http://bugs.winehq.com/show_bug.cgi?id=1667
------- Additional Comments From Andrew.Talbot@talbotville.com 2003-13-12 15:38 ------- Mike,
There seems to be at least a third source for high-performance timers: the ACPI Power Management Timer, which clocks away at 3.579545 MHz! (See http://lkml.org/lkml/2003/11/17/138.)
I suspect that systems with a QPF of 1.193180 MHz (e.g. Win98SE) might use PIT channel 2, whereas those with a QPF of 3.579545 MHz possibly use the ACPI PM Timer.
Linux source file /usr/src/linux/arch/i386/kernel/time.c is an interesting read. I think the next step might be to post a query to a Linux kernel Usenet group, to verify/disprove these assertions.
-- Andy.