I clearly remembered it: "RDTSC varies it’s counter as the system speed
changes when Intel SpeedStep"
From Intel's own site...
Alain
Adrian Sietsma escreveu:
as exprimentally verified by David Burgess, the intel RDTSC instruction
is affected by processor clock throttling ie. power saving modes.
there is more here :
http://www.intel.com/cd/ids/developer/asmo-na/eng/148279.htm?prn=Y
Adrian
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