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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: Mon, 27 Sep 2004 17:15:20 -0700
Cc: ak@xxxxxxx, jheffner@xxxxxxx, niv@xxxxxxxxxx, andy.grover@xxxxxxxxx, anton@xxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <20040927235117.GC15825@wotan.suse.de>
References: <20040923161141.4ea9be4c.davem@davemloft.net> <Pine.NEB.4.33.0409271416360.14606-100000@dexter.psc.edu> <20040927160411.22b44f48.davem@davemloft.net> <20040927232554.GB15825@wotan.suse.de> <20040927163751.274f6071.davem@davemloft.net> <20040927235117.GC15825@wotan.suse.de>
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On Tue, 28 Sep 2004 01:51:17 +0200
Andi Kleen <ak@xxxxxxx> wrote:

> Looks like the e1000 is too fast...

Yes, the e1000 does TSO expansion much faster than the MIPS
cpus on the tg3.  I believe the e1000 implementation is
in the ASIC instead of being implemented with a firmware
runing on a general purpose on-board processor.

In the 5705 and later revisions, the tg3 implements TSO
in the ASIC as well.

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