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Re: [RESEND] tuning linux for high network performance?

To: bert hubert <ahu@xxxxxxx>
Subject: Re: [RESEND] tuning linux for high network performance?
From: Nivedita Singhvi <niv@xxxxxxxxxx>
Date: Wed, 23 Oct 2002 07:59:59 -0700
Cc: Roy Sigurd Karlsbakk <roy@xxxxxxxxxxxxx>, netdev@xxxxxxxxxxx, Kernel mailing list <linux-kernel@xxxxxxxxxxxxxxx>
References: <200210231218.18733.roy@xxxxxxxxxxxxx> <200210231306.18422.roy@xxxxxxxxxxxxx> <20021023130101.GA646@xxxxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
bert hubert wrote:

> > ...adding the whole profile output - sorted by the first column this time...
> >
> > 905182 total                                      0.4741
> > 121426 csum_partial_copy_generic                474.3203
> >  93633 default_idle                             1800.6346
> >  74665 do_wp_page                               111.1086
> Perhaps the 'copy' also entails grabbing the page from disk, leading to
> inflated csum_partial_copy_generic stats?

I think this is strictly a copy from user space->kernel and vice versa.
This shouldnt include the disk access etc. 


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