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avutil/timer: show histogram of cpu cycles each run took

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The new information is printed at verbose log level and can thus be switched on and off
through the log level

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-03-22 16:11:08 +01:00
parent 1f5d1eed78
commit 0fee509cf5
1 changed files with 7 additions and 1 deletions
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8
libavutil/timer.h
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@ -69,6 +69,8 @@
static uint64_t tsum = 0; \ static uint64_t tsum = 0; \
static int tcount = 0; \ static int tcount = 0; \
static int tskip_count = 0; \ static int tskip_count = 0; \
static int thistogram[32] = {0}; \
thistogram[av_log2(tend - tstart)]++; \
if (tcount < 2 || \ if (tcount < 2 || \
tend - tstart < 8 * tsum / tcount || \ tend - tstart < 8 * tsum / tcount || \
tend - tstart < 2000) { \ tend - tstart < 2000) { \
@ -77,9 +79,13 @@
} else \ } else \
tskip_count++; \ tskip_count++; \
if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \ if (((tcount + tskip_count) & (tcount + tskip_count - 1)) == 0) { \
int i; \
av_log(NULL, AV_LOG_ERROR, \ av_log(NULL, AV_LOG_ERROR, \
"%"PRIu64" " FF_TIMER_UNITS " in %s, %d runs, %d skips\n", \ "%"PRIu64" " FF_TIMER_UNITS " in %s, %d runs, %d skips", \
tsum * 10 / tcount, id, tcount, tskip_count); \ 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"); \
} \ } \
} }
#else #else