Re: tlug: Timing in Linux and 686 Cache

["Manuel M. T. Chakravarty" <chak@example.com>]

> On Sat, Jul 18, 1998 at 06:30:23PM +0900, Manuel Chakravarty wrote:
> > * Does anybody have an idea whether it is possible in Linux to time the
> >   execution of user-level code below a resolution of 10ms?  Using the function
> >   `getrusage', a resolution of 10ms is the best that I can get.  Is there
> >   anything better?
> 
> On Pentiums and above, you can use the RDTSC instruction to get a 64bit
> count of the number of clock cycles the processor has seen.
> 
> http://developer.intel.com/drg/pentiumII/appnotes/RDTSCPM1.HTM

That looks good.  Thank you!

Manuel

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