From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755688AbaIKMn1 (ORCPT ); Thu, 11 Sep 2014 08:43:27 -0400 Received: from mail-la0-f42.google.com ([209.85.215.42]:58444 "EHLO mail-la0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755059AbaIKMnY (ORCPT ); Thu, 11 Sep 2014 08:43:24 -0400 Message-ID: <1410439392.20184.17.camel@marge.simpson.net> Subject: Re: perf top -g -U --sort=symbol --children == lalalalala? From: Mike Galbraith To: Namhyung Kim Cc: Arnaldo Carvalho de Melo , LKML Date: Thu, 11 Sep 2014 14:43:12 +0200 In-Reply-To: References: <1410263641.15383.8.camel@marge.simpson.net> <20140909133737.GK2773@kernel.org> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2014-09-11 at 17:09 +0900, Namhyung Kim wrote: > On Tue, Sep 9, 2014 at 10:37 PM, Arnaldo Carvalho de Melo > wrote: > > Em Tue, Sep 09, 2014 at 01:54:01PM +0200, Mike Galbraith escreveu: > >> Seems the now default on --children thingy doesn't like -U much. > > > > Namhyung, can you please take a look at this? > > So what is the problem here? Well, if you don't see anything wrong, I guess nothing at all. > >> Samples: 5K of event 'cycles', Event count (approx.): 2268660922 > >> Children Self Symbol > >> + 46.42% 0.04% [k] system_call_fastpath I'll just turn it off until I figure out what cool stuff this is telling me. why that symbol becomes the number one hit, and why total% > 100. To me, it looks like top smoked it's breakfast, went to lala land ;-) -Mike