Date: Wed, 28 Mar 2001 01:31:46 +0200 (CEST) From: "Hartmann, O." <ohartman@klima.physik.uni-mainz.de> To: "Karsten W. Rohrbach" <karsten@rohrbach.de> Cc: David Malone <dwmalone@maths.tcd.ie>, <freebsd-stable@freebsd.org> Subject: Re: Overheated PIII in SMP system Message-ID: <Pine.BSF.4.33.0103280130300.591-100000@klima.physik.uni-mainz.de> In-Reply-To: <20010328005952.D51215@mail.webmonster.de>
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On Wed, 28 Mar 2001, Karsten W. Rohrbach wrote:
Both CPUs seems to be of the same stepping:
MP Config Base Table Entries:
--
Processors: APIC ID Version State Family Model Step Flags
1 0x11 BSP, usable 6 7 3 0x387fbff
0 0x11 AP, usable 6 7 3 0x387fbff
--
:>David Malone(dwmalone@maths.tcd.ie)@2001.03.27/23:12:29(epoch+985731149s):
:>> 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.
:>even worse, the idle loop is executed differently depending on the cpu
:>stepping. you can "feel" it when you run beos5 pro on a dual p-iii with
:>stepping 5 cpus. they get hot like hell. when you use stepping 6 cpus
:>everything is fine.
:>
:>/k
:>
:>--
:>> If you don't understand or are scared by any of the above
:>> ask your parents or an adult to help you.
:>KR433/KR11-RIPE -- http://www.webmonster.de -- ftp://ftp.webmonster.de
:>
:>
--
MfG
O. Hartmann
ohartman@klima.physik.uni-mainz.de
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