From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752146Ab1ITR3q (ORCPT ); Tue, 20 Sep 2011 13:29:46 -0400 Received: from e38.co.us.ibm.com ([32.97.110.159]:37157 "EHLO e38.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751050Ab1ITR3p (ORCPT ); Tue, 20 Sep 2011 13:29:45 -0400 Date: Tue, 20 Sep 2011 22:59:30 +0530 From: Srivatsa Vaddagiri To: Peter Zijlstra Cc: Glauber Costa , linux-kernel@vger.kernel.org, xemul@parallels.com, paul@paulmenage.org, lizf@cn.fujitsu.com, daniel.lezcano@free.fr, mingo@elte.hu, jbottomley@parallels.com Subject: Re: [PATCH 1/9] Remove parent field in cpuacct cgroup Message-ID: <20110920172930.GA5318@linux.vnet.ibm.com> Reply-To: Srivatsa Vaddagiri References: <1316030695-19826-1-git-send-email-glommer@parallels.com> <1316030695-19826-2-git-send-email-glommer@parallels.com> <1316448186.1511.19.camel@twins> <4E776937.1070108@parallels.com> <1316449160.6091.5.camel@twins> <4E776E36.6040906@parallels.com> <1316450385.6091.9.camel@twins> <4E7770BD.6050902@parallels.com> <1316457653.6091.16.camel@twins> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <1316457653.6091.16.camel@twins> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Peter Zijlstra [2011-09-19 20:40:53]: > > Note I was talking about cpuusage. Well, in this case, I myself fail > > to see the value of the whole cpuusage thing... If I recall, cpuacct was prototyped by Paul Menage (and later modified by Balbir) as a way to demonstrate cgroup controller ..It was one of those "first" cgroups controllers written to demonstrate how cgroups worked. With regard to its value, it does provide a handy interface to measure cpu utilization of cgroups (vs having to manually sum up task's utilization) and afaik libvirt makes use of it (although I don't think anyone reads it at "high" frequency). http://www.redhat.com/archives/libvir-list/2011-April/msg00801.html > > Someone that sees > > further could maybe help us out here? (but this is sideways to the whole > > discussion we're having anyway) > > Would probably do to cc the cpuacct authors in this patch set ;-) I > think it came from IBM, so I added vatsa. - vatsa