On Thu, 2005-05-12 at 22:58 +0200, Tim Blechmann wrote: > hi all.. > > i'm trying to sleep for some very low time slices ... about 100 to 1000 > us ... > but i can't get below about 1 ms ... are there any workarounds to sleep > for very small time slices? >
You can't sleep less than 1ms because that is the tick rate of the timer interrupt. For now the only universal "solution" is to busy-wait. If your soundcard's timer is supported by the ALSA timer API (currently only emu10k1 and ymfpci), you can get very good resolution: 1 tick at 48000Hz is 21 usecs. Otherwise the ALSA timer resolution will only be as good as the system timer. > i tested nanosleep(), usleep() and select(0, 0, 0, 0, &timout) ... The real solution, which is likely to end up in the mainline kernel, is George Anzinger's high res timers patch: http://sourceforge.net/projects/high-res-timers/ High res timers have been a hot topic on LKML lately. Lee