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List:       freebsd-smp
Subject:    Re: unusually high temperature with smp kernel on ABit BP6
From:       Junichi Saito <j.saito () wanadoo ! fr>
Date:       2000-08-26 12:20:45
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On Sat, 26 Aug 2000 sthaug@nethelp.no wrote:

>> The motherboard temperature keeps getting higher (easily reaching over
>> 50°C in some minutes) after booting when a smp kernel is loaded, even if
>> the machine is almost 100% idle. With an up kernel, the temperature gets
>> down to under 40°C some minutes after the booting.
>
>This was discussed extensively a couple of months ago, and as far as I
>remember no completely satisfactory solution was identified. The problem
>is that the UP code halts the CPU when it is idle, while SMP code does
>not.
>
>I (and several others) have been running with the following simple patch
>to /sys/i386/i386/swtch.s. It seems to do the job here.
>
>Steinar Haug, Nethelp consulting, sthaug@nethelp.no

Thank you for the quick reply. The patch indeed fixed the problem. I
should have searched more carefully the archives.

j.




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