Date: Tue, 27 Mar 2001 23:12:29 +0100 From: David Malone <dwmalone@maths.tcd.ie> To: "Hartmann, O." <ohartman@klima.physik.uni-mainz.de> Cc: freebsd-stable@freebsd.org Subject: Re: Overheated PIII in SMP system Message-ID: <20010327231229.A83433@walton.maths.tcd.ie> In-Reply-To: <Pine.BSF.4.33.0103280001420.1075-100000@klima.physik.uni-mainz.de>; from ohartman@klima.physik.uni-mainz.de on Wed, Mar 28, 2001 at 12:02:04AM %2B0200 References: <Pine.BSF.4.33.0103280001420.1075-100000@klima.physik.uni-mainz.de>
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> some kind of weakness in voltage regulation? But why only in SMP > mode of the kernel and not in UP mode?). Or the CPU has some faults. We saw this with our first dual processor PIII system and replacing the problem with better fans did help. We found that we could aslo reproduce the problem while running Linux on the machine (with the old fans). I have a feeling that the idle loop for the processor may not use the halt instruction under some SMP conditions. This might explain the heating, but I've never looked hard to figure out the exact reason for this, or weither it is a full explaniation. David. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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