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SubjectRe: [PATCH] All Transmeta CPUs have constant TSCs
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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