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From: sebastien cabaniols on 17 Sep 2009 08:30 Hello list, I am interested by monitoring instructions versus cycles with a Nehalem box using 2.6.31 with PCL. Is there a way with perf report to display both counters ? I used perf record -e cycles -e instructions -a for the recording session. perf report -n seems to be doing what I need but for only one counter. Is this a limitation of perf report ? Is this an architectural limitation of PCL ? Is there more documentation than what is in the perf directory in the 2.6.31 tarball ? -- Sébastien Cabaniols SCI Presales EMEA HP current timezone = UTC+2 (localtime is approx. 14:20) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Ingo Molnar on 19 Sep 2009 04:10
* sebastien cabaniols <sebastien.cabaniols(a)hp.com> wrote: > Hello list, > > I am interested by monitoring instructions versus cycles with a Nehalem box > using 2.6.31 with PCL. > > Is there a way with perf report to display both counters ? > > I used > > perf record -e cycles -e instructions -a for the recording session. > > perf report -n seems to be doing what I need but for only one counter. > > Is this a limitation of perf report ? > Is this an architectural limitation of PCL ? > Is there more documentation than what is in the perf directory in the 2.6.31 > tarball ? You can find a description and a tutorial here: http://lwn.net/Articles/339361/ There's also http://perf.wiki.kernel.org. Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |