogram[32] = {0};                                  \
        thistogram[av_log2(tdiff)]++;                                     \
        if (tcount < 2                ||                                  \
            (tdiff) < 8 * tsum / tcount ||                                \
            (tdiff) < 2000) {                                             \
            tsum += (tdiff);                                              \
            tcount++;                                                     \
        } else                                                            \
            tskip_count++;                                                \
        if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \
            int i;                                                        \
            av_log(NULL, AV_LOG_ERROR,                                    \
                   "%7"PRIu64" " FF_TIMER_UNITS " in %s,%8d runs,%7d skips",          \
                   tsum * 10 / tcount, id, tcount, tskip_count);          \
            for (i = 0; i < 32; i++)                                      \
                av_log(NULL, AV_LOG_VERBOSE, " %2d", av_log2(2*thistogram[i]));\
            av_log(NULL, AV_LOG_ERROR, "\n");                             \
        }                                                                 \
    }