From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "David S. Miller" <davem@redhat.com>,
hadi@cyberus.ca, akpm@digeo.com, manfred@colorfullife.com,
netdev@oss.sgi.com, linux-kernel@vger.kernel.org
Subject: Re: Info: NAPI performance at "low" loads
Date: 18 Sep 2002 18:50:53 +0100 [thread overview]
Message-ID: <1032371453.20463.139.camel@irongate.swansea.linux.org.uk> (raw)
In-Reply-To: <m1hegnky2h.fsf@frodo.biederman.org>
On Wed, 2002-09-18 at 18:27, Eric W. Biederman wrote:
> Plus I have played with calibrating the TSC with outb to port
> 0x80 and there was enough variation that it was unuseable. On some
> newer systems it would take twice as long as on some older ones.
port 0x80 isnt going to PCI space.
x86 generally posts mmio write but not io write. Thats quite measurable.
next prev parent reply other threads:[~2002-09-18 17:43 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-17 19:53 Info: NAPI performance at "low" loads Manfred Spraul
2002-09-17 20:59 ` David S. Miller
2002-09-17 21:32 ` Andrew Morton
2002-09-17 21:26 ` David S. Miller
2002-09-17 21:45 ` Andrew Morton
2002-09-17 21:39 ` David S. Miller
2002-09-17 21:54 ` Jeff Garzik
2002-09-17 21:49 ` David S. Miller
2002-09-18 2:11 ` Jeff Garzik
2002-09-18 2:06 ` David S. Miller
2002-09-18 2:36 ` Jeff Garzik
2002-09-17 21:58 ` Andrew Morton
2002-09-18 0:57 ` jamal
2002-09-18 1:00 ` David S. Miller
2002-09-18 2:16 ` Andrew Morton
2002-09-18 17:27 ` Eric W. Biederman
2002-09-18 17:50 ` Alan Cox [this message]
2002-09-19 14:58 ` Eric W. Biederman
2002-09-18 20:23 ` David S. Miller
2002-09-18 20:43 ` Alan Cox
2002-09-18 20:46 ` David S. Miller
2002-09-18 21:15 ` Alan Cox
2002-09-18 21:22 ` David S. Miller
2002-09-19 15:03 ` Eric W. Biederman
2002-09-19 15:53 ` Alan Cox
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