Re: [patch] x86: unify/rewrite SMP TSC sync code

[Wink Saville]

Robert Hancock wrote:
> > > > Actually, we need to ask the CPU/System makers to provide a system wide
> Generally user mode code should just be using gettimeofday. When the TSC 
> is usable as a sane time source, the kernel will use it. When it's not, 
> it will use something else like the HPET, ACPI PM Timer or (at last 
> resort) the PIT, in increasing degrees of slowness.

But gettimeofday is much too expensive compared to RDTSC.

Wink

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