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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; typedef struct timespec timestamp_t;
char *sched_policy = "rr";
char *pdevice = "hw:0,0"; char *pdevice = "hw:0,0";
char *cdevice = "hw:0,0"; char *cdevice = "hw:0,0";
snd_pcm_format_t format = SND_PCM_FORMAT_S16_LE; 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) void setscheduler(void)
{ {
struct sched_param sched_param; 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) { if (sched_getparam(0, &sched_param) < 0) {
printf("Scheduler getparam failed...\n"); printf("Scheduler getparam failed...\n");
return; return;
} }
sched_param.sched_priority = sched_get_priority_max(SCHED_RR); sched_param.sched_priority = sched_get_priority_max(policy);
if (!sched_setscheduler(0, SCHED_RR, &sched_param)) { if (!sched_setscheduler(0, policy, &sched_param)) {
printf("Scheduler set to Round Robin with priority %i...\n", sched_param.sched_priority); printf("Scheduler set to %s with priority %i...\n", spolicy, sched_param.sched_priority);
fflush(stdout); fflush(stdout);
return; 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) 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" "-e,--effect apply an effect (bandpass filter sweep)\n"
"-x,--posdump dump buffer positions\n" "-x,--posdump dump buffer positions\n"
"-X,--realtime do a realtime check (buffering)\n" "-X,--realtime do a realtime check (buffering)\n"
"-O,--policy set scheduler policy (RR or FIFO)\n"
); );
printf("Recognized sample formats are:"); printf("Recognized sample formats are:");
for (k = 0; k < SND_PCM_FORMAT_LAST; ++k) { for (k = 0; k < SND_PCM_FORMAT_LAST; ++k) {
@ -555,6 +563,7 @@ int main(int argc, char *argv[])
{"effect", 0, NULL, 'e'}, {"effect", 0, NULL, 'e'},
{"posdump", 0, NULL, 'x'}, {"posdump", 0, NULL, 'x'},
{"realtime", 0, NULL, 'X'}, {"realtime", 0, NULL, 'X'},
{"policy", 1, NULL, 'O'},
{NULL, 0, NULL, 0}, {NULL, 0, NULL, 0},
}; };
snd_pcm_t *phandle, *chandle; snd_pcm_t *phandle, *chandle;
@ -569,7 +578,7 @@ int main(int argc, char *argv[])
morehelp = 0; morehelp = 0;
while (1) { while (1) {
int c; 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; break;
switch (c) { switch (c) {
case 'h': case 'h':
@ -643,6 +652,9 @@ int main(int argc, char *argv[])
case 'X': case 'X':
realtime_check = 1; realtime_check = 1;
break; break;
case 'O':
sched_policy = optarg;
break;
} }
} }