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tests: Minor alsa-time-test improvments

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Tries to get RT privs and prints elapsed time and a periodic header to
make grokking the output easier.
This commit is contained in:
Arun Raghavan 2012-11-08 14:54:51 +05:30
parent c6806efb09
commit 93a4a82bd3
1 changed files with 21 additions and 3 deletions
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24
src/tests/alsa-time-test.c
View file

@ -5,6 +5,8 @@
#include <assert.h>
#include <inttypes.h>
#include <time.h>
#include <unistd.h>
#include <pthread.h>
#include <alsa/asoundlib.h>
@ -16,7 +18,7 @@ static uint64_t timespec_us(const struct timespec *ts) {
int main(int argc, char *argv[]) {
const char *dev;
int r, cap;
int r, cap, count = 0;
snd_pcm_hw_params_t *hwparams;
snd_pcm_sw_params_t *swparams;
snd_pcm_status_t *status;
@ -26,11 +28,20 @@ int main(int argc, char *argv[]) {
snd_pcm_uframes_t boundary, buffer_size = 44100/10; /* 100s */
int dir = 1;
struct timespec start, last_timestamp = { 0, 0 };
uint64_t start_us;
uint64_t start_us, last_us = 0;
snd_pcm_sframes_t last_avail = 0, last_delay = 0;
struct pollfd *pollfds;
int n_pollfd;
int64_t sample_count = 0;
struct sched_param sp;
r = -1;
#ifdef _POSIX_PRIORITY_SCHEDULING
sp.sched_priority = 5;
r = pthread_setschedparam(pthread_self(), SCHED_RR, &sp);
#endif
if (r)
printf("Could not get RT prio. :(\n");
snd_pcm_hw_params_alloca(&hwparams);
snd_pcm_sw_params_alloca(&swparams);
@ -128,6 +139,8 @@ int main(int argc, char *argv[]) {
r = snd_pcm_poll_descriptors(pcm, pollfds, n_pollfd);
assert(r == n_pollfd);
printf("Starting. Buffer size is %u frames\n", (unsigned int) buffer_size);
if (cap) {
r = snd_pcm_start(pcm);
assert(r == 0);
@ -203,7 +216,11 @@ int main(int argc, char *argv[]) {
else
pos = (unsigned long long) ((sample_count - handled + delay) * 1000000LU / 44100);
printf("%llu\t%llu\t%llu\t%llu\t%li\t%li\t%i\t%i\t%i\n",
if (count++ % 50 == 0)
printf("Elapsed\tCPU\tALSA\tPos\tSamples\tavail\tdelay\trevents\thandled\tstate\n");
printf("%llu\t%llu\t%llu\t%llu\t%llu\t%li\t%li\t%i\t%i\t%i\n",
(unsigned long long) (now_us - last_us),
(unsigned long long) (now_us - start_us),
(unsigned long long) (timestamp_us ? timestamp_us - start_us : 0),
pos,
@ -222,6 +239,7 @@ int main(int argc, char *argv[]) {
last_avail = avail;
last_delay = delay;
last_timestamp = timestamp;
last_us = now_us;
}
return 0;