linux-kernel - Re: Bad network performance over 2Gbps

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Date:	Wed, 16 Apr 2008 01:36:36 +0300
From:	Anton Titov <a.titov@...t.bg>
To:	"Kok, Auke" <auke-jan.h.kok@...el.com>
Cc:	Willy Tarreau <w@....eu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-net@...r.kernel.org,
	Jesse Brandeburg <jesse.brandeburg@...el.com>
Subject: Re: Bad network performance over 2Gbps

On Tue, 2008-04-15 at 13:40 -0700, Kok, Auke wrote:
> Willy Tarreau wrote:
> 1) turn the in-kernel IRQBALANCE option off !
Actually it may be already removed. I remember it being under "Processor
type and features" and I currently cannot find it there for x86_64

> 2) use either the userspace `irqbalance` daemon or
> 3) set smp_affinity manually

I tried echoing 3 (assuming that CPU0 and CPU1 will share their cache,
as advised in other mails) into smp_affinity of all ethX interrupts and
no positive result was observed.

I will try disabling NAPI and limiting e1000 interrupts tomorrow.


> 
> Auke
> 
> > 
> > Regards,
> > Willy
> > 
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