Re: SMP 2.1.65 drifting time

H. Peter Anvin (hpa@transmeta.com)
23 Nov 1997 13:09:55 GMT

Followup to: <Pine.LNX.3.95.971122125415.819B-100000@orpheus>
By author: Martin Imrisek <modulus@transmeta.com>
In newsgroup: linux.dev.kernel
>
>
> I think this has been discussed already, but I don't recall
> a solution, perhaps I missed it, so please bear with me.
>
> I'm using 2.1.65 on a dual Pentium Tyan Tomcat IV board and I am getting
> incredible drift in the system clock that adds up to about 1hr/day.
> Is there a patch or solution for this?
>

I can confirm that at least 2.1.62-smp will lose enormous amounts of
timer ticks (I had it lose 20% for a short stretch) when under intense
mostly disk I/O load. I suspect it has to do with dcache pruning, but
I don't know.

-hpa

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