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03df08872d
git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/glitch-free@2276 fefdeb5f-60dc-0310-8127-8f9354f1896f
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/* $Id$ */
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/***
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This file is part of PulseAudio.
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Copyright 2008 Lennart Poettering
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdlib.h>
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#include <unistd.h>
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#include <time.h>
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#include <sched.h>
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#include <inttypes.h>
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#include <string.h>
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#include <pthread.h>
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#include <pulse/timeval.h>
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#include <pulse/gccmacro.h>
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#include <pulsecore/log.h>
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#include <pulsecore/macro.h>
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static int msec_lower, msec_upper;
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static void* work(void *p) PA_GCC_NORETURN;
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static void* work(void *p) {
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cpu_set_t mask;
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struct sched_param param;
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pa_log_notice("CPU%i: Created thread.", PA_PTR_TO_INT(p));
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memset(¶m, 0, sizeof(param));
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param.sched_priority = 12;
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pa_assert_se(pthread_setschedparam(pthread_self(), SCHED_FIFO, ¶m) == 0);
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CPU_ZERO(&mask);
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CPU_SET(PA_PTR_TO_INT(p), &mask);
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pa_assert_se(pthread_setaffinity_np(pthread_self(), sizeof(mask), &mask) == 0);
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for (;;) {
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struct timespec now, end;
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uint64_t nsec;
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pa_log_notice("CPU%i: Sleeping for 1s", PA_PTR_TO_INT(p));
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sleep(1);
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pa_assert_se(clock_gettime(CLOCK_REALTIME, &end) == 0);
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nsec =
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(uint64_t) ((((double) rand())*(msec_upper-msec_lower)*PA_NSEC_PER_MSEC)/RAND_MAX) +
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(uint64_t) (msec_lower*PA_NSEC_PER_MSEC);
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pa_log_notice("CPU%i: Freezing for %ims", PA_PTR_TO_INT(p), (int) (nsec/PA_NSEC_PER_MSEC));
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end.tv_sec += nsec / PA_NSEC_PER_SEC;
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end.tv_nsec += nsec % PA_NSEC_PER_SEC;
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while (end.tv_nsec > PA_NSEC_PER_SEC) {
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end.tv_sec++;
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end.tv_nsec -= PA_NSEC_PER_SEC;
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}
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do {
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pa_assert_se(clock_gettime(CLOCK_REALTIME, &now) == 0);
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} while (now.tv_sec < end.tv_sec ||
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(now.tv_sec == end.tv_sec && now.tv_nsec < end.tv_nsec));
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}
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}
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int main(int argc, char*argv[]) {
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int n;
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srand(time(NULL));
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if (argc >= 3) {
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msec_lower = atoi(argv[1]);
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msec_upper = atoi(argv[2]);
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} else if (argc >= 2) {
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msec_lower = 0;
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msec_upper = atoi(argv[1]);
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} else {
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msec_lower = 0;
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msec_upper = 1000;
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}
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pa_assert(msec_upper > 0);
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pa_assert(msec_upper >= msec_lower);
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pa_log_notice("Creating random latencies in the range of %ims to %ims.", msec_lower, msec_upper);
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for (n = 1; n < sysconf(_SC_NPROCESSORS_CONF); n++) {
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pthread_t t;
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pa_assert_se(pthread_create(&t, NULL, work, PA_INT_TO_PTR(n)) == 0);
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}
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work(PA_INT_TO_PTR(0));
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return 0;
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}
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