From: Charles Cazabon <linux-kernel@discworld.dyndns.org>
To: Linux Kernel List <linux-kernel@vger.kernel.org>
Subject: Re: Dual Athlon XP 1800+ on Tyan Thunder K7 or Tiger MP anyone?
Date: Wed, 10 Oct 2001 08:45:37 -0600 [thread overview]
Message-ID: <20011010084537.C29131@qcc.sk.ca> (raw)
In-Reply-To: <20011009211625Z277979-760+22927@vger.kernel.org> <3BC371B2.6010405@interactivesi.com> <1002665547.1543.123.camel@phantasy> <20011009161737.A14175@qcc.sk.ca> <1002668084.1673.137.camel@phantasy>
In-Reply-To: <1002668084.1673.137.camel@phantasy>; from rml@tech9.net on Tue, Oct 09, 2001 at 06:54:42PM -0400
Robert Love <rml@tech9.net> wrote:
> On Tue, 2001-10-09 at 18:17, Charles Cazabon wrote:
> > They work, but not "fine". There are performance issues with
> > Thunderbird-core Athlons in SMP configurations that may slow them down
> > somewhat.
>
> Are you sure it is related to SMP and not the fact the Palomino core is
> faster in general?
Yes, it's an architectural problem with the Thunderbird core. It turns
out that in SMP configurations, the Thunderbird can actually hinder
performance in certain cases (i.e. benchmarks show very little
performance improvement for dual Thunderbirds over single Thunderbird,
while same software scales almost linearly with dual Palominos over
single Palomino).
I don't recall the exact cause, but I think it had something to do with
poor cache interaction -- cache-line ping-pong perhaps?
Charles
--
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Charles Cazabon <linux@discworld.dyndns.org>
GPL'ed software available at: http://www.qcc.sk.ca/~charlesc/software/
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next prev parent reply other threads:[~2001-10-10 14:45 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-09 21:16 Dual Athlon XP 1800+ on Tyan Thunder K7 or Tiger MP anyone? Dieter Nützel
2001-10-09 21:52 ` Timur Tabi
2001-10-09 22:06 ` Dan Hollis
2001-10-16 1:46 ` Dr. Kelsey Hudson
2001-10-16 2:22 ` Dan Hollis
2001-10-09 22:12 ` Robert Love
2001-10-09 20:58 ` David Lang
2001-10-09 22:30 ` Dan Hollis
2001-10-09 22:43 ` Robert Love
2001-10-11 19:14 ` bill davidsen
2001-10-11 19:22 ` nick
2001-10-15 21:30 ` Bill Davidsen
2001-10-15 21:58 ` Dan Hollis
2001-10-11 19:24 ` Jeffrey W. Baker
2001-10-15 21:37 ` Bill Davidsen
2001-10-15 21:57 ` Joel Jaeggli
2001-10-15 22:07 ` Timur Tabi
2001-10-16 18:40 ` Hans-Peter Jansen
2001-10-15 22:08 ` John Jasen
2001-10-15 22:20 ` Wilson
2001-10-16 12:23 ` Bill Davidsen
2001-10-11 21:19 ` John J Tobin
2001-10-12 19:32 ` Joel Jaeggli
2001-10-12 19:46 ` Jeff Nguyen
2001-10-12 20:32 ` Jelle Foks
2001-10-09 22:17 ` Charles Cazabon
2001-10-09 22:24 ` Dan Hollis
2001-10-09 21:09 ` David Lang
2001-10-09 22:32 ` Dan Hollis
2001-10-09 22:27 ` German Gomez Garcia
2001-10-09 22:54 ` Robert Love
2001-10-10 14:45 ` Charles Cazabon [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-10-09 22:41 Dieter Nützel
2001-10-09 23:14 Dieter Nützel
2001-10-17 19:38 Thomas Esser
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