Subject: Re: [linux-audio-user] latency issues
From: Jan Depner (eviltwin69_AT_cableone.net)
Date: Tue Oct 07 2003 - 00:31:21 EEST
All of those goodies on IRQ 11 is probably what's killing you. Try
moving your sound card to different slots until it gets an IRQ to
itself. You really want IRQ 9 or 10 if possible otherwise it's going to
be lower priority than your stuff on IRQ 11. I didn't really put any
"tricks" per se in the ALSA_JACK_ARDOUR doc just suggestions from Mark
Knecht and others and my own experience with it. Playing with the
latency setting helps.
Jan
On Mon, 2003-10-06 at 09:00, dwillis_AT_stx.rr.com wrote:
> On Mon, 6 Oct 2003, Robert Jonsson wrote:
>
> > First, I'd like to know if you by "latency testing" mean that you ran
> > Benno's latency test program?
>
> yes, as well as actual pd results. it seems i was using a messed up
> custom latencytest, and when i found the proper one (i have many on my
> system and it's been 2 years since using them) i got the best results i've
> ever seen (1.1ms max for all tests at 0% cpu, 1.2ms at 80%).
>
> so, it looks like the problem must be with pd. i'm going to try some
> older versions now.
>
> > For some info do check (seems to be down at the moment)
> > http://myweb.cableone.net/eviltwin69/ALSA_JACK_ARDOUR.html
>
> thanks. it's up now.
>
> > Did you check what IRQ your card was assigned? There's lots of interesting
> > info in the above document.
>
> 11, and nothing on 8 or 9 (though my eth, usb [unused], agp card, and
> onboard sound [unused] are all on 11 as well).
>
> > As a sidenote, my system doesn't do much better than the 16ms scenario
> > either... I don't know if it's hardware or software problems... Trying the
> > "tricks" in the document above did help though...
>
> what "tricks?"
>
> thanks,
> dave
>
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