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/***
This file is part of PulseAudio.
Copyright 2008 Lennart Poettering
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <sched.h>
#include <inttypes.h>
#include <string.h>
#include <pthread.h>
#include <pulse/timeval.h>
#include <pulse/gccmacro.h>
#include <pulsecore/log.h>
#include <pulsecore/macro.h>
#include <pulsecore/core-util.h>
static int msec_lower, msec_upper;
static void* work(void *p) PA_GCC_NORETURN;
static void* work(void *p) {
#ifdef HAVE_PTHREAD_SETAFFINITY_NP
cpu_set_t mask;
#endif
struct sched_param param;
pa_log_notice("CPU%i: Created thread.", PA_PTR_TO_UINT(p));
memset(¶m, 0, sizeof(param));
param.sched_priority = 12;
pa_assert_se(pthread_setschedparam(pthread_self(), SCHED_FIFO, ¶m) == 0);
#ifdef HAVE_PTHREAD_SETAFFINITY_NP
CPU_ZERO(&mask);
CPU_SET((size_t) PA_PTR_TO_UINT(p), &mask);
pa_assert_se(pthread_setaffinity_np(pthread_self(), sizeof(mask), &mask) == 0);
#endif
for (;;) {
struct timespec now, end;
uint64_t nsec;
pa_log_notice("CPU%i: Sleeping for 1s", PA_PTR_TO_UINT(p));
sleep(1);
pa_assert_se(clock_gettime(CLOCK_REALTIME, &end) == 0);
nsec =
(uint64_t) ((((double) rand())*(double)(msec_upper-msec_lower)*PA_NSEC_PER_MSEC)/RAND_MAX) +
(uint64_t) ((uint64_t) msec_lower*PA_NSEC_PER_MSEC);
pa_log_notice("CPU%i: Freezing for %ims", PA_PTR_TO_UINT(p), (int) (nsec/PA_NSEC_PER_MSEC));
end.tv_sec += (time_t) (nsec / PA_NSEC_PER_SEC);
end.tv_nsec += (long int) (nsec % PA_NSEC_PER_SEC);
while ((pa_usec_t) end.tv_nsec > PA_NSEC_PER_SEC) {
end.tv_sec++;
end.tv_nsec -= (long int) PA_NSEC_PER_SEC;
}
do {
pa_assert_se(clock_gettime(CLOCK_REALTIME, &now) == 0);
} while (now.tv_sec < end.tv_sec ||
(now.tv_sec == end.tv_sec && now.tv_nsec < end.tv_nsec));
}
}
int main(int argc, char*argv[]) {
unsigned n;
srand((unsigned) time(NULL));
if (argc >= 3) {
msec_lower = atoi(argv[1]);
msec_upper = atoi(argv[2]);
} else if (argc >= 2) {
msec_lower = 0;
msec_upper = atoi(argv[1]);
} else {
msec_lower = 0;
msec_upper = 1000;
}
pa_assert(msec_upper > 0);
pa_assert(msec_upper >= msec_lower);
pa_log_notice("Creating random latencies in the range of %ims to %ims.", msec_lower, msec_upper);
for (n = 1; n < pa_ncpus(); n++) {
pthread_t t;
pa_assert_se(pthread_create(&t, NULL, work, PA_UINT_TO_PTR(n)) == 0);
}
work(PA_INT_TO_PTR(0));
return 0;
}
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