Subject: Re: Wierd time-keeping with i386 MP kernel
To: Jaromir Dolecek <jdolecek@NetBSD.org>
From: Bill Sommerfeld <email@example.com>
Date: 02/03/2002 15:09:55
> Not with dual PIII 733Mhz (MSI-694D Pro2 motherboard IIRC).
> BTW, from the dmesg you provided, this seems strange:
> cpu0: calibrating local timer
> cpu0: apic clock running at 327 MHz
> APIC running at 327Mhz?? Mine uses 133Mhz, Martin's 100Mhz.
(should have read the whole thread before replying the first time).
As is suggested by the Intel MP spec, this is computed by calibrating
the local apic clock vs. the traditional PC i8254 counter-timer, done
in lapic_calibrate_timer() in arch/i386/i386/lapic.c