Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753606AbaBZT0F (ORCPT ); Wed, 26 Feb 2014 14:26:05 -0500 Received: from mail-ve0-f174.google.com ([209.85.128.174]:44312 "EHLO mail-ve0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753198AbaBZT0D (ORCPT ); Wed, 26 Feb 2014 14:26:03 -0500 MIME-Version: 1.0 In-Reply-To: <530E3E47.8010205@gmail.com> References: <1392703661-15104-1-git-send-email-zheng.z.yan@intel.com> <530D53EF.9090706@amacapital.net> <20140226185513.GL22728@two.firstfloor.org> <530E3E47.8010205@gmail.com> From: Andy Lutomirski Date: Wed, 26 Feb 2014 11:25:41 -0800 Message-ID: Subject: Re: [PATCH v3 00/14] perf, x86: Haswell LBR call stack support To: David Ahern Cc: Andi Kleen , Stephane Eranian , "Yan, Zheng" , LKML , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Feb 26, 2014 at 11:19 AM, David Ahern wrote: > On 2/26/14, 11:59 AM, Andy Lutomirski wrote: > >> I wonder if anyone who uses perf for userspace profiling *ever* uses >> FP and gets away with it. There's precious little userspace software >> compiled with frame pointers these days on most architectures. > > > yes and yes. With control over the entire stack we are making sure > frame-pointers are enabled as much as possible. > I'm curious why. Maybe this should be a config option. Anyone using a standard distro is running a nearly completely frame-pointer-omitted userspace these days. --Andy > -- Andy Lutomirski AMA Capital Management, LLC -- 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/