From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f51.google.com (mail-pb0-f51.google.com [209.85.160.51]) by kanga.kvack.org (Postfix) with ESMTP id 088836B0082 for ; Fri, 6 Dec 2013 12:44:42 -0500 (EST) Received: by mail-pb0-f51.google.com with SMTP id up15so1475096pbc.10 for ; Fri, 06 Dec 2013 09:44:42 -0800 (PST) Received: from mga02.intel.com (mga02.intel.com. [134.134.136.20]) by mx.google.com with ESMTP id iz5si42268360pbd.242.2013.12.06.09.44.41 for ; Fri, 06 Dec 2013 09:44:41 -0800 (PST) Message-ID: <52A20CA9.2040303@intel.com> Date: Fri, 06 Dec 2013 09:43:05 -0800 From: Dave Hansen MIME-Version: 1.0 Subject: Re: NUMA? bisected performance regression 3.11->3.12 References: <528E8FCE.1000707@intel.com> <20131126103223.GG5285@suse.de> In-Reply-To: <20131126103223.GG5285@suse.de> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman Cc: Johannes Weiner , Linus Torvalds , Linux-MM , Rik van Riel , Kevin Hilman , Andrea Arcangeli , Paul Bolle , Zlatko Calusic , Andrew Morton , Tim Chen , Andi Kleen , Vlastimil Babka On 11/26/2013 02:32 AM, Mel Gorman wrote: > On Thu, Nov 21, 2013 at 02:57:18PM -0800, Dave Hansen wrote: >> I'm running an open/close microbenchmark from the will-it-scale set: >>> https://github.com/antonblanchard/will-it-scale/blob/master/tests/open1.c >> >> I was seeing some weird symptoms on 3.12 vs 3.11. The throughput in >> that test was going from down from 50 million to 35 million. >> >> The profiles show an increase in cpu time in _raw_spin_lock_irq. The >> profiles pointed to slub code that hasn't been touched in quite a while. >> I bisected it down to: > > Dave, do you mind retesting this against "[RFC PATCH 0/5] Memory compaction > efficiency improvements" please? I have not finished reviewing the series > yet but patch 3 mentions lower allocation success rates with Johannes' > patch and notes that it is unlikely to be a bug with the patch itself. Sorry for the delay. I lost monster box for a few days... That series didn't look to have much of an effect. Before/after numbers coming out of that open1 test were both ~35M. If it helped, it was in the noise. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org