From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <andi@firstfloor.org>
Subject: Re: [ofa-general] Re: [PATCH 2/3][NET_BATCH] net core use batching
Date: Wed, 10 Oct 2007 11:16:44 +0200
Message-ID: <20071010091644.GA9807@one.firstfloor.org>
References: <1191967006.5324.14.camel@localhost> <20071009.170435.43504422.davem@davemloft.net> <20071010003716.GB552@one.firstfloor.org> <20071009.175025.59469417.davem@davemloft.net>
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Cc: andi@firstfloor.org, hadi@cyberus.ca,
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To: David Miller <davem@davemloft.net>
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> A 256 entry TX hw queue fills up trivially on 1GB and 10GB, but if you

With TSO really? 

> increase the size much more performance starts to go down due to L2
> cache thrashing.

Another possibility would be to consider using cache avoidance
instructions while updating the TX ring (e.g. write combining 
on x86) 

-Andi