/*** 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 #endif #include #include #include #include #ifdef HAVE_PTHREAD #include #ifdef HAVE_PTHREAD_SETAFFINITY_NP #if defined(__FreeBSD__) #include #include #include #endif #endif #endif #include #include #include #include #include #include #include #include static int msec_lower, msec_upper; static void work(void *p) PA_GCC_NORETURN; static void work(void *p) { pa_log_notice("CPU%i: Created thread.", PA_PTR_TO_UINT(p)); pa_make_realtime(12); #ifdef HAVE_PTHREAD_SETAFFINITY_NP { #ifdef __FreeBSD__ cpuset_t mask; #else cpu_set_t mask; #endif 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 timeval now, end; uint64_t usec; pa_log_notice("CPU%i: Sleeping for 1s", PA_PTR_TO_UINT(p)); pa_msleep(1000); usec = (uint64_t) ((((double) rand())*(double)(msec_upper-msec_lower)*PA_USEC_PER_MSEC)/RAND_MAX) + (uint64_t) ((uint64_t) msec_lower*PA_USEC_PER_MSEC); pa_log_notice("CPU%i: Freezing for %ims", PA_PTR_TO_UINT(p), (int) (usec/PA_USEC_PER_MSEC)); pa_rtclock_get(&end); pa_timeval_add(&end, usec); do { pa_rtclock_get(&now); } while (pa_timeval_cmp(&now, &end) < 0); } } int main(int argc, char*argv[]) { unsigned n; pa_log_set_level(PA_LOG_INFO); 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++) { pa_assert_se(pa_thread_new("rtstutter", work, PA_UINT_TO_PTR(n))); } work(PA_INT_TO_PTR(0)); return 0; }