Hi Vince, On Thu May 10 2007 1:53 pm, Vince Weaver wrote: > I've been using perfmon2 to calculate CPI for various programs. This is > fine on Pentium III, Itanium, and Core machines because both a CYCLES and > a RETIRED_INSTRUCTIONS performance counter is available. > > However, on Pentium 4 there is no CYCLES counter. My question is, can I > use the "unique timestamp" field in the results to somehow get cycle > count? From what I can tell this is based on the TSC, which I guess can > cause problems on SMP machines if the TSCs aren't synchronized.
If memory serves correctly, the "global-power-events" event on Pentium4 is equivalent to clock-cycles (at least, when the processor is not stopped). Give that one a try and see if the results look reasonable. Thanks, -- Kevin Corry [EMAIL PROTECTED] http://www.ibm.com/linux/ _______________________________________________ perfmon mailing list [email protected] http://www.hpl.hp.com/hosted/linux/mail-archives/perfmon/
