From owner-freebsd-stable@FreeBSD.ORG Tue Sep 8 14:25:41 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8917F1065695 for ; Tue, 8 Sep 2009 14:25:41 +0000 (UTC) (envelope-from hrkfdn@gmail.com) Received: from mail-ew0-f208.google.com (mail-ew0-f208.google.com [209.85.219.208]) by mx1.freebsd.org (Postfix) with ESMTP id 1EA908FC25 for ; Tue, 8 Sep 2009 14:25:40 +0000 (UTC) Received: by ewy4 with SMTP id 4so1705911ewy.36 for ; Tue, 08 Sep 2009 07:25:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=eNoimdiCNinFB5nocpx2QhAnTEuEzKZzS1ZLa5bH/C0=; b=QpB9W9/UAB3RSBMOkIT72MCVypTxlnbk3HuegxF+d8+1dIboo87bYNwYRbxmX2yFey hO0Ad05qDYoZ25MDWQfsAgAGvlH4Rdl8n2n/Qv04GwAPUJC10fvazuWXIv5Nd00GpKnV FZ+0Z3rgZafS7e2aso1G+d0JqAj2mvferACSo= 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:content-transfer-encoding; b=AnR0owBajn/CEF2tDPNrDB9aSpvfwD7xF23Q7k3PZIiWLE02K/akgSYJ4BgrxpenqF BiZ5F2jjUDRwnavx77leuD1oR+peWC7CYNZoc8lr1A8mF9xbNS2qHT0vX7Uyxmjgk0qf 01Igy0tBf2GnocwdZ5Oz8SqpUNzbwBE10hYxo= MIME-Version: 1.0 Received: by 10.211.128.9 with SMTP id f9mr17597905ebn.93.1252417967940; Tue, 08 Sep 2009 06:52:47 -0700 (PDT) In-Reply-To: <200909082209.37454.doconnor@gsoft.com.au> References: <200909082209.37454.doconnor@gsoft.com.au> Date: Tue, 8 Sep 2009 15:52:47 +0200 Message-ID: From: Henrik Friedrichsen To: FreeBSD Stable Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: Re: Detecting CPU throttling on over temperature X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Sep 2009 14:25:41 -0000 I don't know whether there is a more convenient way, but you could definitely check the current CPU frequency to detect whether it changed from the previous one or not. There are several ways to this, depends on the CPU. You can try messing with cpufreq(4). On Tue, Sep 8, 2009 at 2:39 PM, Daniel O'Connor wrot= e: > Hi, > I recently discovered a system where the floppy drive cable was > intermittently fouling the CPU fan - I believe this caused the CPU to > overheat and then get throttled by the BIOS. > > Does anyone know if it is possible to determine if this is the case? ie > is there a way to be informed if throttling has occurred? > > Thanks. > > -- > Daniel O'Connor software and network engineer > for Genesis Software - http://www.gsoft.com.au > "The nice thing about standards is that there > are so many of them to choose from." > =C2=A0-- Andrew Tanenbaum > GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C >