From: jmk@plan9.bell-labs.com
To: 9fans@cse.psu.edu
Subject: Re: [9fans] hyperthreading
Date: Fri, 26 Dec 2003 19:00:01 -0500 [thread overview]
Message-ID: <e22617b7b2cd8262db779d45e48c9648@plan9.bell-labs.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0312261603500.13081-100000@fbsd.cpsc.ucalgary.ca>
On Fri Dec 26 18:06:45 EST 2003, mirtchov@cpsc.ucalgary.ca wrote:
> quick question:
>
> will Plan 9 work with hyperthreading processors? will it recognize them as
> dual-cpus?
>
> can you share experience with those?
>
> thanks: andrey
Depends. In 2002 we bought a dual-processor Xeon machine with
hyperthreading. After enabling the hyperthreading option in the
BIOS setup Plan 9 detects and uses 4 processors. (I don't think
it makes much, if any, improvement to the system's performance).
Earlier this month we tried a new single-processor P4 system
with hyperthreading. Even with the BIOS option set the BIOS MP
table only contains a single processor entry. I haven't bothered
yet to look to see if there's some BIOS problem or if there's
some other way to take advantage of hyperthreading on this
system.
next prev parent reply other threads:[~2003-12-27 0:00 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-26 23:05 andrey mirtchovski
2003-12-27 0:00 ` jmk [this message]
2003-12-27 18:39 ` jmk
2003-12-28 16:11 ` ron minnich
2003-12-28 22:12 ` Joel Salomon
2003-12-29 1:47 ` William Josephson
2003-12-31 17:08 ` ron minnich
2004-01-05 11:03 ` Vasile Rotaru
2004-01-05 14:31 ` David Presotto
2004-01-05 15:32 ` ron minnich
2003-12-27 4:10 ` [9fans] fossil/venti vdharani
2003-12-27 4:49 ` okamoto
2003-12-27 7:52 ` vdharani
2003-12-27 5:20 ` mirtchov
2003-12-28 4:47 ` okamoto
2003-12-28 8:22 ` vdharani
2003-12-28 6:40 ` andrey mirtchovski
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