From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754648Ab1K1UEO (ORCPT ); Mon, 28 Nov 2011 15:04:14 -0500 Received: from merlin.infradead.org ([205.233.59.134]:34980 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752056Ab1K1UEN convert rfc822-to-8bit (ORCPT ); Mon, 28 Nov 2011 15:04:13 -0500 Message-ID: <1322510636.2921.168.camel@twins> Subject: Re: [PATCH 7/9] ftrace, perf: Add support to use function tracepoint in perf From: Peter Zijlstra To: Steven Rostedt Cc: Jiri Olsa , fweisbec@gmail.com, mingo@redhat.com, paulus@samba.org, acme@ghostprotocols.net, linux-kernel@vger.kernel.org Date: Mon, 28 Nov 2011 21:03:56 +0100 In-Reply-To: <1322510318.17003.14.camel@frodo> References: <1322417074-5834-1-git-send-email-jolsa@redhat.com> <1322417074-5834-8-git-send-email-jolsa@redhat.com> <1322510318.17003.14.camel@frodo> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-Mailer: Evolution 3.2.1- Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2011-11-28 at 14:58 -0500, Steven Rostedt wrote: > > perf stat -e ftrace:function ls > > Question. This is a root only command, correct? Otherwise, we are > allowing any user to create a large performance impact to the system. Typically not, although I haven't looked at Jiri's implementation of the function tracepoint.