From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754184AbaICDPJ (ORCPT ); Tue, 2 Sep 2014 23:15:09 -0400 Received: from www.sr71.net ([198.145.64.142]:55792 "EHLO blackbird.sr71.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751730AbaICDPG (ORCPT ); Tue, 2 Sep 2014 23:15:06 -0400 Message-ID: <540687B9.7070305@sr71.net> Date: Tue, 02 Sep 2014 20:15:05 -0700 From: Dave Hansen User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 To: Johannes Weiner , Linus Torvalds CC: Michal Hocko , Hugh Dickins , Tejun Heo , Vladimir Davydov , Andrew Morton , LKML , Linux-MM Subject: Re: regression caused by cgroups optimization in 3.17-rc2 References: <54061505.8020500@sr71.net> <20140902221814.GA18069@cmpxchg.org> <5406466D.1020000@sr71.net> <20140903001009.GA25970@cmpxchg.org> <20140903013317.GA26086@cmpxchg.org> In-Reply-To: <20140903013317.GA26086@cmpxchg.org> 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 09/02/2014 06:33 PM, Johannes Weiner wrote: > kfree isn't eating 56% of "all cpu time" here, and it wasn't clear to > me whether Dave filtered symbols from only memcontrol.o, memory.o, and > mmap.o in a similar way. I'm not arguing against the regression, I'm > just trying to make sense of the numbers from the *patched* kernel. I guess I could have included it in the description, but that was a pretty vanilla run: perf top --call-graph=fp --stdio > foo.txt I didn't use any filtering. I didn't even know I _could_ filter. :)