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 ;)
-dean
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