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Re: bad TSO performance in 2.6.9-rc2-BK

To: Andi Kleen <ak@xxxxxxx>
Subject: Re: bad TSO performance in 2.6.9-rc2-BK
From: "David S. Miller" <davem@xxxxxxxxxxxxx>
Date: Wed, 22 Sep 2004 15:50:31 -0700
Cc: ak@xxxxxxx, andy.grover@xxxxxxxxx, anton@xxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <20040922224732.GD2619@wotan.suse.de>
References: <20040920063012.GL2825@krispykreme> <20040920203021.GD4242@wotan.suse.de> <20040921155835.18aee381.davem@davemloft.net> <20040922140000.GD27432@wotan.suse.de> <20040922111209.7887df53.davem@davemloft.net> <20040922195515.GA2619@wotan.suse.de> <c0a09e5c04092213126ba5f29d@mail.gmail.com> <20040922133906.7d57ef49.davem@davemloft.net> <20040922220628.GC2619@wotan.suse.de> <20040922152535.7bc81c8a.davem@davemloft.net> <20040922224732.GD2619@wotan.suse.de>
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On Thu, 23 Sep 2004 00:47:32 +0200
Andi Kleen <ak@xxxxxxx> wrote:

> 22-23MB/s, but not 21MB/s. Ok "breaks completely" was a bit of overstatement,
> admitted.

Right.

Can you do some of the tcp_snd_test() debugging I suggested above
the patch you just tested?  I really need help debugging this
as I cannot reproduce it locally.


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