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Merge pull request #1083 from yshui/freebsd-sched-fix

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core: don't check RLIMIT_RTPRIO
This commit is contained in:
Maxim Solovyov
2023-06-26 16:06:10 +03:00
committed by GitHub
parent f6625198ba f8cdc81635
commit 0bb45d50d6
1 changed files with 18 additions and 12 deletions
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30
src/picom.c
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@@ -16,6 +16,7 @@
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <sched.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
@@ -2576,30 +2577,35 @@ err:
free(ps);
return NULL;
}
/// Switch to real-time scheduling policy (SCHED_RR) if possible
///
/// Make picom realtime to reduce latency, and make rendering times more predictable to
/// help pacing.
///
/// This requires the user to set up permissions for the real-time scheduling. e.g. by
/// setting `ulimit -r`, or giving us the CAP_SYS_NICE capability.
void set_rr_scheduling(void) {
struct rlimit rlim;
if (getrlimit(RLIMIT_RTPRIO, &rlim) != 0) {
log_warn("Failed to get RLIMIT_RTPRIO, not setting real-time priority");
return;
}
int old_policy;
int priority = sched_get_priority_min(SCHED_RR);
int ret;
struct sched_param param;
ret = pthread_getschedparam(pthread_self(), &old_policy, &param);
ret = sched_getparam(0, &param);
if (ret != 0) {
log_debug("Failed to get old scheduling priority");
return;
}
param.sched_priority = (int)rlim.rlim_cur;
ret = pthread_setschedparam(pthread_self(), SCHED_RR, &param);
param.sched_priority = priority;
ret = sched_setscheduler(0, SCHED_RR, &param);
if (ret != 0) {
log_info("Failed to set scheduling priority to %lu", rlim.rlim_cur);
log_info("Failed to set real-time scheduling priority to %d. Consider "
"giving picom the CAP_SYS_NICE capability",
priority);
return;
}
log_info("Set scheduling priority to %lu", rlim.rlim_cur);
log_info("Set real-time scheduling priority to %d", priority);
}
/**