Thanks for the suggestions. I'll look into it, but I don't think perfctr is P4 compatible yet. - Hai On Sat, 9 Nov 2002, John Levon wrote: > On Fri, Nov 08, 2002 at 04:47:53PM -0500, Hai Huang wrote: > > > performance counters is the same as msrs. It's the same as when you are > > doing an rdtsc, you're really just reading a msr. However, the msr > > description written in system developer's manual v3 is so convoluted, I'm > > having a hard time trying to understand which cccr, escr msrs need to > > be set in order to count the number of memory accesses. Maybe this isn't > > the right place to ask... Oh well, thanks anyway. > > Read some code that handles them, eg. vtune, perfctr, oprofile > > regards > john > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/