From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54336) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZpBon-0006Yy-Fp for qemu-devel@nongnu.org; Thu, 22 Oct 2015 05:05:54 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZpBoj-0001a9-82 for qemu-devel@nongnu.org; Thu, 22 Oct 2015 05:05:53 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:59940) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZpBoi-0001ZM-Db for qemu-devel@nongnu.org; Thu, 22 Oct 2015 05:05:49 -0400 References: <1441182199-8328-1-git-send-email-zhang.zhanghailiang@huawei.com> <20151021141014.GA2478@work-vm> From: zhanghailiang Message-ID: <5628A5E3.3010501@huawei.com> Date: Thu, 22 Oct 2015 17:01:23 +0800 MIME-Version: 1.0 In-Reply-To: <20151021141014.GA2478@work-vm> Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit 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: "Dr. David Alan Gilbert" 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 Dave, Thanks for feedback, i have recorded this problem, maybe we can optimize this calling in the future. Thanks, zhanghailiang On 2015/10/21 22:10, Dr. David Alan Gilbert wrote: > 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 > > . >