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[209.132.180.67]) by mx.google.com with ESMTP id g11si2640325pgs.153.2018.04.04.14.17.49; Wed, 04 Apr 2018 14:18:03 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752205AbeDDVQh (ORCPT + 99 others); Wed, 4 Apr 2018 17:16:37 -0400 Received: from mga03.intel.com ([134.134.136.65]:27654 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751749AbeDDVQg (ORCPT ); Wed, 4 Apr 2018 17:16:36 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 04 Apr 2018 14:16:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.48,408,1517904000"; d="scan'208";a="43499258" Received: from megha-z97x-ud7-th.sc.intel.com (HELO [143.183.85.162]) ([143.183.85.162]) by fmsmga004.fm.intel.com with ESMTP; 04 Apr 2018 14:16:34 -0700 Message-ID: <1522877605.3367.2.camel@megha-Z97X-UD7-TH> Subject: Re: [PATCH V2 2/3] perf/x86/intel/bm.c: Add Intel Branch Monitoring support From: Megha Dey To: Peter Zijlstra Cc: x86@kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, andriy.shevchenko@linux.intel.com, kstewart@linuxfoundation.org, yu-cheng.yu@intel.com, len.brown@intel.com, gregkh@linuxfoundation.org, acme@kernel.org, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, vikas.shivappa@linux.intel.com, pombredanne@nexb.com, me@kylehuey.com, bp@suse.de, grzegorz.andrejczuk@intel.com, tony.luck@intel.com, corbet@lwn.net, ravi.v.shankar@intel.com, Mark Rutland Date: Wed, 04 Apr 2018 14:33:25 -0700 In-Reply-To: <1513805032.31684.2.camel@megha-Z97X-UD7-TH> References: <1510970046-25387-1-git-send-email-megha.dey@linux.intel.com> <1510970046-25387-3-git-send-email-megha.dey@linux.intel.com> <20171120115714.hden247iet4bf2t5@hirez.programming.kicks-ass.net> <1513113057.11361.7.camel@megha-Z97X-UD7-TH> <20171212223253.wtvei7i6fz2h3dpn@hirez.programming.kicks-ass.net> <1513120080.11361.12.camel@megha-Z97X-UD7-TH> <20171213072146.7zbledeffvwskxx6@hirez.programming.kicks-ass.net> <1513805032.31684.2.camel@megha-Z97X-UD7-TH> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2017-12-20 at 13:23 -0800, Megha Dey wrote: > On Wed, 2017-12-13 at 08:21 +0100, Peter Zijlstra wrote: > > On Tue, Dec 12, 2017 at 03:08:00PM -0800, Megha Dey wrote: > > > > > > > > There's work on the way to allow multiple HW PMUs. You'll either have to > > > > wait for that or help in making that happen. What you do not do is > > > > silently hack around it. > > > > > > Could I get a pointer to the code implementing this? > > > > > > > There isn't much code now; but it could be build on top of the stuff > > here: > > > > git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git perf/core > > > > It was mostly Mark I think who wanted this for big litte stuffs. > > Could you give us an estimate on the amount of time it could take to > implement this? > > I am not sure what the current status is or if Mark has been working on > it. > Hi Peter, Is there anyone currently working on this?