Re: PROBLEM: high system usage / poor SMP network performance

Vincent Sweeney (v.sweeney@barrysworld.com)
Sun, 27 Jan 2002 23:08:58 -0000


----- Original Message -----
From: "Alan Cox" <alan@lxorguk.ukuu.org.uk>
To: "Vincent Sweeney" <v.sweeney@barrysworld.com>
Cc: <linux-kernel@vger.kernel.org>
Sent: Sunday, January 27, 2002 10:54 PM
Subject: Re: PROBLEM: high system usage / poor SMP network performance

> > CPU0 states: 27.2% user, 62.4% system, 0.0% nice, 9.2% idle
> > CPU1 states: 28.4% user, 62.3% system, 0.0% nice, 8.1% idle
>
> The important bit here is ^^^^^^^^ that one. Something is causing
> horrendous lock contention it appears. Is the e100 driver optimised for
SMP
> yet ? Do you get better numbers if you use the eepro100 driver ?

It's been a while since I tested with the eepro100 drivers (I switch to e100
about 2.4.4 due to some unrelated problems) so I cannot give a comparision
just at present. I will test the eepro100 driver tomorrow on one of the
servers and post results then.

I will also try Andrew Morton's profiling tips on another box with the e100
driver.

Vince.

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