Re: x86 MSRs - example program

Philippe Strauss (
Fri, 28 Feb 1997 16:23:14 +0100 (CET)

Reading some doco about RDTSC and RDMSR, I just learn that RDTSC is only
available in ring 0.. (At least Therje Matiesen wrote that in his Byte
article). I'm using RDTSC from user space since a while in a FFT
benchmarking software, i just wonder how it is possible ?

my software can be found here:

Needless to say that i own an intel pentium.

Philippe Strauss, Telecom engineer.
finger for PGP key

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