netdev - Re: Network latency regressions from 2.6.22 to 2.6.29

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Message-Id: <20090416.160002.09845606.davem@davemloft.net>
Date:	Thu, 16 Apr 2009 16:00:02 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	cl@...ux.com
Cc:	dada1@...mosbay.com, netdev@...r.kernel.org
Subject: Re: Network latency regressions from 2.6.22 to 2.6.29

From: Christoph Lameter <cl@...ux.com>
Date: Thu, 16 Apr 2009 16:01:16 -0400 (EDT)

> On Thu, 16 Apr 2009, Eric Dumazet wrote:
> 
>> Also you might check /proc/interrupts, because recent linux versions are
>> distributing interrupts on all cpus instead of one on previous version
> 
> Argh. I just checked it and the systems used for the test had no irq
> pinning. We are rerunning the series.

Good catch Eric :-)

We really need to find a good way to fix that IRQ affinity issue.
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