From owner-freebsd-questions@FreeBSD.ORG  Sat Nov  9 09:25:40 2013
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTP id E2E61D66
 for <freebsd-questions@freebsd.org>; Sat,  9 Nov 2013 09:25:40 +0000 (UTC)
 (envelope-from adrian.chadd@gmail.com)
Received: from mail-qe0-x229.google.com (mail-qe0-x229.google.com
 [IPv6:2607:f8b0:400d:c02::229])
 (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits))
 (No client certificate requested)
 by mx1.freebsd.org (Postfix) with ESMTPS id A36CD2383
 for <freebsd-questions@freebsd.org>; Sat,  9 Nov 2013 09:25:40 +0000 (UTC)
Received: by mail-qe0-f41.google.com with SMTP id x7so2946756qeu.14
 for <freebsd-questions@freebsd.org>; Sat, 09 Nov 2013 01:25:39 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:sender:in-reply-to:references:date:message-id:subject
 :from:to:cc:content-type;
 bh=MtPRh9zthVwFO+5CH2cYAT/t0ZpMzog8j463F8lIoSI=;
 b=UgDpMxYTJZSr6SlyJ9Ua5qlLFcfurkmKwCy9nRluKnbWjq6iPOwjTQeEKhs9sz+dw1
 p8UhES93xWnkGkMUOv9SQW3JskcJ0PzUWvZYCK2pU4Whyu732HREmc0nqcTI8ACAIApu
 JPe/lSvODs4rl4NaiCT7E63i5VzcXVCjeVz0IGP1iuPC/expAVfw+kSErCpxw3CYvEdv
 lhJct9xX82O1rUbJl7deW5YB3wXJmJVW0Kj0HxYXaL/rLXbRgTFLJaNtBWaUB2RxA5Tu
 2qwdP/VzQyq+vFoYiIC0EWKqCEf6sSmIR2R+Ym2OPZBL128H9h5CNCXxu2s7OkO36Yel
 5Xcw==
MIME-Version: 1.0
X-Received: by 10.49.19.101 with SMTP id d5mr29148542qee.78.1383989139941;
 Sat, 09 Nov 2013 01:25:39 -0800 (PST)
Sender: adrian.chadd@gmail.com
Received: by 10.224.207.66 with HTTP; Sat, 9 Nov 2013 01:25:39 -0800 (PST)
In-Reply-To: <alpine.BSF.2.00.1311081704080.84892@wonkity.com>
References: <70EC0F10-FAD0-4EA6-8C1F-A95B1C786B7B@gmail.com>
 <20131031153757.GG63947@dan.emsphone.com>
 <4A2AEF45-5185-4ED7-98BD-B6975C79A5B9@gmail.com>
 <alpine.BSF.2.00.1311081704080.84892@wonkity.com>
Date: Sat, 9 Nov 2013 01:25:39 -0800
X-Google-Sender-Auth: pIXQdIFEY3Rk72ejcsFVWVKSolQ
Message-ID: <CAJ-VmompRXZURweoz85E1A7x6iYJ-Gp5rWx0F9e1W7wq54ZZhA@mail.gmail.com>
Subject: Re: CPU Turbo mode
From: Adrian Chadd <adrian@freebsd.org>
To: Warren Block <wblock@wonkity.com>
Content-Type: text/plain; charset=ISO-8859-1
Cc: Dan Nelson <dnelson@allantgroup.com>,
 FreeBSD Mailing List <freebsd-questions@freebsd.org>,
 aurfalien <aurfalien@gmail.com>
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 09 Nov 2013 09:25:40 -0000

On 8 November 2013 16:08, Warren Block <wblock@wonkity.com> wrote:

> When it shows 2201, it's in Turbo mode.  I don't know if there is anywhere
> that shows the actual speed of the single core that is going faster.

I enabled this on a 4-core sandy bridge (E3-1260L IIRC) and all four
cores suddenly grew a few % more clock cycles. But, it was on a server
whose fans are cranked high anyway, so the CPU temperature only grew a
degree or two.

I think Turbo Boost is boosting all cores that have work on it; it's
up to the thread/process scheduler to keep the thermal envelope such
that the overclocking works.


-adrian