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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 10:12:23 -0700
Cc: Roy Sigurd Karlsbakk <roy@xxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, netdev@xxxxxxxxxxx, Kernel mailing list <linux-kernel@xxxxxxxxxxxxxxx>
References: <200210231218.18733.roy@karlsbakk.net> <20021023130101.GA646@outpost.ds9a.nl> <1035379308.5950.3.camel@rth.ninka.net> <200210231542.48673.roy@karlsbakk.net> <20021023170102.GA5302@outpost.ds9a.nl>
Sender: netdev-bounce@xxxxxxxxxxx
bert hubert wrote:

> I still refuse to believe that a 1.8GHz Pentium4 can only checksum
> 250megabits/second. MD Raid5 does better and they probably don't use a
> checksum as braindead as that used by TCP.
> 
> If the checksumming is not the problem, the copying is, which would be a
> weakness of your hardware. The function profiled does both the copying and
> the checksumming.

Yep, its not so much the checksumming as the fact that this is
done over each byte of data and copied.

thanks,
Nivedita


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