linux-kernel - Re: [rc8] Regression: key repeats and skips in music during compilation

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Message-ID: <20080407123234.GA8521@elte.hu>
Date:	Mon, 7 Apr 2008 14:32:34 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Frans Pop <elendil@...net.nl>
Cc:	linux-kernel@...r.kernel.org,
	Dhaval Giani <dhaval@...ux.vnet.ibm.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [rc8] Regression: key repeats and skips in music during
	compilation


* Frans Pop <elendil@...net.nl> wrote:

> > I thought we had most of the issues ironed out.
> 
> Note that I can also reproduce the issue with a kernel that does *not* 
> have CONFIG_GROUP_SCHED set. I still get the music skips (maybe less 
> frequently, but that's hard to measure), and I've have also seen key 
> repeats once.
> 
> Anything I can do to provide additional info on this?

yes, if you have an audio skipping bug, there's a mini-howto at:

 http://people.redhat.com/mingo/sched-devel.git/howto-debug-latencies.txt

and a more laborous way would be to trace such skipping:

 http://people.redhat.com/mingo/sched-devel.git/howto-trace-latencies.txt

	Ingo
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