From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with ESMTP id C4F8362001F for ; Wed, 17 Mar 2010 14:53:43 -0400 (EDT) Received: from d28relay01.in.ibm.com (d28relay01.in.ibm.com [9.184.220.58]) by e28smtp06.in.ibm.com (8.14.3/8.13.1) with ESMTP id o2HIrXkL015369 for ; Thu, 18 Mar 2010 00:23:33 +0530 Received: from d28av05.in.ibm.com (d28av05.in.ibm.com [9.184.220.67]) by d28relay01.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o2HIrXpO2805934 for ; Thu, 18 Mar 2010 00:23:33 +0530 Received: from d28av05.in.ibm.com (loopback [127.0.0.1]) by d28av05.in.ibm.com (8.14.3/8.13.1/NCO v10.0 AVout) with ESMTP id o2HIrW2Y026926 for ; Thu, 18 Mar 2010 05:53:33 +1100 Date: Thu, 18 Mar 2010 00:23:27 +0530 From: Balbir Singh Subject: Re: [PATCH -mmotm 0/5] memcg: per cgroup dirty limit (v7) Message-ID: <20100317185327.GV18054@balbir.in.ibm.com> Reply-To: balbir@linux.vnet.ibm.com References: <1268609202-15581-1-git-send-email-arighi@develer.com> <20100315171209.GI21127@redhat.com> <20100315171921.GJ21127@redhat.com> <20100317115427.GR18054@balbir.in.ibm.com> <20100317133407.GA9198@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <20100317133407.GA9198@redhat.com> Sender: owner-linux-mm@kvack.org To: Vivek Goyal Cc: Andrea Righi , KAMEZAWA Hiroyuki , Daisuke Nishimura , Peter Zijlstra , Trond Myklebust , Suleiman Souhlal , Greg Thelen , "Kirill A. Shutemov" , Andrew Morton , containers@lists.linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: * Vivek Goyal [2010-03-17 09:34:07]: > > > > > > root cgroup > > > ========== > > > #time dd if=/dev/zero of=/root/zerofile bs=4K count=1M > > > 4294967296 bytes (4.3 GB) copied, 56.098 s, 76.6 MB/s > > > > > > real 0m56.614s > > > > > > test1 cgroup with memory limit 100M > > > =================================== > > > # time dd if=/dev/zero of=/root/zerofile1 bs=4K count=1M > > > 4294967296 bytes (4.3 GB) copied, 19.8097 s, 217 MB/s > > > > > > real 0m19.992s > > > > > > > This is strange, did you flish the cache between the two runs? > > NOTE: Since the files are same, we reuse page cache from the > > other cgroup. > > Files are different. Note suffix "1". > Thanks, I'll get the perf output and see what I get. -- Three Cheers, Balbir -- 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