Re: x86 MSRs - example program
Alan Cox (alan@lxorguk.ukuu.org.uk)
Fri, 28 Feb 1997 23:22:36 +0000 (GMT)
> 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:
> ftp://sicel-home-1-4.urbanet.ch/pub/XSpectrum-1.1.tar.gz
>
> Needless to say that i own an intel pentium.
RDTSC access from user mode is controlled by one of the other magic
control registers. See www.x86.org