From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46436) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zou5z-0000mE-1m for qemu-devel@nongnu.org; Wed, 21 Oct 2015 10:10:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zou5u-0007eb-Bh for qemu-devel@nongnu.org; Wed, 21 Oct 2015 10:10:26 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39827) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zou5u-0007e2-5x for qemu-devel@nongnu.org; Wed, 21 Oct 2015 10:10:22 -0400 Date: Wed, 21 Oct 2015 15:10:15 +0100 From: "Dr. David Alan Gilbert" Message-ID: <20151021141014.GA2478@work-vm> References: <1441182199-8328-1-git-send-email-zhang.zhanghailiang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1441182199-8328-1-git-send-email-zhang.zhanghailiang@huawei.com> Subject: Re: [Qemu-devel] [PATCH COLO-Frame v9 00/32] COarse-grain LOck-stepping(COLO) Virtual Machines for Non-stop Service (FT) List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: zhanghailiang Cc: lizhijian@cn.fujitsu.com, quintela@redhat.com, yunhong.jiang@intel.com, eddie.dong@intel.com, peter.huangpeng@huawei.com, qemu-devel@nongnu.org, arei.gonglei@huawei.com, stefanha@redhat.com, amit.shah@redhat.com, yanghy@cn.fujitsu.com Hi, Not something I found on this set; but on your older set, where you have the experimental 'live' ram transfer; we found a test that was slowed down (5x) by the calls to 'colo_need_live_migrate_ram'; even if it decides not to send any RAM in the live phase, the call to 'qemu_savevm_state_pending' can be really expensive. Just thought it worth mentioning. Dave -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK