From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932198AbWF2TPo (ORCPT ); Thu, 29 Jun 2006 15:15:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932252AbWF2TPo (ORCPT ); Thu, 29 Jun 2006 15:15:44 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:30655 "EHLO e3.ny.us.ibm.com") by vger.kernel.org with ESMTP id S932198AbWF2TPn (ORCPT ); Thu, 29 Jun 2006 15:15:43 -0400 Message-ID: <44A426DC.9090009@watson.ibm.com> Date: Thu, 29 Jun 2006 15:15:40 -0400 From: Shailabh Nagar User-Agent: Mozilla Thunderbird 1.0.7 (Windows/20050923) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Paul Jackson CC: Andrew Morton , Valdis.Kletnieks@vt.edu, jlan@engr.sgi.com, balbir@in.ibm.com, csturtiv@sgi.com, linux-kernel@vger.kernel.org Subject: Re: [Patch][RFC] Disabling per-tgid stats on task exit in taskstats References: <44892610.6040001@watson.ibm.com> <4489EE7C.3080007@watson.ibm.com> <449999D1.7000403@engr.sgi.com> <44999A98.8030406@engr.sgi.com> <44999F5A.2080809@watson.ibm.com> <4499D7CD.1020303@engr.sgi.com> <449C2181.6000007@watson.ibm.com> <20060623141926.b28a5fc0.akpm@osdl.org> <449C6620.1020203@engr.sgi.com> <20060623164743.c894c314.akpm@osdl.org> <449CAA78.4080902@watson.ibm.com> <20060623213912.96056b02.akpm@osdl.org> <449CD4B3.8020300@watson.ibm.com> <44A01A50.1050403@sgi.com> <20060626105548.edef4c64.akpm@osdl.org> <44A020CD.30903@watson.ibm.com> <20060626111249.7aece36e.akpm@osdl.org> <44A026ED.8080903@sgi.com> <20060626113959.839d72bc.akpm@osdl.org> <44A2F50D.8030306@engr.sgi.com> <20060628145341.529a61ab.akpm@osdl.org> <44A2FC72.9090407@engr.sgi.com> <20060629014050.d3bf0be4.pj@sgi.com> <200606291230.k5TCUg45030710@turing-police.cc.vt.edu> <20060629094408.360ac157.pj@sgi.com> <20060629110107.2e56310b.akpm@osdl.org> <20060629112642.66f35dd5.pj@sgi.com> In-Reply-To: <20060629112642.66f35dd5.pj@sgi.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Paul Jackson wrote: >Andrew wrote: > > >>a) throw more CPU(s) at stats collection: allow userspace to register for >> "stats generated by CPU N", then run a stats collection daemon on each >> CPU or >> >> > >I wonder if we could make the collector per-cpuset. > > I suppose this is because cpuset's offer some middle ground between collecting data per-cpu vs. collecting it for all cpus ? What happens when someone is using cpusets on such a machine and changes its membership in response to other needs. All taskstats users would need to monitor for such changes and adjust their processing....seems like unnecessary tying up of two unrelated concepts. --Shailabh