Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751177AbaBZHEE (ORCPT ); Wed, 26 Feb 2014 02:04:04 -0500 Received: from mail-ob0-f172.google.com ([209.85.214.172]:49961 "EHLO mail-ob0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750842AbaBZHEC (ORCPT ); Wed, 26 Feb 2014 02:04:02 -0500 MIME-Version: 1.0 In-Reply-To: <530D53EF.9090706@amacapital.net> References: <1392703661-15104-1-git-send-email-zheng.z.yan@intel.com> <530D53EF.9090706@amacapital.net> Date: Wed, 26 Feb 2014 08:04:00 +0100 Message-ID: Subject: Re: [PATCH v3 00/14] perf, x86: Haswell LBR call stack support From: Stephane Eranian To: Andy Lutomirski Cc: "Yan, Zheng" , LKML , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Andi Kleen Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Feb 26, 2014 at 3:39 AM, Andy Lutomirski wrote: > 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. > That would mean you'd be root for perf. Or are you suggesting a perf event option? But then, you'd expose arch-specific feature at the API level. > --Andy -- 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/