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| author | Jaroslav Kysela <perex@perex.cz> | 2022-11-23 17:56:20 +0100 |
|---|---|---|
| committer | Jaroslav Kysela <perex@perex.cz> | 2022-11-23 17:56:20 +0100 |
| commit | f0f054517c05ff4ef7a1615851a686a3a202b9ff (patch) | |
| tree | 7c5469fba7cf3449cc8daf524aef06f9ac5fae7e | |
| parent | 9649b64c6f72984c53f469dad8dd4221d307e06d (diff) | |
| download | alsa-lib-f0f054517c05ff4ef7a1615851a686a3a202b9ff.tar.gz | |
test: latency - add -y option (I/O usleep)
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
| -rw-r--r-- | test/latency.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/test/latency.c b/test/latency.c index 3aff37c1..161d1f68 100644 --- a/test/latency.c +++ b/test/latency.c @@ -52,6 +52,7 @@ int latency_max = 2048; /* in frames / 2 */ int loop_sec = 30; /* seconds */ int block = 0; /* block mode */ int use_poll = 0; +int usleep_val = 0; int resample = 1; int sys_latency = 0; /* data I/O: use system timings instead driver wakeups */ int pos_dump = 0; /* dump positions */ @@ -509,6 +510,8 @@ void help(void) "-s,--seconds duration of test in seconds\n" "-b,--block block mode\n" "-p,--poll use poll (wait for event - reduces CPU usage)\n" +"-y,--usleep sleep for the specified amount of microseconds between\n" +" stream updates (default 0 - off)\n" "-e,--effect apply an effect (bandpass filter sweep)\n" "-x,--posdump dump buffer positions\n" "-X,--realtime do a realtime check (buffering)\n" @@ -548,6 +551,7 @@ int main(int argc, char *argv[]) {"seconds", 1, NULL, 's'}, {"block", 0, NULL, 'b'}, {"poll", 0, NULL, 'p'}, + {"usleep", 1, NULL, 'y'}, {"effect", 0, NULL, 'e'}, {"posdump", 0, NULL, 'x'}, {"realtime", 0, NULL, 'X'}, @@ -565,7 +569,7 @@ 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:bpenxX", long_option, NULL)) < 0) + if ((c = getopt_long(argc, argv, "hP:C:m:M:U:F:f:c:r:B:E:s:y:bpenxX", long_option, NULL)) < 0) break; switch (c) { case 'h': @@ -624,6 +628,9 @@ int main(int argc, char *argv[]) case 'p': use_poll = 1; break; + case 'y': + usleep_val = atoi(optarg); + break; case 'e': effect = 1; break; @@ -671,6 +678,8 @@ int main(int argc, char *argv[]) loop_limit, latency_min * 2, latency_max * 2); if (sys_latency > 0) printf(", I/O updates %ims", sys_latency); + else if (!block) + printf(", I/O usleep %ius", usleep_val); printf("\n"); if ((err = snd_pcm_open(&phandle, pdevice, SND_PCM_STREAM_PLAYBACK, block ? 0 : SND_PCM_NONBLOCK)) < 0) { @@ -755,6 +764,8 @@ int main(int argc, char *argv[]) } else if (use_poll) { /* use poll to wait for next event */ snd_pcm_wait(chandle, 1000); + } else if (usleep_val > 0) { + usleep(usleep_val); } if (pos_dump || realtime_check) { if (sys_latency <= 0) |