Takashi Iwai wrote: > > Hi Maarten, > > At Tue, 6 Nov 2001 17:12:01 +0100, > Maarten de Boer wrote: > > > > Hello, > > > > I am trying to get low latency with alsa. > > I have kernel 2.4.13 with the preemptive patch and the > > alsa-driver/utils/patches/rtc-2.4.9.dif patch applied. > > In the kernel configuration, I turned on RTC and > > Preemptive. > > > > I run the alsa-lib/test/latency.c test in poll mode, > > but the problem is the tick time, which is at 100 Hz: > > > > snd_pcm_hw_params_get_tick_time(params, NULL) = 10000 > > > > What am I doing wrong? > > The timer invoked by pcm is only system timer, so resolution is fixed > as HZ. IMO, it would be nice to make it available to use other timer > sources, but this will lead to major rewrite..
This would not imply a "major" rewrite: the API and the kernel code has been thought for that. You need simply to have different snd_pcm_tick_set functions (see pcm_lib.c). -- Abramo Bagnara mailto:[EMAIL PROTECTED] Opera Unica Phone: +39.546.656023 Via Emilia Interna, 140 48014 Castel Bolognese (RA) - Italy ALSA project http://www.alsa-project.org It sounds good! _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
