Re: [patch 11/19] i386: Rework local APIC calibration

[Ingo Molnar]

* Arjan van de Ven <arjan@xxxxxxxxxxxxx> wrote:

> On Thu, 2006-11-09 at 23:38 +0000, Thomas Gleixner wrote:
> > plain text document attachment (i386-lapic-calibrate-timer.patch)
> > From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> 
> One question: why do the irq measurement at all if pmtimer is 
> available?

the pmtimer read will always return zero on platforms where there's no 
pm-timer clock - in this case the irq measurement is what calibrates.

	Ingo
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