From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx159.postini.com [74.125.245.159]) by kanga.kvack.org (Postfix) with SMTP id 1BB3F6B0034 for ; Tue, 30 Jul 2013 05:10:27 -0400 (EDT) Date: Tue, 30 Jul 2013 11:10:21 +0200 From: Peter Zijlstra Subject: Re: [RFC PATCH 00/10] Improve numa scheduling by consolidating tasks Message-ID: <20130730091021.GM3008@twins.programming.kicks-ass.net> References: <1375170505-5967-1-git-send-email-srikar@linux.vnet.ibm.com> <20130730081755.GF3008@twins.programming.kicks-ass.net> <20130730082001.GG3008@twins.programming.kicks-ass.net> <20130730090345.GA22201@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130730090345.GA22201@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Srikar Dronamraju Cc: Mel Gorman , Ingo Molnar , Andrea Arcangeli , Johannes Weiner , Linux-MM , LKML , Preeti U Murthy , Linus Torvalds On Tue, Jul 30, 2013 at 02:33:45PM +0530, Srikar Dronamraju wrote: > * Peter Zijlstra [2013-07-30 10:20:01]: > > > On Tue, Jul 30, 2013 at 10:17:55AM +0200, Peter Zijlstra wrote: > > > On Tue, Jul 30, 2013 at 01:18:15PM +0530, Srikar Dronamraju wrote: > > > > Here is an approach that looks to consolidate workloads across nodes. > > > > This results in much improved performance. Again I would assume this work > > > > is complementary to Mel's work with numa faulting. > > > > > > I highly dislike the use of task weights here. It seems completely > > > unrelated to the problem at hand. > > > > I also don't particularly like the fact that it's purely process based. > > The faults information we have gives much richer task relations. > > > > With just pure fault information based approach, I am not seeing any > major improvement in tasks/memory consolidation. I still see memory > spread across different nodes and tasks getting ping-ponged to different > nodes. And if there are multiple unrelated processes, then we see a mix > of tasks of different processes in each of the node. The fault thing isn't finished. Mel explicitly said it doesn't yet have inter-task relations. And you run everything in a VM which is like a big nasty mangler for anything sane. -- 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