Message-ID: <417542FF.8000800@pobox.com>
Date: Tue, 19 Oct 2004 12:38:23 -0400
From: Jeff Garzik <jgarzik@pobox.com>
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To: alistair@devzero.co.uk
CC: LKML <linux-kernel@vger.kernel.org>
Subject: Re: 2.6.9: performance issues on Via Epia
References: <200410191604.22747.alistair@devzero.co.uk>
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Alistair John Strachan wrote:
> Hi,
> 
> I recently upgraded from 2.6.8.1 to 2.6.9 (the release, not -final) on my Via 
> Epia 5000 router. Now when I transfer files from the machine's HD vsftpd can 
> only achieve 3MB/s.
> 
> I believe this is some performance problem specifically related to XFS, or 
> something specific to the local VM, because if I transfer from an NFS mounted 
> directory on the same machine, vsftpd easily achieves the 10MB/s I'm used to.
> 
> Top shows something typical to this during transfers from the machine's local 
> HD;
> 
> Cpu(s):  0.7% us,  9.2% sy,  0.0% ni,  0.3% id, 84.5% wa,  5.3% hi,  0.0% si
> 
> Which seems like an awful lot of wait time. Anybody got any suggestions of 
> where to start reverting patches? The amount of difference between 2.6.8.1 
> and 2.6.9 is quite daunting.
> 
> By the way, copying a file locally on the system from the same partition to 
> another directory is far more efficient.
> 
> [root] 16:02 [~] time cp /var/cache/swapfile here
> `/var/cache/swapfile' -> `here'

check ethernet too...

	Jeff


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