Re: [PATCH] All Transmeta CPUs have constant TSCs

[H. Peter Anvin]

dean gaudet wrote:
> On Mon, 8 Jan 2007, H. Peter Anvin wrote:
>
> > I *definitely* support the concept that RDPMC 0 should could CPU cycles by
> > convention in Linux.
>
> unfortunately that'd be very limiting and annoying on core2 processors 
> which have dedicated perf counters for clocks unhalted (actual vs. 
> nominal), but only 2 configurable perf counters.  i forget what ecx value 
> gets you the dedicated counters... but a solution which might work would 
> be a syscall to return the perf counter number...
>
> or we could just merge perfmon ;)

OK, if there are dedicated counters in hardware at a different number, 
we probably should make it an ELF entry value (no need to make it a 
syscall for a constant.)

	-hpa
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