From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: HT Benchmarks (was: /proc/cpuinfo and hyperthreading)
Date: 16 Dec 2002 15:50:04 -0800 [thread overview]
Message-ID: <atlorc$sds$1@cesium.transmeta.com> (raw)
In-Reply-To: FKEAJLBKJCGBDJJIPJLJAEOLDLAA.scott@coyotegulch.com
Followup to: <FKEAJLBKJCGBDJJIPJLJAEOLDLAA.scott@coyotegulch.com>
By author: "Scott Robert Ladd" <scott@coyotegulch.com>
In newsgroup: linux.dev.kernel
>
> From what I can see, HT provides a 0-15% increase in performance, depending
> heavily on the type of code being run. In other words, HT helps, but it is
> *no* substitute for true multiple processors. And it is ONLY of value when
> an SMP kernel is in use.
>
It would be interesting to compare an UP kernel with HT off to an SMP
kernel with the HT on...
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com>
next prev parent reply other threads:[~2002-12-16 23:42 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200212160004.gBG04g130091@hera.kernel.org>
2002-12-16 2:34 ` [XFS] add missing file xfs_iomap.c Anders Gustafsson
2002-12-16 3:58 ` /proc/cpuinfo and hyperthreading Scott Robert Ladd
2002-12-16 4:02 ` Robert Love
2002-12-16 4:13 ` Scott Robert Ladd
2002-12-16 6:28 ` Zwane Mwaikambo
2002-12-16 6:35 ` Zwane Mwaikambo
2002-12-16 13:38 ` Scott Robert Ladd
2002-12-16 13:54 ` Brian Jackson
2002-12-16 14:10 ` Richard B. Johnson
2002-12-16 14:56 ` Scott Robert Ladd
2002-12-16 15:11 ` Måns Rullgård
2002-12-16 15:44 ` HT Benchmarks (was: /proc/cpuinfo and hyperthreading) Scott Robert Ladd
2002-12-16 22:38 ` J.A. Magallon
2002-12-16 23:21 ` Scott Robert Ladd
2002-12-16 23:27 ` J.A. Magallon
2002-12-17 11:03 ` Denis Vlasenko
2002-12-17 20:44 ` H. Peter Anvin
2002-12-16 23:50 ` H. Peter Anvin [this message]
2002-12-17 19:27 ` Bill Davidsen
2002-12-16 15:52 ` /proc/cpuinfo and hyperthreading Andrew Theurer
2002-12-16 14:08 ` Dave Jones
2002-12-16 14:36 ` Scott Robert Ladd
2002-12-16 4:39 ` [XFS] add missing file xfs_iomap.c Linus Torvalds
[not found] <1_0212161441436926@cichlid.com>
2002-12-18 17:56 ` HT Benchmarks (was: /proc/cpuinfo and hyperthreading) Andrew Burgess
2002-12-19 22:04 ` J.A. Magallon
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