From owner-freebsd-questions@FreeBSD.ORG Thu Sep 15 16:12:23 2005 Return-Path: X-Original-To: questions@freebsd.org Delivered-To: freebsd-questions@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9269316A41F for ; Thu, 15 Sep 2005 16:12:23 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from smtpout.mac.com (smtpout.mac.com [17.250.248.83]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5BC4D43D46 for ; Thu, 15 Sep 2005 16:12:23 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from mac.com (smtpin01-en2 [10.13.10.146]) by smtpout.mac.com (Xserve/8.12.11/smtpout07/MantshX 4.0) with ESMTP id j8FGCHBo020835; Thu, 15 Sep 2005 09:12:18 -0700 (PDT) Received: from [10.1.1.209] (nfw1.codefab.com [199.103.21.225]) (authenticated bits=0) by mac.com (Xserve/smtpin01/MantshX 4.0) with ESMTP id j8FGCFAg006445; Thu, 15 Sep 2005 09:12:17 -0700 (PDT) In-Reply-To: <20050915183641.6cd744a2.atissita@btv.lv> References: <20050915183641.6cd744a2.atissita@btv.lv> Mime-Version: 1.0 (Apple Message framework v734) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <94335D73-6A4C-4D54-A766-CE0B451CF2C2@mac.com> Content-Transfer-Encoding: 7bit From: Charles Swiger Date: Thu, 15 Sep 2005 12:11:59 -0400 To: Atis X-Mailer: Apple Mail (2.734) Cc: questions@freebsd.org Subject: Re: keeping CPU usage low 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: Thu, 15 Sep 2005 16:12:23 -0000 On Sep 15, 2005, at 11:36 AM, Atis wrote: > Is there a way to make the kernel HALT the CPU regularly even > when it has got runnable processes? Sort of like increasing the idle > thread priority? > > The problem is with one my computers which has a buggy CPU. No > matter how many or how powerful fans I install, when there's > a CPU usage of 100% for over ~5 minutes it just overheats > and crashes the system. If your system hardware supports ACPI power management, you might be able to use the powerd/cpufreq stuff to throttle your CPU to a lower speed. You might also try underclocking the CPU in your BIOS and/or or set it to a lower clock divider depending on the details of what your hardware supports. -- -Chuck