1/***
2  This file is part of PulseAudio.
3
4  Copyright 2008 Lennart Poettering
5
6  PulseAudio is free software; you can redistribute it and/or modify
7  it under the terms of the GNU Lesser General Public License as
8  published by the Free Software Foundation; either version 2.1 of the
9  License, or (at your option) any later version.
10
11  PulseAudio is distributed in the hope that it will be useful, but
12  WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  General Public License for more details.
15
16  You should have received a copy of the GNU Lesser General Public
17  License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
18***/
19
20#ifdef HAVE_CONFIG_H
21#include <config.h>
22#endif
23
24#include <stdlib.h>
25#include <unistd.h>
26#include <time.h>
27#include <inttypes.h>
28
29#ifdef HAVE_PTHREAD
30#include <pthread.h>
31#ifdef HAVE_PTHREAD_SETAFFINITY_NP
32#ifdef __FreeBSD__
33#include <pthread_np.h>
34#include <sys/param.h>
35#include <sys/cpuset.h>
36#endif
37#endif
38#endif
39
40#include <pulse/util.h>
41#include <pulse/timeval.h>
42#include <pulse/gccmacro.h>
43
44#include <pulsecore/log.h>
45#include <pulsecore/macro.h>
46#include <pulsecore/thread.h>
47#include <pulsecore/core-util.h>
48#include <pulsecore/core-rtclock.h>
49
50static int msec_lower, msec_upper;
51
52static void work(void *p) PA_GCC_NORETURN;
53
54static void work(void *p) {
55
56    pa_log_notice("CPU%i: Created thread.", PA_PTR_TO_UINT(p));
57
58    pa_thread_make_realtime(12);
59
60#ifdef HAVE_PTHREAD_SETAFFINITY_NP
61{
62#ifdef __FreeBSD__
63    cpuset_t mask;
64#else
65    cpu_set_t mask;
66#endif
67
68    CPU_ZERO(&mask);
69    CPU_SET((size_t) PA_PTR_TO_UINT(p), &mask);
70    pa_assert_se(pthread_setaffinity_np(pthread_self(), sizeof(mask), &mask) == 0);
71}
72#endif
73
74    for (;;) {
75        struct timeval now, end;
76        uint64_t usec;
77
78        pa_log_notice("CPU%i: Sleeping for 1s", PA_PTR_TO_UINT(p));
79        pa_msleep(1000);
80
81        usec =
82            (uint64_t) ((((double) rand())*(double)(msec_upper-msec_lower)*PA_USEC_PER_MSEC)/RAND_MAX) +
83            (uint64_t) ((uint64_t) msec_lower*PA_USEC_PER_MSEC);
84
85        pa_log_notice("CPU%i: Freezing for %ims", PA_PTR_TO_UINT(p), (int) (usec/PA_USEC_PER_MSEC));
86
87        pa_rtclock_get(&end);
88        pa_timeval_add(&end, usec);
89
90        do {
91            pa_rtclock_get(&now);
92        } while (pa_timeval_cmp(&now, &end) < 0);
93    }
94}
95
96int main(int argc, char*argv[]) {
97    unsigned n;
98
99    pa_log_set_level(PA_LOG_INFO);
100
101    srand((unsigned) time(NULL));
102
103    if (argc >= 3) {
104        msec_lower = atoi(argv[1]);
105        msec_upper = atoi(argv[2]);
106    } else if (argc >= 2) {
107        msec_lower = 0;
108        msec_upper = atoi(argv[1]);
109    } else {
110        msec_lower = 0;
111        msec_upper = 1000;
112    }
113
114    pa_assert(msec_upper > 0);
115    pa_assert(msec_upper >= msec_lower);
116
117    pa_log_notice("Creating random latencies in the range of %ims to %ims.", msec_lower, msec_upper);
118
119    for (n = 1; n < pa_ncpus(); n++) {
120        pa_assert_se(pa_thread_new("rtstutter", work, PA_UINT_TO_PTR(n)));
121    }
122
123    work(PA_INT_TO_PTR(0));
124
125    return 0;
126}
127