Actual/operating CPU frequency (fwd)
Ronald G. Minnich
rminnich at lanl.gov
Wed Feb 23 05:38:00 CET 2005
An interesting question. AFAIK there is no general purpose way to get this
out of the CPU, am I wrong on this? I figure you have to at least talk to
the chipset and get some info ...
ron
---------- Forwarded message ----------
Date: Tue, 22 Feb 2005 16:29:40 -0700
From: Patrick McCormick <pat at lanl.gov>
To: Ronald G. Minnich <rminnich at lanl.gov>
Subject: Actual/operating CPU frequency
Hi Ron,
Would you happen to have any source around (assembly is fine) that will
return the actual clock speed that a processor (Intel and AMD) is running
at? I have the start of some code but I'm having a tough time getting the
details worked out. I know the BIOS has a 'ticker' with a known speed so I
could then use the time step counter to eventually get to the cpu
frequency but but I haven't found out exactly how to do this in several
attempts.
Any ideas? This code will eventually have to run under both Linux and Windows
(ugh).
Thanks,
--Pat
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