Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 22 Oct 2001 02:51:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 22 Oct 2001 02:51:23 -0400 Received: from [12.2.11.164] ([12.2.11.164]:52754 "EHLO www.bradycorp.com") by vger.kernel.org with ESMTP id convert rfc822-to-8bit; Mon, 22 Oct 2001 02:51:15 -0400 Subject: Re: kapmidled and AMD K6-2 To: pavel@suse.cz Cc: davej@suse.de, kernel@Expansa.sns.it, linux-kernel@vger.kernel.org, pavel@suse.cz X-Mailer: Lotus Notes Edition France 5.0.2c 8 =?iso-8859-1?q?f=E9vrier_2000?= Message-ID: From: Jose_Jorge@teklynx.fr Date: Mon, 22 Oct 2001 07:57:32 +0100 X-MIMETrack: Serialize by Router on GHOWBL01/BradyWeb(Release 5.0.5 |September 22, 2000) at 10/22/2001 01:39:40 AM MIME-Version: 1.0 Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org When I say too hot, I mean as hot as when full-loaded when it is idle. More precisely, less than 30?C when I am watching TV, so that I don't hear the CPU fan! Jos? /----------------------------------------------------------------------------\ | Jos? Jorge | | TEKLYNX International http://www.teklynx.com | \----------------------------------------------------------------------------/ Pavel Machek , Pavel Machek z> cc: Dave Jones , Jose_Jorge@teklynx.fr, linux-kernel@vger.kernel.org Subject: Re: kapmidled and AMD K6-2 19/10/2001 21:05 Hi! > Excuse me, I ma quite curious. I had 50 K6-2, (from 350 to 500 Mhz), in > the SNS CED, so I would like to know when you say it is too hot, what > temperature are you talking about? In my experience I had some k6 > 500 working > for 360 days continously fully loaded with a temperature of 55 degrees on > the processor, and it was ever stable. On the other side, I saw a 450 Mhz > processor to be unstable being ideld at 50 degrees (the fan was > not properly working). I have a quite good idea when a K6 could be > damnaged by temperature. Ohh, that is really important, did you make some > burn in to your processors? On my k6-2, cpu fan starts cooling on 30 celsia. But I do not know where the sensor is ;-) > Luigi > > > On Fri, 12 Oct 2001, Pavel Machek wrote: > > > Hi! > > > > > > for the AMD K6-2 on a DFI motherboard AT/ATX, using the AT power supply, > > > > this option is buggy. I mean the cycles kapmidled works doesn't cool the > > > > processor, they hot him. > > > > > > Initially, I thought was odd. The spec seemed straight forward > > > enough, and doesn't say we have to do any special magic. > > > Just that "During the execution of the HLT instruction, the AMD-K6-2 > > > processor executes a Halt special cycle." > > > > > > The next bit is interesting however.. > > > > > > "After BRDY# is sampled asserted during this cycle, and then EWBE# > > > is also sampled asserted (if not masked off), the processor enters > > > the halt state in which the processor disables most of its internal > > > clock distribution." > > > > > > EWBE is a feature that is enabled with bits 2-3 of the EFER MSR. > > > This controls the behaviour of the CPU with respect to ordering > > > of write cycles. Behaviour here can affect performance, and from > > > my interpretation of the above, the amount of power saving that > > > is possible. > > > > > > You can control the EWBE register using powertweak > > > (http://www.powertweak.org), but if you don't want to/are unable > > > to build that, and want to do some further tests, let me know > > > and I'll hack something up. > > > > If I don't want to build powertweak, are you willing to hack something up > > for me? ;-). [My k6-2 is too hot to slow down CPU fan. I tried throttling > > it using ACPI, but no success. I want to cool it down so that fan slows > > and machine becomes quiet.] -- STOP THE WAR! Someone killed innocent Americans. That does not give U.S. right to kill people in Afganistan. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/