From owner-freebsd-questions@FreeBSD.ORG Wed Nov 10 07:03:50 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id ACA68106566C for ; Wed, 10 Nov 2010 07:03:50 +0000 (UTC) (envelope-from liontaur@gmail.com) Received: from mail-bw0-f54.google.com (mail-bw0-f54.google.com [209.85.214.54]) by mx1.freebsd.org (Postfix) with ESMTP id 372458FC12 for ; Wed, 10 Nov 2010 07:03:49 +0000 (UTC) Received: by bwz2 with SMTP id 2so381013bwz.13 for ; Tue, 09 Nov 2010 23:03:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=2KE4V5dZP0W2t+LPP85WyBPSHXCZR935DQEKnnHprbU=; b=NUvlvX6y/phAhafpXXJOuSi2tzz8aae68tK2lSiIU3KaLDRES/HV0VOYepYVg/KXts IWwtaNSCsvfixPjA8iMCyOV6PEBiLxLO/7b77eDPf0gZszprCy5WKxD9rJbH7PVPC387 JlHWVLUdxulLyoBdHYKKkwha/A9biL4yj8+7g= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=DLGMghVZIXLnCsH0gRkEMIhinJCabC5aPSCFPcBYPElbhJ2EispCPY3nctdpOGAShJ REjvT/tbj/EF7keeulINUQL4oA1NPBb88Ajx26KaUr6kz2F/25Cy4O8I1TGTX9Ch2elG PIQNA2fHZ/PG+JPHW2fbFZwrPjh9qJ8hmdSvs= MIME-Version: 1.0 Received: by 10.204.97.141 with SMTP id l13mr110143bkn.184.1289372628843; Tue, 09 Nov 2010 23:03:48 -0800 (PST) Received: by 10.204.4.196 with HTTP; Tue, 9 Nov 2010 23:03:48 -0800 (PST) In-Reply-To: References: <201011091256.51140.naylor.b.david@gmail.com> <4CD949D7.6030003@stillbilde.net> Date: Tue, 9 Nov 2010 23:03:48 -0800 Message-ID: From: Liontaur To: freebsd-questions@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: Re: Per core frequency control X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Nov 2010 07:03:50 -0000 On Tue, Nov 9, 2010 at 9:54 AM, David Brodbeck wrote: > On Tue, Nov 9, 2010 at 5:17 AM, Svein Skogen (Listmail account) > wrote: > > You did read the "symmetric" part of "symmetric multi processor" didn't > you? > > > > It's a limitation of the technology. One clock. > > I don't think that's quite true. The newer Intel server chipsets have > the ability to throttle back idle cores and boost the speed of active > ones, to improve performance on single-threaded workloads. > AMD has similar technology on the Phenom's as well. I'm not sure how factually accurate the following link's assessment is but it's a good read either way. http://www.anandtech.com/show/3641/amd-divulges-phenom-ii-x6-secrets-turbo-core-enabled Mark