From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752222AbaBZCjs (ORCPT ); Tue, 25 Feb 2014 21:39:48 -0500 Received: from mail-pb0-f49.google.com ([209.85.160.49]:38171 "EHLO mail-pb0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751579AbaBZCjq (ORCPT ); Tue, 25 Feb 2014 21:39:46 -0500 Message-ID: <530D53EF.9090706@amacapital.net> Date: Tue, 25 Feb 2014 18:39:43 -0800 From: Andy Lutomirski User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: "Yan, Zheng" , linux-kernel@vger.kernel.org CC: a.p.zijlstra@chello.nl, mingo@kernel.org, acme@infradead.org, eranian@google.com, andi@firstfloor.org Subject: Re: [PATCH v3 00/14] perf, x86: Haswell LBR call stack support References: <1392703661-15104-1-git-send-email-zheng.z.yan@intel.com> In-Reply-To: <1392703661-15104-1-git-send-email-zheng.z.yan@intel.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/17/2014 10:07 PM, Yan, Zheng wrote: > > This patch series adds LBR call stack support. User can enabled/disable > this through an sysfs attribute file in the CPU PMU directory: > echo 1 > /sys/bus/event_source/devices/cpu/lbr_callstack This seems like an unpleasant way to control this. It would be handy to be able to control this as an option to perf record. --Andy