Messages in this thread | | | From | Len Brown <> | Subject | Re: CONFIG_NO_HZ: missed ticks, stall (keyb IRQ required) [2.6.18-rc4-mm1] | Date | Tue, 14 Nov 2006 01:34:20 -0500 |
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On Tuesday 07 November 2006 03:07, Ingo Molnar wrote: > > So given that C3 on every known system that has shipped to date breaks > > the LAPIC timer (and apparently this applies to C2 on these AMD > > boxes), dynticks needs a solid story for co-existing with C3. > > check out 2.6.19-rc4-mm2: it detects this breakage and works it around > by using the PIT as a clock-events source. That did the trick on my > laptop which has this problem too. I agree with you that degrading the > powersaving mode is not an option. > > we've got a question about HPET: it seems all recent hardware has it, > but the BIOS rarely mentions it, so the Linux driver does not enable > HPET. Is there any chance to enable HPET (in the chipset?) - this would > probably be a higher-quality clock-events source than the PIT.
If Windows enumerates and uses the HPET on a box, then Linux should be able to use the HPET on that box too.
I belive that Venki has looked at some of the HPET enumeration issues, and maybe he has some suggestions. Is there an example system on-hand where we know Windows works and Linux does not?
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