From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752908AbaEOEzW (ORCPT ); Thu, 15 May 2014 00:55:22 -0400 Received: from mail-qc0-f179.google.com ([209.85.216.179]:38680 "EHLO mail-qc0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751497AbaEOEzV (ORCPT ); Thu, 15 May 2014 00:55:21 -0400 Date: Thu, 15 May 2014 00:55:17 -0400 From: Tejun Heo To: Jet Chen Cc: Fengguang Wu , LKML , lkp@01.org Subject: Re: [cgroup] a0f9ec1f181: -4.3% will-it-scale.per_thread_ops Message-ID: <20140515045517.GC3825@htj.dyndns.org> References: <5374479F.3050507@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5374479F.3050507@intel.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On Thu, May 15, 2014 at 12:50:39PM +0800, Jet Chen wrote: > FYI, we noticed the below changes on > > git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-kill-tree_mutex > commit a0f9ec1f181534694cb5bf40b7b56515b8cabef9 ("cgroup: use cgroup_kn_lock_live() in other cgroup kernfs methods") > > Test case : lkp-nex05/will-it-scale/writeseek > > 2074b6e38668e62 a0f9ec1f181534694cb5bf40b > --------------- ------------------------- > 1027273 ~ 0% -4.3% 982732 ~ 0% TOTAL will-it-scale.per_thread_ops > 136 ~ 3% -43.1% 77 ~43% TOTAL proc-vmstat.nr_dirtied > 0.51 ~ 3% +98.0% 1.01 ~ 4% TOTAL perf-profile.cpu-cycles.shmem_write_end.generic_perform_write.__generic_file_aio_write.generic_file_aio_write.do_sync_write > 1078 ~ 9% -16.3% 903 ~11% TOTAL numa-meminfo.node0.Unevictable > 269 ~ 9% -16.2% 225 ~11% TOTAL numa-vmstat.node0.nr_unevictable > 1.64 ~ 1% -14.3% 1.41 ~ 4% TOTAL perf-profile.cpu-cycles.find_lock_entry.shmem_getpage_gfp.shmem_write_begin.generic_perform_write.__generic_file_aio_write > 1.62 ~ 2% +14.1% 1.84 ~ 1% TOTAL perf-profile.cpu-cycles.lseek64 I have no idea how to read the above. Which direction is plus and which is minus? Are they counting cpu cycles? Which files is the test seeking? Thanks. -- tejun