From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758216AbXHTNN0 (ORCPT ); Mon, 20 Aug 2007 09:13:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752712AbXHTNNR (ORCPT ); Mon, 20 Aug 2007 09:13:17 -0400 Received: from ecfrec.frec.bull.fr ([129.183.4.8]:39115 "EHLO ecfrec.frec.bull.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751658AbXHTNNR (ORCPT ); Mon, 20 Aug 2007 09:13:17 -0400 Message-ID: <46C99371.7070705@bull.net> Date: Mon, 20 Aug 2007 15:13:21 +0200 From: Laurent Vivier Organization: Bull S.A.S. User-Agent: Thunderbird 1.5.0.2 (X11/20060420) MIME-Version: 1.0 To: Ingo Molnar Cc: kvm-devel , linux-kernel , virtualization Subject: [PATCH 0/4] Virtual Machine Time Accounting X-Enigmail-Version: 0.94.0.0 X-MIMETrack: Itemize by SMTP Server on ECN002/FR/BULL(Release 5.0.12 |February 13, 2003) at 20/08/2007 15:18:28, Serialize by Router on ECN002/FR/BULL(Release 5.0.12 |February 13, 2003) at 20/08/2007 15:18:30, Serialize complete at 20/08/2007 15:18:30 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org The aim of these four patches is to introduce Virtual Machine time accounting. _Ingo_, as these patches modify files of the scheduler, could you have a look to them, please ? [PATCH 1/4] as recent CPUs introduce a third running state, after "user" and "system", we need a new field, "guest", in cpustat to store the time used by the CPU to run virtual CPU. Modify /proc/stat to display this new field. [PATCH 2/4] like for cpustat, introduce the "gtime" (guest time of the task) and "cgtime" (guest time of the task children) fields for the tasks. Modify signal_struct and task_struct. Modify /proc//stat to display these new fields. [PATCH 3/4] modify account_system_time() to add cputime to cpustat->guest if we are running a VCPU. We add this cputime to cpustat->user instead of cpustat->system because this part of KVM code is in fact user code although it is executed in the kernel. We duplicate VCPU time between guest and user to allow an unmodified "top(1)" to display correct value. A modified "top(1)" is able to display good cpu user time and cpu guest time by subtracting cpu guest time from cpu user time. Update "gtime" and "cgtime" in signal_struct and task_struct accordingly. [PATCH 4/4] Modify KVM to update guest time accounting. Signed-off-by: Laurent Vivier -- ------------- Laurent.Vivier@bull.net -------------- "Software is hard" - Donald Knuth