[linux-audio-user] Advice needed re: latency tuning/optimization, esp. video

Jan Depner eviltwin69 at cableone.net
Tue Feb 17 17:41:29 EST 2004


	I was just looking at one of the other posts.  If your problem is the
video card you might try tuning the PCI latency.  Check out my page -
http://myweb.cableone.net/eviltwin69/Arcana.html.  There are a couple of
links that cover latency really well.


On Tue, 2004-02-17 at 15:51, Chris Metzler wrote:
> On 16 Feb 2004 14:54:13 -0600
> Jan Depner <eviltwin69 at cableone.net> wrote:
> >
> > Agreed.  Your system should rock like crazy except for one leetle
> > problem.  IRQ 9 is higher priority than IRQ 10 so every time you get
> > disk activity you're probably dropping audio.
> Yeah, that's what I would have *expected* -- so I was really surprised
> when the latency tests didn't work out that way.  Playing PCM audio
> while writing, then copying, a 1.5 GB file (half again as large as my
> RAM, so can't RAM-cache it), with my disk over 90% full, still produced
> what I *think* (if I'm understanding all this correctly) are pretty
> good numbers (100% within 1ms of the fragment latency).  But I do plan
> on tinkering with this, especially if the performance is troublesome
> when I start doing real stuff.
> But while the disk results looked good, the graphics results weren't
> very . . .
> -c
> -- 
> Chris Metzler			cmetzler at speakeasy.snip-me.net
> 		(remove "snip-me." to email)
> "As a child I understood how to give; I have forgotten this grace since I
> have become civilized." - Chief Luther Standing Bear

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