@@ -3,7 +3,7 @@ SUBDIRS=. lsb
check_PROGRAMS=control pcm pcm_min latency seq \
playmidi1 timer rawmidi midiloop \
oldapi queue_timer namehint client_event_filter \
- chmap audio_time user-ctl-element-set
+ chmap audio_time user-ctl-element-set pcm-multi-thread
control_LDADD=../src/libasound.la
pcm_LDADD=../src/libasound.la
@@ -23,6 +23,7 @@ client_event_filter_LDADD=../src/libasound.la
code_CFLAGS=-Wall -pipe -g -O2
chmap_LDADD=../src/libasound.la
audio_time_LDADD=../src/libasound.la
+pcm_multi_thread_LDADD=../src/libasound.la
user_ctl_element_set_LDADD=../src/libasound.la
user_ctl_element_set_CFLAGS=-Wall -g
new file mode 100644
@@ -0,0 +1,263 @@
+/*
+ * simple multi-thread stress test for PCM
+ *
+ * The main thread simply feeds or reads the sample data with the
+ * random size continuously. Meanwhile, the worker threads call some
+ * update function depending on the given mode, and show the thread
+ * number of the read value.
+ *
+ * The function for the worker thread is specified via -m option.
+ * When the random mode ('r') is set, the update function is chosen
+ * randomly in the loop.
+ *
+ * When the -v option is passed, this tries to show some obtained value
+ * from the function. Without -v, as default, it shows the thread number
+ * (0-9). In addition, it puts the mode suffix ('a' for avail, 'd' for
+ * delay, etc) for the random mode, as well as the suffix '!' indicating
+ * the error from the called function.
+ */
+
+#include <stdio.h>
+#include <pthread.h>
+#include <getopt.h>
+#include "../include/asoundlib.h"
+
+#define MAX_THREADS 10
+
+enum {
+ MODE_AVAIL_UPDATE,
+ MODE_STATUS,
+ MODE_HWSYNC,
+ MODE_TIMESTAMP,
+ MODE_DELAY,
+ MODE_RANDOM
+};
+
+static char mode_suffix[] = {
+ 'a', 's', 'h', 't', 'd', 'r'
+};
+
+static const char *devname = "default";
+static int stream = SND_PCM_STREAM_PLAYBACK;
+static int num_threads = 1;
+static int periodsize = 16 * 1024;
+static int bufsize = 16 * 1024 * 4;
+static int channels = 2;
+static int rate = 48000;
+static snd_pcm_format_t format = SND_PCM_FORMAT_S16_LE;
+
+static int running_mode = MODE_AVAIL_UPDATE;
+static int show_value = 0;
+static int quiet = 0;
+
+static pthread_t peeper_threads[MAX_THREADS];
+static int running = 1;
+static snd_pcm_t *pcm;
+
+static void *peeper(void *data)
+{
+ int thread_no = (long)data;
+ snd_pcm_sframes_t val;
+ snd_pcm_status_t *stat;
+ snd_htimestamp_t tstamp;
+ int mode = running_mode, err;
+
+ snd_pcm_status_alloca(&stat);
+
+ while (running) {
+ if (running_mode == MODE_RANDOM)
+ mode = rand() % MODE_RANDOM;
+ switch (mode) {
+ case MODE_AVAIL_UPDATE:
+ val = snd_pcm_avail_update(pcm);
+ err = 0;
+ break;
+ case MODE_STATUS:
+ err = snd_pcm_status(pcm, stat);
+ val = snd_pcm_status_get_avail(stat);
+ break;
+ case MODE_HWSYNC:
+ err = snd_pcm_hwsync(pcm);
+ break;
+ case MODE_TIMESTAMP:
+ err = snd_pcm_htimestamp(pcm, (snd_pcm_uframes_t *)&val,
+ &tstamp);
+ break;
+ default:
+ err = snd_pcm_delay(pcm, &val);
+ break;
+ }
+
+ if (quiet)
+ continue;
+ if (running_mode == MODE_RANDOM) {
+ fprintf(stderr, "%d%c%s", thread_no, mode_suffix[mode],
+ err ? "!" : "");
+ } else {
+ if (show_value && mode != MODE_HWSYNC)
+ fprintf(stderr, "\r%d ", (int)val);
+ else
+ fprintf(stderr, "%d%s", thread_no,
+ err ? "!" : "");
+ }
+ }
+ return NULL;
+}
+
+static void usage(void)
+{
+ fprintf(stderr, "usage: multi-thread [-options]\n");
+ fprintf(stderr, " -D str Set device name\n");
+ fprintf(stderr, " -r val Set sample rate\n");
+ fprintf(stderr, " -p val Set period size (in frame)\n");
+ fprintf(stderr, " -b val Set buffer size (in frame)\n");
+ fprintf(stderr, " -c val Set number of channels\n");
+ fprintf(stderr, " -f str Set PCM format\n");
+ fprintf(stderr, " -s str Set stream direction (playback or capture)\n");
+ fprintf(stderr, " -t val Set number of threads\n");
+ fprintf(stderr, " -m str Running mode (avail, status, hwsync, timestamp, delay, random)\n");
+ fprintf(stderr, " -v Show value\n");
+ fprintf(stderr, " -q Quiet mode\n");
+}
+
+static int parse_options(int argc, char **argv)
+{
+ int c, i;
+
+ while ((c = getopt(argc, argv, "D:r:f:p:b:s:t:m:vq")) >= 0) {
+ switch (c) {
+ case 'D':
+ devname = optarg;
+ break;
+ case 'r':
+ rate = atoi(optarg);
+ break;
+ case 'p':
+ periodsize = atoi(optarg);
+ break;
+ case 'b':
+ bufsize = atoi(optarg);
+ break;
+ case 'c':
+ channels = atoi(optarg);
+ break;
+ case 'f':
+ format = snd_pcm_format_value(optarg);
+ break;
+ case 's':
+ if (*optarg == 'p' || *optarg == 'P')
+ stream = SND_PCM_STREAM_PLAYBACK;
+ else if (*optarg == 'c' || *optarg == 'C')
+ stream = SND_PCM_STREAM_CAPTURE;
+ else {
+ fprintf(stderr, "invalid stream direction\n");
+ return 1;
+ }
+ break;
+ case 't':
+ num_threads = atoi(optarg);
+ if (num_threads < 1 || num_threads > MAX_THREADS) {
+ fprintf(stderr, "invalid number of threads\n");
+ return 1;
+ }
+ break;
+ case 'm':
+ for (i = 0; i <= MODE_RANDOM; i++)
+ if (mode_suffix[i] == *optarg)
+ break;
+ if (i > MODE_RANDOM) {
+ fprintf(stderr, "invalid mode type\n");
+ return 1;
+ }
+ running_mode = i;
+ break;
+ case 'v':
+ show_value = 1;
+ break;
+ case 'q':
+ quiet = 1;
+ break;
+ default:
+ usage();
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int setup_params(void)
+{
+ snd_pcm_hw_params_t *hw;
+
+ /* FIXME: more finer error checks */
+ snd_pcm_hw_params_alloca(&hw);
+ snd_pcm_hw_params_any(pcm, hw);
+ snd_pcm_hw_params_set_access(pcm, hw, SND_PCM_ACCESS_RW_INTERLEAVED);
+ snd_pcm_hw_params_set_format(pcm, hw, format);
+ snd_pcm_hw_params_set_channels(pcm, hw, channels);
+ snd_pcm_hw_params_set_rate(pcm, hw, rate, 0);
+ snd_pcm_hw_params_set_period_size(pcm, hw, periodsize, 0);
+ snd_pcm_hw_params_set_buffer_size(pcm, hw, bufsize);
+ if (snd_pcm_hw_params(pcm, hw) < 0) {
+ fprintf(stderr, "snd_pcm_hw_params error\n");
+ return 1;
+ }
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ char *buf;
+ int i, err;
+
+ if (parse_options(argc, argv))
+ return 1;
+
+ err = snd_pcm_open(&pcm, devname, stream, 0);
+ if (err < 0) {
+ fprintf(stderr, "cannot open pcm %s\n", devname);
+ return 1;
+ }
+
+ if (setup_params())
+ return 1;
+
+ buf = calloc(1, snd_pcm_format_size(format, bufsize) * channels);
+ if (!buf) {
+ fprintf(stderr, "cannot alloc buffer\n");
+ return 1;
+ }
+
+ for (i = 0; i < num_threads; i++) {
+ if (pthread_create(&peeper_threads[i], NULL, peeper, (void *)(long)i)) {
+ fprintf(stderr, "pthread_create error\n");
+ return 1;
+ }
+ }
+
+ if (stream == SND_PCM_STREAM_CAPTURE)
+ snd_pcm_start(pcm);
+ for (;;) {
+ int size = rand() % (bufsize / 2);
+ if (stream == SND_PCM_STREAM_PLAYBACK)
+ err = snd_pcm_writei(pcm, buf, size);
+ else
+ err = snd_pcm_readi(pcm, buf, size);
+ if (err < 0) {
+ fprintf(stderr, "read/write error %d\n", err);
+ err = snd_pcm_recover(pcm, err, 0);
+ if (err < 0)
+ break;
+ if (stream == SND_PCM_STREAM_CAPTURE)
+ snd_pcm_start(pcm);
+ }
+ }
+
+ running = 0;
+ for (i = 0; i < num_threads; i++)
+ pthread_cancel(peeper_threads[i]);
+ for (i = 0; i < num_threads; i++)
+ pthread_join(peeper_threads[i], NULL);
+
+ return 1;
+}
A simple multi-thread stress test for PCM is added to test subdirectory. It can perform various PCM update function in the worker threads while reading/writing the data in the main thread. It can help catching the unexpected error or blockage. For example, running the capture test with a softvol plugin will lead to the assert due to the races. Signed-off-by: Takashi Iwai <tiwai@suse.de> --- test/Makefile.am | 3 +- test/pcm-multi-thread.c | 263 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 265 insertions(+), 1 deletion(-) create mode 100644 test/pcm-multi-thread.c