Re: [SMP patch] io-apic-patch-2.1.97-A

MOLNAR Ingo (mingo@chiara.csoma.elte.hu)
Mon, 20 Apr 1998 02:36:16 +0200 (CEST)


On Sun, 19 Apr 1998, Qiru Zhou wrote:

> > CPU0: Intel Pentium 75+ stepping 0b
> > Calibrating APIC timer
> > ...... CPU Clock speed is 133.3200 Mhz
> > ...... APIC bus clock speed is 533.3113 Mhz.
>
> How could you get APIC bus clock to be 500Mhz+? As I understand,it
> should be the same as your bus speed. I am not sure on it for a Pentium
> SMP system. But the PPro and P II SMPs give the right bus speed (66 Mhz
> or so)

yes it's definitely wrong, although the number itself makes sense (8*66).
It would be nice to see a full bootlog from such a system, with SMP_DEBUG
enabled in arch/i386/kernel/smp.c.

-- mingo

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