From owner-freebsd-questions@FreeBSD.ORG Tue Apr 26 00:54:55 2005 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id ED74416A4CE for ; Tue, 26 Apr 2005 00:54:55 +0000 (GMT) Received: from cobalt.antimatter.net (cobalt.antimatter.net [69.55.224.239]) by mx1.FreeBSD.org (Postfix) with ESMTP id C13E943D67 for ; Tue, 26 Apr 2005 00:54:55 +0000 (GMT) (envelope-from glenn@antimatter.net) Received: from glenn-mobile.antimatter.net (cpe-66-27-94-59.san.res.rr.com [66.27.94.59]) (authenticated bits=0)j3Q1Nc4s016442 (version=TLSv1/SSLv3 cipher=DES-CBC3-SHA bits=168 verify=NO) for ; Mon, 25 Apr 2005 18:23:38 -0700 Message-Id: <6.1.0.6.2.20050425174609.0edc19c0@cobalt.antimatter.net> X-Sender: lists@cobalt.antimatter.net X-Mailer: QUALCOMM Windows Eudora Version 6.1.0.6 Date: Mon, 25 Apr 2005 17:54:20 -0700 To: freebsd-questions@freebsd.org From: Glenn Dawson In-Reply-To: References: <426CC4D7.2070101@cyanide-studio.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Subject: Hyperthreading and schedulers [was Re: looking for a good sata or scsi raid 0/1 controller] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 Apr 2005 00:54:56 -0000 At 05:33 PM 4/25/2005, Mike Tancsa wrote: >I would start by turning off Hyperthreading as >that only really works if you are using the ULE scheduler and thats >broken under RELENG_5. I haven't noticed this mentioned before. Is using an SMP kernel on a system with a single P4 and SCHED_4BSD a waste of time? Is it detrimental? I've never noticed any problems myself, but I never went looking for any either. -Glenn