* Nathan Zimmer <nzimmer@xxxxxxx> wrote: > On 06/26/2013 10:12 AM, Dave Hansen wrote: > >On 06/26/2013 07:49 AM, Nathan Zimmer wrote: > >>My guess it is the NMIs overwhelming the system but I have not found a good way > >>to profile perf gone wild so it is only a guess. > >I've got an 80-core system and the symptoms sound similar to perf issues > >I'm seeing. Dropping the sample rate helped for me, and there's a patch > >in -tip at the moment to do it automatically: > > > >>http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=14c63f17b1fde5a575a28e96547a22b451c71fb5 > >Looks like you've also found that debugging NMIs is fun. :) > More fun then one person can handle. > I'll have to take this patch for a spin. Please try latest -tip:master, there's a series of patches from Dave that address this problem category. Does it only happen with -g, or with regular perf record and/or with perf top as well? Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
