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make rtprio and nice level actually configurable

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2014 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2007-11-01 02:58:26 +00:00
parent 641d1fa964
commit 7bfd1b2f01
11 changed files with 94 additions and 54 deletions
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87
src/pulsecore/core-util.c
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@ -512,8 +512,10 @@ char *pa_strlcpy(char *b, const char *s, size_t l) {
return b;
}
/* Make the current thread a realtime thread*/
void pa_make_realtime(void) {
/* Make the current thread a realtime thread, and acquire the highest
* rtprio we can get that is less or equal the specified parameter. If
* the thread is already realtime, don't do anything. */
int pa_make_realtime(int rtprio) {
#ifdef _POSIX_PRIORITY_SCHEDULING
struct sched_param sp;
@ -524,50 +526,87 @@ void pa_make_realtime(void) {
if ((r = pthread_getschedparam(pthread_self(), &policy, &sp)) != 0) {
pa_log("pthread_getschedgetparam(): %s", pa_cstrerror(r));
return;
return -1;
}
sp.sched_priority = 1;
if (policy == SCHED_FIFO && sp.sched_priority >= rtprio) {
pa_log_info("Thread already being scheduled with SCHED_FIFO with priority %i.", sp.sched_priority);
return 0;
}
sp.sched_priority = rtprio;
if ((r = pthread_setschedparam(pthread_self(), SCHED_FIFO, &sp)) != 0) {
while (sp.sched_priority > 1) {
sp.sched_priority --;
if ((r = pthread_setschedparam(pthread_self(), SCHED_FIFO, &sp)) == 0) {
pa_log_info("Successfully enabled SCHED_FIFO scheduling for thread, with priority %i, which is lower than the requested %i.", sp.sched_priority, rtprio);
return 0;
}
}
pa_log_warn("pthread_setschedparam(): %s", pa_cstrerror(r));
return;
return -1;
}
pa_log_info("Successfully enabled SCHED_FIFO scheduling for thread.");
pa_log_info("Successfully enabled SCHED_FIFO scheduling for thread, with priority %i.", sp.sched_priority);
return 0;
#else
return -1;
#endif
}
#define NICE_LEVEL (-11)
/* Raise the priority of the current process as much as possible and
sensible: set the nice level to -11.*/
void pa_raise_priority(void) {
/* Raise the priority of the current process as much as possible that
* is <= the specified nice level..*/
int pa_raise_priority(int nice_level) {
#ifdef HAVE_SYS_RESOURCE_H
if (setpriority(PRIO_PROCESS, 0, NICE_LEVEL) < 0)
if (setpriority(PRIO_PROCESS, 0, nice_level) < 0) {
int n;
for (n = nice_level+1; n < 0; n++) {
if (setpriority(PRIO_PROCESS, 0, n) == 0) {
pa_log_info("Successfully acquired nice level %i, which is lower than the requested %i.", n, nice_level);
return 0;
}
}
pa_log_warn("setpriority(): %s", pa_cstrerror(errno));
else
pa_log_info("Successfully gained nice level %i.", NICE_LEVEL);
return -1;
}
pa_log_info("Successfully gained nice level %i.", nice_level);
#endif
#ifdef OS_IS_WIN32
if (!SetPriorityClass(GetCurrentProcess(), HIGH_PRIORITY_CLASS))
pa_log_warn("SetPriorityClass() failed: 0x%08X", GetLastError());
else
pa_log_info("Successfully gained high priority class.");
if (nice_level < 0) {
if (!SetPriorityClass(GetCurrentProcess(), HIGH_PRIORITY_CLASS)) {
pa_log_warn("SetPriorityClass() failed: 0x%08X", GetLastError());
return .-1;
} else
pa_log_info("Successfully gained high priority class.");
}
#endif
return 0;
}
/* Reset the priority to normal, inverting the changes made by
* pa_raise_priority() */
* pa_raise_priority() and pa_make_realtime()*/
void pa_reset_priority(void) {
#ifdef OS_IS_WIN32
SetPriorityClass(GetCurrentProcess(), NORMAL_PRIORITY_CLASS);
#ifdef HAVE_SYS_RESOURCE_H
struct sched_param sp;
setpriority(PRIO_PROCESS, 0, 0);
memset(&sp, 0, sizeof(sp));
pa_assert_se(pthread_setschedparam(pthread_self(), SCHED_OTHER, &sp) == 0);
#endif
#ifdef HAVE_SYS_RESOURCE_H
setpriority(PRIO_PROCESS, 0, 0);
#ifdef OS_IS_WIN32
SetPriorityClass(GetCurrentProcess(), NORMAL_PRIORITY_CLASS);
#endif
}