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Double slack time for busy-wait

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This commit is contained in:
Gustaf Alhäll 2025-01-06 09:49:04 +01:00
parent 1da55066d4
commit fb80091ac3
2 changed files with 17 additions and 8 deletions
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23
src/dedicated/i_system.c
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@ -376,13 +376,22 @@ void I_SleepDuration(precise_t duration)
{
#if defined(__linux__) || defined(__FreeBSD__)
UINT64 precision = I_GetPrecisePrecision();
struct timespec ts = {
.tv_sec = duration / precision,
.tv_nsec = duration * 1000000000 / precision % 1000000000,
};
int status;
do status = clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, &ts);
while (status == EINTR);
precise_t dest = I_GetPreciseTime() + duration;
precise_t slack = (precision / 5000); // 0.2 ms slack
if (duration > slack)
{
duration -= slack;
struct timespec ts = {
.tv_sec = duration / precision,
.tv_nsec = duration * 1000000000 / precision % 1000000000,
};
int status;
do status = clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, &ts);
while (status == EINTR);
}
// busy-wait the rest
while (((INT64)dest - (INT64)I_GetPreciseTime()) > 0);
#else
UINT64 precision = I_GetPrecisePrecision();
INT32 sleepvalue = cv_sleep.value;

2
src/sdl/i_system.c
View file

@ -2310,7 +2310,7 @@ void I_SleepDuration(precise_t duration)
#if defined(__linux__) || defined(__FreeBSD__) || defined(__HAIKU__)
UINT64 precision = I_GetPrecisePrecision();
precise_t dest = I_GetPreciseTime() + duration;
precise_t slack = (precision / 10000); // 0.1 ms slack
precise_t slack = (precision / 5000); // 0.2 ms slack
if (duration > slack)
{
duration -= slack;