On Tuesday 07 September 2004 06:45, Eric Dantan Rzewnicki wrote: > Eric Dantan Rzewnicki wrote: > > Eric Dantan Rzewnicki wrote: > >> Eric Dantan Rzewnicki wrote: > >>> For anyone who, like me, missed most of the past month or two of > >>> discussions, this is where Ingo's 2.6.x patches live: > >>> http://people.redhat.com/mingo/voluntary-preempt/ > >>> Thanks to whoever posted the kernel-traffic link. I almost feel > >>> caught up to reality now. 8-] > >> > >> Uhhhmmm ... anyone know if I want this: > >> http://people.redhat.com/mingo/voluntary-preempt/diff-bk-040828-2.6.8.1. > >>bz2 or this: > >> http://people.redhat.com/mingo/voluntary-preempt/older/voluntary-preempt > >>-2.6.8.1-P9 > > > > ^ > > Gaaahh. | That's the one, I think. Compiling new kernel .deb at the > > moment. > > > >> ??? > >> (maybe I should just go to sleep and deal with this tomorrow.) > > Ok ... I've got this installed now. recompiled the realtime lsm and > recompiled alsa-drivers. > > http://people.redhat.com/mingo/voluntary-preempt/ANNOUNCE-voluntary-preempt > > speaks of setting /proc/sys/kernel/voluntary_preemption to 1 to turn it > on ... trying this I still have the audio glitches and ecasound reports > xruns. I noticed when the system came up this was set to 3 by default. I > tried setting it back to 3, but still xruns. The audio glitches seemed > to sound a little better ... but, I'm getting a little punchy and the > work week is nearly upon me. I'll have to test more next weekend. > > have more options been added to the /proc/ interface for voluntary > preempt since the announcement above? > I think the following is still correct - This is what i use with a slightly earlier patch. To get the lowest latency you have to (echo 0 > /proc/irq/?/?/threaded) where ? is the soundcard irq and the rtc irq. eg echo 0 > /proc/irq/10/ICE1712/threaded & echo 0 > /proc/irq/8/rtc/threaded Dave > I've seen some mentions of configuring alsa with debugging info. Is > there a brief explanation somewhere of how to best help with weeding out > the 2.6.x latency problems? > > > Thanks, > Eric Rz.
