From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=36652 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PNpvR-0001jR-O3 for qemu-devel@nongnu.org; Wed, 01 Dec 2010 11:53:02 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PNpvQ-0003HT-3h for qemu-devel@nongnu.org; Wed, 01 Dec 2010 11:53:01 -0500 Received: from mx1.redhat.com ([209.132.183.28]:32188) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PNpvP-0003HJ-OU for qemu-devel@nongnu.org; Wed, 01 Dec 2010 11:53:00 -0500 Message-ID: <4CF67D65.8040408@redhat.com> Date: Wed, 01 Dec 2010 18:52:53 +0200 From: Avi Kivity MIME-Version: 1.0 References: <411b3f89b6b79b429686bd1b1fa188ba55b6c6f7.1290552026.git.quintela@redhat.com> <4CF45DE0.8020701@codemonkey.ws> <4CF65FBB.3020406@redhat.com> <4CF66FEB.7030602@codemonkey.ws> <4CF678E0.9070904@codemonkey.ws> <4CF67B19.9000308@redhat.com> <4CF67C9C.5000403@codemonkey.ws> In-Reply-To: <4CF67C9C.5000403@codemonkey.ws> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] Re: [PATCH 10/10] Maintaing number of dirty pages List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Anthony Liguori Cc: qemu-devel@nongnu.org, Juan Quintela On 12/01/2010 06:49 PM, Anthony Liguori wrote: >> We need actual measurements instead of speculations. > > > Yes, I agree 100%. I think the place to start is what I suggested in > a previous note in this thread, we need to measure actual stall time > in the guest. I'd actually start at the host. How much time does ioctl(KVM_GET_DIRTY_LOG) take? What's the percentage of time qemu_mutex is held? -- error compiling committee.c: too many arguments to function