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RE: [Xen-devel] [PATCH] new hvm platform vhpet enable parameter


On Thu, 2008-02-07 at 11:29 -0700, Dan Magenheimer wrote:

> If Linux were using it as a timekeeping source, I think it would
> be (per earlier post by Dave Winchell), but on second look once
> HPET is disabled, Linux discovers pmtimer but still uses PIT/TSC
> based timekeeping.

Just one word of warning --- the Linux handling of PIT vs HPET vs
pmtimer has changed a lot over the years, and you might well find older
kernels handling these cases differently.  (I can't recall exact details
but I do remember seeing long discussions about the merits of the
different timers in different cases.)


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