From owner-freebsd-current Fri Jan 31 12: 3:31 2003 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 39E3137B401 for ; Fri, 31 Jan 2003 12:03:30 -0800 (PST) Received: from smtp.comcast.net (smtp.comcast.net [24.153.64.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id AF87443F79 for ; Fri, 31 Jan 2003 12:03:29 -0800 (PST) (envelope-from trish@bsdunix.net) Received: from femme.sapphite.org (pcp02268182pcs.longhl01.md.comcast.net [68.50.99.190]) by mtaout05.icomcast.net (iPlanet Messaging Server 5.2 HotFix 1.09 (built Jan 7 2003)) with ESMTP id <0H9L00J4RH1S1B@mtaout05.icomcast.net> for freebsd-current@FreeBSD.ORG; Fri, 31 Jan 2003 15:03:29 -0500 (EST) Received: from localhost (trish@localhost [127.0.0.1]) by femme.sapphite.org (8.12.6/8.12.6) with ESMTP id h0VK0fxj063783; Fri, 31 Jan 2003 15:00:41 -0500 (EST envelope-from trish@bsdunix.net) Date: Fri, 31 Jan 2003 15:00:41 -0500 (EST) From: Trish Lynch Subject: Re: Hyperthreading and machdep.cpu_idle_hlt In-reply-to: <20030131194817.335B72A89E@canning.wemm.org> X-X-Sender: To: Peter Wemm Cc: Bosko Milekic , Matthew Dillon , "Daniel C. Sobral" , Trish Lynch , freebsd-current@FreeBSD.ORG Message-id: <20030131145804.S1357-100000@femme> MIME-version: 1.0 Content-type: TEXT/PLAIN; charset=US-ASCII Content-transfer-encoding: 7BIT Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Fri, 31 Jan 2003, Peter Wemm wrote: > > Personally, I doubt that HTT will buy much on FreeBSD, apart from being > buzzword compliant. I'd actually like a compile option or boot tunable so > that it to be turned on or off (and treated like a regular Xeon SMP > system). Single-physical-cpu systems already have this compile option, it > is called 'options SMP' :-). But if you have 2x P4 Xeons, it would be nice to > be able to use them as a normal 2 way system rather than 4 logical ways. > boot tunable would rock, then I wouldn;t have to had had BIOS access to a machine thats 2 hours away by car to turn HTT off (it just happened that it was enabled by default when they installed the machine) (which of course made it nice to try this on, but getting the second set of data with HTT turned off is going to be a pain) What I need is someone with an HTT capable SMP box that can turn it on and off to run these benchmarks with HTT on and off... then we'd have a good idea of the performance hit. -Trish -- Trish Lynch trish@bsdunix.net Ecartis Core Team trish@listmistress.org EFNet IRC Operator @ efnet.demon.co.uk AilleCat@EFNet Key fingerprint = 781D 2B47 AA4B FC88 B919 0CD6 26B2 1D62 6FC1 FF16 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message