From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932068AbWJHWET (ORCPT ); Sun, 8 Oct 2006 18:04:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751493AbWJHWET (ORCPT ); Sun, 8 Oct 2006 18:04:19 -0400 Received: from wx-out-0506.google.com ([66.249.82.231]:35886 "EHLO wx-out-0506.google.com") by vger.kernel.org with ESMTP id S1751491AbWJHWES (ORCPT ); Sun, 8 Oct 2006 18:04:18 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=cUpNngXutSlGfwiKhGgjs+R7nXSTr3nyfPLsPRCzr953n6xzFKSyLHdMem625WU8jRyXbf12KJ4TFm7xBL2Q2ZmR2ee/T3JIa3mPbAX1cwoqkmUNT+26bVRQoaHyjb+NEiC9GMGfcGKNnDWq9C3Bd4F3bs+1o4lQs2bIVZcKSzI= Message-ID: <20f65d530610081504o3a72f654pf60cb9e0278bf2e0@mail.gmail.com> Date: Mon, 9 Oct 2006 11:04:18 +1300 From: "Keith Chew" To: linux-kernel Subject: Re: BIOS THRM-Throttling and driver timings In-Reply-To: <1160343907.3000.183.camel@laptopd505.fenrus.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20f65d530610030729o42658bd6hcc204f8deac4a33e@mail.gmail.com> <1159886437.2891.532.camel@laptopd505.fenrus.org> <20061008211821.GA4280@elf.ucw.cz> <1160343907.3000.183.camel@laptopd505.fenrus.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi > > in general linux should be ok with this happening. However for specific > > cases... you'll need to provide more information; you're not > > mentioning > > Really? AFAICT P4 will happily slow down behind our backs, making at > least udelays() with interrupts disabled sleep for too long. > I believe we are seeing similar behaviours with the drivers. As a temporary workaround, we have asked the manufacturers to supply us with a BIOS that disabled THRM-Throttling. So far, things are looking good, but we are still doing more testing. > > (also: if you actually HIT throttling, there is something very very > > wrong; you're not supposed to hit that unless the fan is defective, but > > never in "normal" healthy operation. If you do hit it without hardware > > defects then there is most likely a fundamental airflow problem you'll > > want to fix urgently) > > At least in toshiba notebook, I was hitting thermal throttling even > through both fans were okay. There are many misdesigned machines out > there, I fear. In our case, we are running the unit in mobile environment, with not much ventilation. In our test environment, the unit runs fine at temperatures of 80-90 degrees. In the real environment, we only expect temperatures of 50-70 degrees. Regards Keith