4 This file is part of PulseAudio.
6 Copyright 2008 Lennart Poettering
8 PulseAudio is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as
10 published by the Free Software Foundation; either version 2 of the
11 License, or (at your option) any later version.
13 PulseAudio is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public
19 License along with PulseAudio; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
36 #include <pulse/timeval.h>
37 #include <pulse/gccmacro.h>
39 #include <pulsecore/log.h>
40 #include <pulsecore/macro.h>
42 static int msec_lower, msec_upper;
44 static void* work(void *p) PA_GCC_NORETURN;
46 static void* work(void *p) {
48 struct sched_param param;
50 pa_log_notice("CPU%i: Created thread.", PA_PTR_TO_INT(p));
52 memset(¶m, 0, sizeof(param));
53 param.sched_priority = 12;
54 pa_assert_se(pthread_setschedparam(pthread_self(), SCHED_FIFO, ¶m) == 0);
57 CPU_SET(PA_PTR_TO_INT(p), &mask);
58 pa_assert_se(pthread_setaffinity_np(pthread_self(), sizeof(mask), &mask) == 0);
61 struct timespec now, end;
64 pa_log_notice("CPU%i: Sleeping for 1s", PA_PTR_TO_INT(p));
67 pa_assert_se(clock_gettime(CLOCK_REALTIME, &end) == 0);
70 (uint64_t) ((((double) rand())*(msec_upper-msec_lower)*PA_NSEC_PER_MSEC)/RAND_MAX) +
71 (uint64_t) (msec_lower*PA_NSEC_PER_MSEC);
73 pa_log_notice("CPU%i: Freezing for %ims", PA_PTR_TO_INT(p), (int) (nsec/PA_NSEC_PER_MSEC));
75 end.tv_sec += nsec / PA_NSEC_PER_SEC;
76 end.tv_nsec += nsec % PA_NSEC_PER_SEC;
78 while (end.tv_nsec > PA_NSEC_PER_SEC) {
80 end.tv_nsec -= PA_NSEC_PER_SEC;
84 pa_assert_se(clock_gettime(CLOCK_REALTIME, &now) == 0);
85 } while (now.tv_sec < end.tv_sec ||
86 (now.tv_sec == end.tv_sec && now.tv_nsec < end.tv_nsec));
90 int main(int argc, char*argv[]) {
96 msec_lower = atoi(argv[1]);
97 msec_upper = atoi(argv[2]);
98 } else if (argc >= 2) {
100 msec_upper = atoi(argv[1]);
106 pa_assert(msec_upper > 0);
107 pa_assert(msec_upper >= msec_lower);
109 pa_log_notice("Creating random latencies in the range of %ims to %ims.", msec_lower, msec_upper);
111 for (n = 1; n < sysconf(_SC_NPROCESSORS_CONF); n++) {
113 pa_assert_se(pthread_create(&t, NULL, work, PA_INT_TO_PTR(n)) == 0);
116 work(PA_INT_TO_PTR(0));