From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53891) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eEr8q-0001mw-AY for qemu-devel@nongnu.org; Wed, 15 Nov 2017 01:25:45 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eEr8l-0004Aw-8H for qemu-devel@nongnu.org; Wed, 15 Nov 2017 01:25:44 -0500 Received: from mail.hust.edu.cn ([202.114.0.240]:65368 helo=hust.edu.cn) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eEr8k-0003wK-DW for qemu-devel@nongnu.org; Wed, 15 Nov 2017 01:25:39 -0500 From: "Chunguang Li" Date: Wed, 15 Nov 2017 14:24:37 +0800 Message-ID: <000001d35dda$6a1856b0$3e490410$@hust.edu.cn> MIME-Version: 1.0 Content-Language: zh-cn Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] Abnormal observation during migration: too many "write-not-dirty" pages List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: lichunguang@hust.edu.cn Cc: qemu-devel@nongnu.org, dgilbert@redhat.com, quintela@redhat.com, amit.shah@redhat.com, pbonzini@redhat.com, stefanha@redhat.com Some more details about this experiment: The host is running Ubuntu-16.04 with 4.4.0 Linux kernel and QEMU-2.5.1; The guest is running Ubuntu-12.04, except Memcached with Ubuntu-16.04. The exact numbers of the proportions of write-not-dirty pages for the first 2 pre-copy iterations: (0.445 means 44.5%) Memcached: 0.445, 0.478 Zeusmp: 0.670, 0.727 Mcf: 0.808, 0.793 Bzip2: 0.464, 0.447 Milc: 0.341, 0.037 cactusADM: 0.280, 0.248 lbm: 0.090, 0.037 GemsFDTD: 0.226, 0.172 Bwaves: 0.069, 0.003 Astar: 0.113, 0.039 Xalancbmk: 0.082, 0.041 Wrf: 0.141, 0.073 Any advice? Looking forward to any response. Thank you. Chunguang