On 07/13/2010 04:35 AM, Eduard Diner wrote: > Hi, > I want to compare performance on POWER6 and Xeon X5355. > > Basically I want to do the following with pfmon: > Over a long time periode I want to collect all available performance > counter for analysis system-wide. > > Are performance counter grouped? > > How can I do this for Xeon? > > Any best-practices?
There are a limited number of counters in the Power6 and I'm fairly certain the same is true for the Xeon chip. Each counter can count various events; it's not necessarily the case that all counters can count the same set of events, though there may be a lot of overlap. Therefore you need to choose a small (four or fewer for POWER6) set of events that you want to measure, and see if they can all fit on the available counters at once. You might be better off using an interface like PAPI, which allows you to choose a group of predefined events which have a reasonable likelihood of being supported on both POWER6 and Xeon X5355. Another possibility is to use the perf tool's generic hardware events, but that has a much smaller set of available events. - Corey ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
