From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with SMTP id 8ECCD6B005D for ; Mon, 18 May 2009 06:12:32 -0400 (EDT) Received: from m1.gw.fujitsu.co.jp ([10.0.50.71]) by fgwmail7.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id n4IACf7C026950 for (envelope-from kamezawa.hiroyu@jp.fujitsu.com); Mon, 18 May 2009 19:12:41 +0900 Received: from smail (m1 [127.0.0.1]) by outgoing.m1.gw.fujitsu.co.jp (Postfix) with ESMTP id 5FF7145DD74 for ; Mon, 18 May 2009 19:12:41 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (s1.gw.fujitsu.co.jp [10.0.50.91]) by m1.gw.fujitsu.co.jp (Postfix) with ESMTP id 1294645DD7A for ; Mon, 18 May 2009 19:12:41 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id 36F351DB8017 for ; Mon, 18 May 2009 19:12:40 +0900 (JST) Received: from ml14.s.css.fujitsu.com (ml14.s.css.fujitsu.com [10.249.87.104]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id 4C248E0800E for ; Mon, 18 May 2009 19:12:39 +0900 (JST) Date: Mon, 18 May 2009 19:11:07 +0900 From: KAMEZAWA Hiroyuki Subject: Re: [RFC] Low overhead patches for the memory cgroup controller (v2) Message-Id: <20090518191107.8a7cc990.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20090515181639.GH4451@balbir.in.ibm.com> References: <20090515181639.GH4451@balbir.in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: balbir@linux.vnet.ibm.com Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Andrew Morton , "nishimura@mxp.nes.nec.co.jp" , "lizf@cn.fujitsu.com" , "menage@google.com" , KOSAKI Motohiro List-ID: On Fri, 15 May 2009 23:46:39 +0530 Balbir Singh wrote: > * KAMEZAWA Hiroyuki [2009-05-16 02:45:03]: > > > Balbir Singh wrote: > > > Feature: Remove the overhead associated with the root cgroup > > > > > > From: Balbir Singh > > > > > > This patch changes the memory cgroup and removes the overhead associated > > > with LRU maintenance of all pages in the root cgroup. As a side-effect, we > > > can > > > no longer set a memory hard limit in the root cgroup. > > > > > > A new flag is used to track page_cgroup associated with the root cgroup > > > pages. A new flag to track whether the page has been accounted or not > > > has been added as well. > > > > > > Review comments higly appreciated > > > > > > Tests > > > > > > 1. Tested with allocate, touch and limit test case for a non-root cgroup > > > 2. For the root cgroup tested performance impact with reaim > > > > > > > > > +patch mmtom-08-may-2009 > > > AIM9 1362.93 1338.17 > > > Dbase 17457.75 16021.58 > > > New Dbase 18070.18 16518.54 > > > Shared 9681.85 8882.11 > > > Compute 16197.79 15226.13 > > > > > Hmm, at first impression, I can't convice the numbers... > > Just avoiding list_add/del makes programs _10%_ faster ? > > Could you show changes in cpu cache-miss late if you can ? > > (And why Aim9 goes bad ?) > > OK... I'll try but I am away on travel for 3 weeks :( you can try and run > this as well > tested aim7 with some config. CPU: Xeon 3.1GHz/4Core x2 (8cpu) Memory: 32G HDD: Usual? Scsi disk (just 1 disk) (try_to_free_pages() etc...will never be called.) Multiuser config. #of tasks 1100 (near to peak on my host) 10runs. rc6mm1 score(Jobs/min) 44009.1 44844.5 44691.1 43981.9 44992.6 44544.9 44179.1 44283.0 44442.9 45033.8 average=44500 +patch 44656.8 44270.8 44706.7 44106.1 44467.6 44585.3 44167.0 44756.7 44853.9 44249.4 average=44482 Dbase config. #of tasks 25 rc6mm1 score (jobs/min) 11022.7 11018.9 11037.9 11003.8 11087.5 11145.2 11133.6 11068.3 11091.3 11106.6 average=11071 +patch 10888.0 10973.7 10913.9 11000.0 10984.9 10996.2 10969.9 10921.3 10921.3 11053.1 average=10962 Hmm, 1% improvement ? (I think this is reasonable score of the effect of this patch) Anyway, I'm afraid of difference between mine and your kernel config. plz enjoy your travel for now :) Thanks, -Kame -- 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