linux-kernel - Re: v2.6.19-rt6, yum/rpm

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Message-ID: <20061207205819.GA21953@elte.hu>
Date:	Thu, 7 Dec 2006 21:58:19 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Fernando Lopez-Lezcano <nando@...ma.Stanford.EDU>
Cc:	linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org,
	Mike Galbraith <efault@....de>,
	Clark Williams <williams@...hat.com>,
	Sergei Shtylyov <sshtylyov@...mvista.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Giandomenico De Tullio <ghisha@...il.it>
Subject: Re: v2.6.19-rt6, yum/rpm


* Fernando Lopez-Lezcano <nando@...ma.Stanford.EDU> wrote:

> Much better performance in terms of xruns with Jackd. Hardly any at 
> all as it should be. I'm starting to test -rt8 right now.
> 
> Now, I still don't have an smp machine to test so the improvement 
> could be because I'm just running 64 bit up instead of smp. Or it 
> could have been the hardware on that other machine that had some 
> problem (either because it was starting to fail or because the kernel 
> drivers for that hardware were somehow triggering the xruns).

i think it's the UP vs. SMP difference. We are chasing some SMP 
latencies right now that trigger on boxes that have deeper C sleep 
states. idle=poll seems to work around those problems.

	Ingo
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