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Subject: RE: Prioritizing readdirplus/getattr/lookup
Date: Thu, 7 Apr 2011 15:48:22 -0700
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From: "Murata, Dennis" <DENNIS.MURATA@saic.com>
To: "Andrew Klaassen" <clawsoon@yahoo.com>,
        "Chuck Lever" <chuck.lever@oracle.com>
Cc: "Benny Halevy" <bhalevy@panasas.com>, "Jim Rees" <rees@umich.edu>,
        "Garth Gibson" <garth@cs.cmu.edu>, <linux-nfs@vger.kernel.org>
Sender: linux-nfs-owner@vger.kernel.org
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Did you set each ksoftirqd to a specific cpu?
Wayne 

> -----Original Message-----
> From: linux-nfs-owner@vger.kernel.org 
> [mailto:linux-nfs-owner@vger.kernel.org] On Behalf Of Andrew Klaassen
> Sent: Thursday, April 07, 2011 4:50 PM
> To: Chuck Lever
> Cc: Benny Halevy; Jim Rees; Garth Gibson; linux-nfs@vger.kernel.org
> Subject: Re: Prioritizing readdirplus/getattr/lookup
> 
> --- On Thu, 4/7/11, Andrew Klaassen <clawsoon@yahoo.com> wrote:
> 
> > I do notice that ksoftirqd is eating up 100% of a core when I'm 
> > loading the server heavily.? I assume that's because I'm not using 
> > jumbo frames and the ethernet cards are spitting out interrupts as 
> > fast as they're able.
> 
> I just got myself edjumicated on smp_affinity, and now I'm 
> able to achieve 99% CPU usage by 8 nfsd processes on 8 cores 
> on a read-only, fully-cached workload, with ksoftirqd 
> processes only using 1% CPU per core.
> 
> Unfortunately, this doesn't help the "ls -l" speed.
> 
> Andrew
> 
> 
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