Date: Wed, 5 Mar 2003 08:27:29 +0000 From: David Malone <dwmalone@maths.tcd.ie> To: "Imtiaz, Fazle" <fimtiaz@Hanovermeasurement.com> Cc: freebsd-stable@freebsd.org Subject: Re: Hyper Threading Support in FreeBSD 4.7 Message-ID: <20030305082729.GA26393@walton.maths.tcd.ie> In-Reply-To: <BDF3DCC808D4954992A60F14955BC33106BB70@HOUCORPEX1.HMS-CORP.HANOVERMEASUREMENT.COM> References: <BDF3DCC808D4954992A60F14955BC33106BB70@HOUCORPEX1.HMS-CORP.HANOVERMEASUREMENT.COM>
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On Tue, Mar 04, 2003 at 08:27:21PM -0600, Imtiaz, Fazle wrote: > I run a very high traffic web site with FreeBSD 4.7 and am considering > moving into Dual Xeon based platform. Does FreeBSD 4.7 support > hyper threading and if it does, are there any known issues and problems > with it? My system is already SMP enabled, does anything special need > to be done? 4.7 supports hyperthreading only if the BIOS includes the virtual CPUs in the MP table. Some BIOSes do this, and others do not. 4.8-PRERELEASE will always enable hyperthreading if the processors are capable of it. 4.8-RELEASE will probably make this a kernel option, so people who don't want hyperthreading can turn it off. John Balwdin is finalising the details of the option at the moment. David. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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