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SubjectRe: Timestamp counters on SMP
> > > Why would you want to use TSC in the user space? Coherent time and TSC
> >
> > for timing, of course, without the overhead of a syscall.
> Where do you need this? And how will your user space run on platforms
> without TSC?

ia32, sparc, pa-risc, alpha and probably mips and ppc all have
user-visible clock cycle counters. anyone interested in high-res
timing has been using them for years.

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