Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753990AbaAFLI0 (ORCPT ); Mon, 6 Jan 2014 06:08:26 -0500 Received: from merlin.infradead.org ([205.233.59.134]:56120 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752857AbaAFLIY (ORCPT ); Mon, 6 Jan 2014 06:08:24 -0500 Date: Mon, 6 Jan 2014 12:08:03 +0100 From: Peter Zijlstra To: Peter P Waskiewicz Jr Cc: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Tejun Heo , Li Zefan , containers@lists.linux-foundation.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/4] x86: Add Cache QoS Monitoring (CQM) support Message-ID: <20140106110803.GA5623@twins.programming.kicks-ass.net> References: <1388781285-18067-1-git-send-email-peter.p.waskiewicz.jr@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1388781285-18067-1-git-send-email-peter.p.waskiewicz.jr@intel.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jan 03, 2014 at 12:34:41PM -0800, Peter P Waskiewicz Jr wrote: > The CPU features themselves are relatively straight-forward, but > the presentation of the data is less straight-forward. Since this > tracks cache usage and occupancy per process (by swapping Resource > Monitor IDs, or RMIDs, when processes are rescheduled), perf would > not be a good fit for this data, which does not report on a > per-process level. Therefore, a new cgroup subsystem, cacheqos, has > been added. This operates very similarly to the cpu and cpuacct > cgroup subsystems, where tasks can be grouped into sub-leaves of the > root-level cgroup. This doesn't make any sense.. From a quick SDM read you can do pretty much whatever with those RMIDs. If you allocate a RMID per task (thread in userspace) you can actually measure things on a task basis. >From then on you can use perf-cgroup to group whatever tasks you want. So please be more explicit in why you think this doesn't fit into perf. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/