If I can add just a little more to this: it has been our experience that you get the best operation from perf_events in kernel 2.6.33+ (as Stephane recommends). Some distros have not yet gotten up to that version yet. PAPI now supports perf_events, so you should be good to go with that. All this stuff is still shaking out, but good work has been done which we all appreciate.
Rick ----- Original Message ----- From: perfmon2-devel-requ...@lists.sourceforge.net To: perfmon2-devel@lists.sourceforge.net Sent: Wednesday, June 23, 2010 2:13:00 PM Subject: perfmon2-devel Digest, Vol 32, Issue 9 Message: 6 Date: Wed, 23 Jun 2010 15:11:03 +0200 From: stephane eranian <eran...@googlemail.com> Subject: Re: [perfmon2] difference between kinds of perf-tools To: lulu he <lolos...@gmail.com> Cc: perfmon2-devel@lists.sourceforge.net Message-ID: <aanlktilkzxfalt8lg-hq2j_dunyvnm31oenrrycha...@mail.gmail.com> Content-Type: text/plain; charset=UTF-8 Hi, On Mon, Jun 21, 2010 at 9:55 AM, lulu he <lolos...@gmail.com> wrote: > Hi, > > I wanna collect statistics of paralle applications every 10M > instructions or 100M. > > I know serveral tools may do this, > ie. oprofile, pfmon, PAPI, VTune. > > My question is this , I am not really sure what the above 4 tools > share in common? > A common kernel interface? OR a common library? > As far as I know, pfmon needs perfmon2 kernel patch, PAPI needs > perfctr kernel patch? > They do not share must in common, though PAPI can work on top of perfctr or perfmon and soon perf_events. The perf_events interface is now the official kernel API to access the performance counters. So I advise you to use this API and tools. You need a kernel >= 2.6.31. I recommend using 2.6.34. As for the tool, it is called perf. It comes from the kernel sources. Some distros may already provide a package for it, otherwise compile it from the kernel source tree in tools/perf. The perf tool can collect profiles. You can chose the event and the sampling period. This is what you need. > And which library(libpfmon,or?) should I use for collecting statistics > every 10M instructions? > > Thanks. > > ------------------------------------------------------------------------------ > ThinkGeek and WIRED's GeekDad team up for the Ultimate > GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the > lucky parental unit. ?See the prize list and enter to win: > http://p.sf.net/sfu/thinkgeek-promo > _______________________________________________ perfmon2-devel mailing > list perfmon2-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/perfmon2-devel > perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel End of perfmon2-devel Digest, Vol 32, Issue 9 ********************************************* ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ perfmon2-devel mailing list perfmon2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
