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avoid division by zero

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tumbili
2015-09-03 09:46:54 +02:00
parent 50a5fb94ad
commit 4d35291649
1 changed files with 1 additions and 2 deletions
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3
src/modules/systemlib/perf_counter.c
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@@ -396,13 +396,12 @@ perf_print_counter_fd(int fd, perf_counter_t handle)
case PC_ELAPSED: {
struct perf_ctr_elapsed *pce = (struct perf_ctr_elapsed *)handle;
float rms = sqrtf(pce->M2 / (pce->event_count-1));
dprintf(fd, "%s: %llu events, %llu overruns, %lluus elapsed, %lluus avg, min %lluus max %lluus %5.3fus rms\n",
handle->name,
(unsigned long long)pce->event_count,
(unsigned long long)pce->event_overruns,
(unsigned long long)pce->time_total,
(unsigned long long)pce->time_total / pce->event_count,
pce->event_count == 0 ? 0 : (unsigned long long)pce->time_total / pce->event_count,
(unsigned long long)pce->time_least,
(unsigned long long)pce->time_most,
(double)(1e6f * rms));