Messages in this thread | | | Date | Wed, 26 Jun 2013 10:20:29 -0500 | From | Nathan Zimmer <> | Subject | Re: [RFC 2/2] x86_64, mm: Reinsert the absent memory |
| |
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.
Thanks, Nate
| |