Message-ID: <770047.76192.qm@web65409.mail.ac4.yahoo.com>
Date: Thu, 7 Apr 2011 14:49:47 -0700 (PDT)
From: Andrew Klaassen <clawsoon@yahoo.com>
Subject: Re: Prioritizing readdirplus/getattr/lookup
To: 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
In-Reply-To: <514401.95922.qm@web65408.mail.ac4.yahoo.com>
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Sender: linux-nfs-owner@vger.kernel.org
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--- 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