linux-kernel - Re: How how latent should non-preemptive scheduling be?

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Message-Id: <1222030615.10469.10.camel@bazbox>
Date:	Sun, 21 Sep 2008 21:56:55 +0100
From:	Matt Keenan <tank.en.mate@...il.com>
To:	Sitsofe Wheeler <sitsofe@...oo.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>
Subject: Re: How how latent should non-preemptive scheduling be?

On Wed, 2008-09-17 at 22:18 +0100, Sitsofe Wheeler wrote:
> Hi,
> 
> I have an EeePC 900 (Intel Celeron 900Mhz) and it seems to be skipping 
> while playing sound through various desktop apps with a 2.6.27rc6 
> kernel. It is running off an SD card which really shows up slow writes 
> but the sound is seemingly skipping even when ext3 is not being used. 

[snip snip]

If you use ALSA you could write a custom .asoundrc file and increase
ALSA's default buffer size, this gives the hardware a longer buffer to
play which may work around the problem. This used to do the trick for me
with the old scheduler with slow machines. Not a fix but if nothing else
works...

Matt

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