Re: [linux-audio-dev] Re: [Jackit-devel] 2.4.20-rc1 + lowlat +preempt + alsa + jack = dead computer

On Saturday 07 December 2002 03.58, Fernando Pablo Lopez-Lezcano wrote: I would be interested in trying your version of the patches. Please mail! :-) BTW, I applied the 2.4.19 LL patch to 2.4.20, and got a few rejects in the file system area, which I have not investigated further. (Seems to be a lot of changes around there...) Performance is "ok" under X and proc stress, but I get countless latencies in the whole range up to some 6-8 ms as soon as I start stressing the disk. (This is *with* DMA enabled, of course.) Haven't tried preempt yet. As to freezing, I've only managed to do that once - and IIRC, that was when trying to instantiate a synth in MusE while Ardour was running in the background. No useful info about what actually happened, and I haven't tested that combination any further. Are you certain your freeze is actually happening in kernel space? Tried using watchdog with "ping-pong" between highest and lowest priority SCHED_FIFO threads? (BTW, we should have a watchdog anyway, probably integrated with givertcap or something.) //David Olofson - Programmer, Composer, Open Source Advocate .- The Return of Audiality! --------------------------------. | Free/Open Source Audio Engine for use in Games or Studio. | | RT and off-line synth. Scripting. Sample accurate timing. | `---------------------------> http://olofson.net/audiality -' .- M A I A -------------------------------------------------. | The Multimedia Application Integration Architecture | `----------------------------> http://www.linuxdj.com/maia -' --- http://olofson.net --- http://www.reologica.se ---