Subject: Re: [linux-audio-dev] kernel 2.6.6 just out
From: Frank Barknecht (fbar_AT_footils.org)
Date: Wed May 12 2004 - 17:17:11 EEST
Hallo,
Richard Bown hat gesagt: // Richard Bown wrote:
> On Wednesday 12 May 2004 14:22, Alfons Adriaensen wrote:
>
> > I've been using a standard SuSE 9.0 (2.4) for about six months
> > now, and it performs very well for audio work.
>
> Are you using the stock 2.4.21 kernel? Any idea how to enable
> capabilities on it? I've been playing around with SuSE 9.0 over the
> last couple of days and with an SBLive am only get reasonably
> xrun-free performance with jackd at 2048, 2 periods. I'd like to
> enable caps and use jackstart to see if that makes a difference but
> after a couple of days of prodding about only found one oblique
> reference to modifying CAP_INIT_EFF_SET and CAP_INIT_INH_SET in
> include/linux/capability.h. Even then the kernel I ended up
> building wouldn't boot - my usual standard of kernel build I hasten
> to add..
This sounds like a problem building kernels which can have many
reasons. Still, you can check if you're able to get better results by
running plain jackd as root with --realtime set. If this won't make
things better, then the capabilities stuff will help you nothing, as
those just make it easier to run applications with higher scheduling
than having to run them as root. But cap won't help getting lower
latencies at all.
If running as root doesn't help, then you need to either patch your
kernel the old fashioned way with low latency etc. Or try stock 2.6.6.
For this you can also build a realtime module that won't need the
cap-patch anymore.
Ciao
-- Frank Barknecht _ ______footils.org__
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