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perf_counter: added perf_reset() and perf_reset_all() calls

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useful for watching counters after system reaches stable flight
This commit is contained in:
Andrew Tridgell 2013-01-24 10:00:23 +11:00
parent cc74874d7e
commit f4da4bb8ca
2 changed files with 58 additions and 0 deletions
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45
apps/systemlib/perf_counter.c
View File

@ -218,6 +218,40 @@ perf_end(perf_counter_t handle)
}
}
void
perf_reset(perf_counter_t handle)
{
if (handle == NULL)
return;
switch (handle->type) {
case PC_COUNT:
((struct perf_ctr_count *)handle)->event_count = 0;
break;
case PC_ELAPSED: {
struct perf_ctr_elapsed *pce = (struct perf_ctr_elapsed *)handle;
pce->event_count = 0;
pce->time_start = 0;
pce->time_total = 0;
pce->time_least = 0;
pce->time_most = 0;
break;
}
case PC_INTERVAL: {
struct perf_ctr_interval *pci = (struct perf_ctr_interval *)handle;
pci->event_count = 0;
pci->time_event = 0;
pci->time_first = 0;
pci->time_last = 0;
pci->time_least = 0;
pci->time_most = 0;
break;
}
}
}
void
perf_print_counter(perf_counter_t handle)
{
@ -270,3 +304,14 @@ perf_print_all(void)
handle = (perf_counter_t)sq_next(&handle->link);
}
}
void
perf_reset_all(void)
{
perf_counter_t handle = (perf_counter_t)sq_peek(&perf_counters);
while (handle != NULL) {
perf_reset(handle);
handle = (perf_counter_t)sq_next(&handle->link);
}
}

13
apps/systemlib/perf_counter.h
View File

@ -97,6 +97,14 @@ __EXPORT extern void perf_begin(perf_counter_t handle);
*/
__EXPORT extern void perf_end(perf_counter_t handle);
/**
* Reset a performance event.
*
* This call resets performance counter to initial state
*
* @param handle The handle returned from perf_alloc.
*/
__EXPORT extern void perf_reset(perf_counter_t handle);
/**
* Print one performance counter.
@ -110,6 +118,11 @@ __EXPORT extern void perf_print_counter(perf_counter_t handle);
*/
__EXPORT extern void perf_print_all(void);
/**
* Reset all of the performance counters.
*/
__EXPORT extern void perf_reset_all(void);
__END_DECLS
#endif