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Make fixes and improvements

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- clock_nanosleep() is now much faster on OpenBSD and NetBSD
- Thread joining is now much faster on NetBSD
- FreeBSD timestamps are now more accurate
- Thread spawning now goes faster on XNU
- Clean up the clone() code
This commit is contained in:
Justine Tunney 2022-11-08 10:09:47 -08:00
parent aee50b1327
commit b407327972
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GPG key ID: BE714B4575D6E328
47 changed files with 645 additions and 306 deletions
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10
libc/calls/now.c
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@ -45,10 +45,10 @@ static long double GetTimeSample(void) {
uint64_t tick1, tick2;
long double time1, time2;
sched_yield();
time1 = dtime(CLOCK_REALTIME_FAST);
time1 = dtime(CLOCK_REALTIME_PRECISE);
tick1 = rdtsc();
nanosleep(&(struct timespec){0, 1000000}, NULL);
time2 = dtime(CLOCK_REALTIME_FAST);
time2 = dtime(CLOCK_REALTIME_PRECISE);
tick2 = rdtsc();
return (time2 - time1) * 1e9 / MAX(1, tick2 - tick1);
}
@ -74,13 +74,13 @@ static long double MeasureNanosPerCycle(void) {
void RefreshTime(void) {
struct Now now;
now.cpn = MeasureNanosPerCycle();
now.r0 = dtime(CLOCK_REALTIME_FAST);
now.r0 = dtime(CLOCK_REALTIME_PRECISE);
now.k0 = rdtsc();
memcpy(&g_now, &now, sizeof(now));
}
static long double nowl_sys(void) {
return dtime(CLOCK_REALTIME_FAST);
return dtime(CLOCK_REALTIME_PRECISE);
}
static long double nowl_art(void) {
@ -92,7 +92,7 @@ static long double nowl_vdso(void) {
long double secs;
struct timespec tv;
_unassert(__gettime);
__gettime(CLOCK_REALTIME_FAST, &tv);
__gettime(CLOCK_REALTIME_PRECISE, &tv);
secs = tv.tv_nsec;
secs *= 1 / 1e9L;
secs += tv.tv_sec;