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hrt: Add interface functions for latency counters

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Add interface functions for fetching latency buckets and counters and use
those in perf_counter.cpp. This cleans up the usage of perf counters, when variables defined in hrt_drv are not referenced directly from perf.

This also enables implementing kernel-userspace interface for those for
nuttx protected/kernel build.

Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
This commit is contained in:
Jukka Laitinen
2021-11-09 21:24:25 -05:00
committed by Daniel Agar
parent da51177382
commit 9299a5c3f6
3 changed files with 58 additions and 8 deletions
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src/lib/perf/perf_counter.cpp
+7 -7
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@@ -610,15 +610,17 @@ perf_print_all(int fd)
void
perf_print_latency(int fd)
{
latency_info_t latency;
dprintf(fd, "bucket [us] : events\n");
for (int i = 0; i < latency_bucket_count; i++) {
dprintf(fd, " %4i : %li\n", latency_buckets[i], (long int)latency_counters[i]);
for (int i = 0; i < get_latency_bucket_count(); i++) {
latency = get_latency(i, i);
dprintf(fd, " %4i : %li\n", latency.bucket, (long int)latency.counter);
}
// print the overflow bucket value
dprintf(fd, " >%4" PRIu16 " : %" PRIu32 "\n", latency_buckets[latency_bucket_count - 1],
latency_counters[latency_bucket_count]);
latency = get_latency(get_latency_bucket_count() - 1, get_latency_bucket_count());
dprintf(fd, " >%4" PRIu16 " : %" PRIu32 "\n", latency.bucket, latency.counter);
}
void
@@ -634,7 +636,5 @@ perf_reset_all(void)
pthread_mutex_unlock(&perf_counters_mutex);
for (int i = 0; i <= latency_bucket_count; i++) {
latency_counters[i] = 0;
}
reset_latency_counters();
}