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Perf: Add stat for sched of ST.

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This commit is contained in:
winlin 2021-02-10 20:00:33 +08:00
parent 7b913b1115
commit a46debb4bb
3 changed files with 118 additions and 18 deletions
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32
trunk/3rdparty/st-srs/event.c vendored
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@ -47,6 +47,14 @@
#include <sys/epoll.h>
#endif
// Global stat.
#ifdef DEBUG
unsigned long long _st_stat_epoll = 0;
unsigned long long _st_stat_epoll_zero = 0;
unsigned long long _st_stat_epoll_shake = 0;
unsigned long long _st_stat_epoll_spin = 0;
#endif
#if defined(USE_POLL) && !defined(MD_HAVE_POLL)
/* Force poll usage if explicitly asked for it */
#define MD_HAVE_POLL
@ -1205,6 +1213,10 @@ ST_HIDDEN void _st_epoll_dispatch(void)
int events, op;
short revents;
#ifdef DEBUG
++_st_stat_epoll;
#endif
if (_ST_SLEEPQ == NULL) {
timeout = -1;
} else {
@ -1212,8 +1224,18 @@ ST_HIDDEN void _st_epoll_dispatch(void)
timeout = (int) (min_timeout / 1000);
// At least wait 1ms when <1ms, to avoid epoll_wait spin loop.
if (min_timeout > 0 && timeout == 0) {
timeout = 1;
if (timeout == 0) {
#ifdef DEBUG
++_st_stat_epoll_zero;
#endif
if (min_timeout > 0) {
#ifdef DEBUG
++_st_stat_epoll_shake;
#endif
timeout = 1;
}
}
}
@ -1240,6 +1262,12 @@ ST_HIDDEN void _st_epoll_dispatch(void)
/* Check for I/O operations */
nfd = epoll_wait(_st_epoll_data->epfd, _st_epoll_data->evtlist, _st_epoll_data->evtlist_size, timeout);
#ifdef DEBUG
if (nfd <= 0) {
++_st_stat_epoll_spin;
}
#endif
if (nfd > 0) {
for (i = 0; i < nfd; i++) {
osfd = _st_epoll_data->evtlist[i].data.fd;