At Thu, 03 Sep 2009 13:50:26 +0200, Clemens Ladisch wrote: > > (please don't top-post) > > Giovanni Maruzzelli wrote: > > In centos is 1000HZ, in the kernels I compiled is 100HZ > > I would have expected these to be the other way around, since higher > timer frequency should result in more accurate simulated sound card > interrupts. Actually, it's maybe because of a bad code in snd-dummy driver. It issues the timer update at each tick. Thus with more HZ, it can loose more ticks and be less accurate. I worked on it ago, and changed the code to update in a better way. But forgot to apply to the upstream. Now I digged down, and resurrected it with the highres timer support as a quick hack. The patches are found in sound-unstable GIT tree topic/dummy-hrtimer branch: git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-unstable-2.6.git topic/dummy-hrtimer and in alsa-driver-unstable snapshot as well: ftp://ftp.kernel.org/pub/linux/kernel/people/tiwai/snapshot/alsa-driver-unstable-snapshot.tar.gz Giovanni, give it a try. If it works, I'm going to add it to 2.6.32. thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
