From: Dave Hansen <dave.hansen@intel.com>
To: Nathan Zimmer <nzimmer@sgi.com>
Cc: Ingo Molnar <mingo@kernel.org>,
holt@sgi.com, travis@sgi.com, rob@landley.net,
tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
yinghai@kernel.org, akpm@linux-foundation.org,
gregkh@linuxfoundation.org, x86@kernel.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [RFC 2/2] x86_64, mm: Reinsert the absent memory
Date: Wed, 26 Jun 2013 08:12:07 -0700 [thread overview]
Message-ID: <51CB04C7.8060702@intel.com> (raw)
In-Reply-To: <20130626144903.GA2210@asylum.americas.sgi.com>
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. :)
next prev parent reply other threads:[~2013-06-26 15:12 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-21 16:25 [RFC 0/2] Delay initializing of large sections of memory Nathan Zimmer
2013-06-21 16:25 ` [RFC 1/2] x86_64, mm: Delay initializing large portion " Nathan Zimmer
2013-06-25 4:14 ` Rob Landley
2013-06-21 16:25 ` [RFC 2/2] x86_64, mm: Reinsert the absent memory Nathan Zimmer
2013-06-23 9:28 ` Ingo Molnar
2013-06-23 9:32 ` Ingo Molnar
2013-06-24 17:38 ` H. Peter Anvin
2013-06-24 19:39 ` Ingo Molnar
2013-06-24 20:08 ` H. Peter Anvin
2013-06-25 7:31 ` Ingo Molnar
2013-06-24 20:36 ` Nathan Zimmer
2013-06-25 7:38 ` Ingo Molnar
2013-06-25 15:07 ` H. Peter Anvin
2013-06-25 17:19 ` Mike Travis
2013-06-25 17:22 ` Mike Travis
2013-06-25 18:43 ` H. Peter Anvin
2013-06-25 18:51 ` Mike Travis
2013-06-26 9:22 ` [RFC] Transparent on-demand memory setup initialization embedded in the (GFP) buddy allocator Ingo Molnar
2013-06-26 13:28 ` Andrew Morton
2013-06-26 13:37 ` Ingo Molnar
2013-06-26 15:02 ` Nathan Zimmer
2013-06-26 16:15 ` Mike Travis
2013-06-26 12:14 ` [RFC 2/2] x86_64, mm: Reinsert the absent memory Ingo Molnar
2013-06-26 14:49 ` Nathan Zimmer
2013-06-26 15:12 ` Dave Hansen [this message]
2013-06-26 15:20 ` Nathan Zimmer
2013-06-26 15:58 ` Ingo Molnar
2013-06-26 16:11 ` Nathan Zimmer
2013-06-26 16:07 ` Mike Travis
2013-06-21 16:51 ` [RFC 0/2] Delay initializing of large sections of memory Greg KH
2013-06-21 17:03 ` H. Peter Anvin
2013-06-21 17:18 ` Nathan Zimmer
2013-06-21 17:28 ` H. Peter Anvin
2013-06-21 20:05 ` Nathan Zimmer
2013-06-21 20:08 ` H. Peter Anvin
2013-06-21 20:33 ` Nathan Zimmer
2013-06-21 21:36 ` Mike Travis
2013-06-21 21:07 ` Mike Travis
2013-06-21 18:44 ` Yinghai Lu
2013-06-21 18:50 ` Greg KH
2013-06-21 19:10 ` Yinghai Lu
2013-06-21 19:19 ` Nathan Zimmer
2013-06-21 20:28 ` Yinghai Lu
2013-06-21 20:40 ` Nathan Zimmer
2013-06-21 21:30 ` Mike Travis
2013-06-22 0:23 ` Yinghai Lu
2013-06-25 17:35 ` Mike Travis
2013-06-25 18:17 ` H. Peter Anvin
2013-06-25 18:40 ` Mike Travis
2013-06-25 18:40 ` Yinghai Lu
2013-06-25 18:44 ` H. Peter Anvin
2013-06-25 18:58 ` Mike Travis
2013-06-25 19:03 ` Yinghai Lu
2013-06-25 19:09 ` H. Peter Anvin
2013-06-25 19:28 ` Yinghai Lu
2013-06-27 6:37 ` Yinghai Lu
2013-06-27 11:05 ` Robin Holt
2013-06-27 15:50 ` Mike Travis
2013-06-26 9:23 ` Ingo Molnar
2013-06-25 18:38 ` Yinghai Lu
2013-06-25 18:42 ` Mike Travis
2013-06-21 18:36 ` Yinghai Lu
2013-06-21 18:44 ` Greg Kroah-Hartman
2013-06-21 19:00 ` Yinghai Lu
2013-06-21 21:28 ` Mike Travis
2013-06-21 21:19 ` Mike Travis
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