From owner-freebsd-questions@FreeBSD.ORG Tue Nov 9 17:54:07 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 CDE2B106564A for ; Tue, 9 Nov 2010 17:54:07 +0000 (UTC) (envelope-from gull@gull.us) Received: from mail-ew0-f54.google.com (mail-ew0-f54.google.com [209.85.215.54]) by mx1.freebsd.org (Postfix) with ESMTP id 6BB508FC14 for ; Tue, 9 Nov 2010 17:54:07 +0000 (UTC) Received: by ewy28 with SMTP id 28so3833786ewy.13 for ; Tue, 09 Nov 2010 09:54:06 -0800 (PST) MIME-Version: 1.0 Received: by 10.213.22.82 with SMTP id m18mr756495ebb.1.1289325246147; Tue, 09 Nov 2010 09:54:06 -0800 (PST) Received: by 10.14.127.1 with HTTP; Tue, 9 Nov 2010 09:54:05 -0800 (PST) X-Originating-IP: [64.81.163.112] In-Reply-To: <4CD949D7.6030003@stillbilde.net> References: <201011091256.51140.naylor.b.david@gmail.com> <4CD949D7.6030003@stillbilde.net> Date: Tue, 9 Nov 2010 09:54:05 -0800 Message-ID: From: David Brodbeck To: freebsd-questions@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 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: Tue, 09 Nov 2010 17:54:07 -0000 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.