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test: latency - add --policy option to allow using SCHED_FIFO

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Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2022-11-24 08:33:47 +01:00
parent 536c93928b
commit ea0850f3f3
1 changed files with 17 additions and 5 deletions
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22
test/latency.c
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@ -40,6 +40,7 @@
typedef struct timespec timestamp_t;
char *sched_policy = "rr";
char *pdevice = "hw:0,0";
char *cdevice = "hw:0,0";
snd_pcm_format_t format = SND_PCM_FORMAT_S16_LE;
@ -354,18 +355,24 @@ void gettimestamp(snd_pcm_t *handle, snd_timestamp_t *timestamp)
void setscheduler(void)
{
struct sched_param sched_param;
int policy = SCHED_RR;
const char *spolicy = "Round Robin";
if (strcasecmp(sched_policy, "fifo") == 0) {
policy = SCHED_FIFO;
spolicy = "FIFO";
}
if (sched_getparam(0, &sched_param) < 0) {
printf("Scheduler getparam failed...\n");
return;
}
sched_param.sched_priority = sched_get_priority_max(SCHED_RR);
if (!sched_setscheduler(0, SCHED_RR, &sched_param)) {
printf("Scheduler set to Round Robin with priority %i...\n", sched_param.sched_priority);
sched_param.sched_priority = sched_get_priority_max(policy);
if (!sched_setscheduler(0, policy, &sched_param)) {
printf("Scheduler set to %s with priority %i...\n", spolicy, sched_param.sched_priority);
fflush(stdout);
return;
}
printf("!!!Scheduler set to Round Robin with priority %i FAILED!!!\n", sched_param.sched_priority);
printf("!!!Scheduler set to %s with priority %i FAILED!!!\n", spolicy, sched_param.sched_priority);
}
long timediff(snd_timestamp_t t1, snd_timestamp_t t2)
@ -515,6 +522,7 @@ void help(void)
"-e,--effect apply an effect (bandpass filter sweep)\n"
"-x,--posdump dump buffer positions\n"
"-X,--realtime do a realtime check (buffering)\n"
"-O,--policy set scheduler policy (RR or FIFO)\n"
);
printf("Recognized sample formats are:");
for (k = 0; k < SND_PCM_FORMAT_LAST; ++k) {
@ -555,6 +563,7 @@ int main(int argc, char *argv[])
{"effect", 0, NULL, 'e'},
{"posdump", 0, NULL, 'x'},
{"realtime", 0, NULL, 'X'},
{"policy", 1, NULL, 'O'},
{NULL, 0, NULL, 0},
};
snd_pcm_t *phandle, *chandle;
@ -569,7 +578,7 @@ int main(int argc, char *argv[])
morehelp = 0;
while (1) {
int c;
if ((c = getopt_long(argc, argv, "hP:C:m:M:U:F:f:c:r:B:E:s:y:bpenxX", long_option, NULL)) < 0)
if ((c = getopt_long(argc, argv, "hP:C:m:M:U:F:f:c:r:B:E:s:y:O:bpenxX", long_option, NULL)) < 0)
break;
switch (c) {
case 'h':
@ -643,6 +652,9 @@ int main(int argc, char *argv[])
case 'X':
realtime_check = 1;
break;
case 'O':
sched_policy = optarg;
break;
}
}