From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752539AbaEOEuo (ORCPT ); Thu, 15 May 2014 00:50:44 -0400 Received: from mga09.intel.com ([134.134.136.24]:54566 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750941AbaEOEun (ORCPT ); Thu, 15 May 2014 00:50:43 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,1056,1389772800"; d="scan'208";a="511934316" Message-ID: <5374479F.3050507@intel.com> Date: Thu, 15 May 2014 12:50:39 +0800 From: Jet Chen User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: Tejun Heo CC: Fengguang Wu , LKML , lkp@01.org Subject: [cgroup] a0f9ec1f181: -4.3% will-it-scale.per_thread_ops Content-Type: multipart/mixed; boundary="------------000508070803060209090106" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a multi-part message in MIME format. --------------000508070803060209090106 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Tejun, 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 Legend: ~XX% - stddev percent [+-]XX% - change percent Thanks, Jet --------------000508070803060209090106 Content-Type: text/plain; charset=UTF-8; name="reproduce" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="reproduce" ZWNobyBwZXJmb3JtYW5jZSA+IC9zeXMvZGV2aWNlcy9zeXN0ZW0vY3B1L2NwdTAvY3B1ZnJl cS9zY2FsaW5nX2dvdmVybm9yCmVjaG8gcGVyZm9ybWFuY2UgPiAvc3lzL2RldmljZXMvc3lz dGVtL2NwdS9jcHUxL2NwdWZyZXEvc2NhbGluZ19nb3Zlcm5vcgplY2hvIHBlcmZvcm1hbmNl ID4gL3N5cy9kZXZpY2VzL3N5c3RlbS9jcHUvY3B1MTAvY3B1ZnJlcS9zY2FsaW5nX2dvdmVy bm9yCmVjaG8gcGVyZm9ybWFuY2UgPiAvc3lzL2RldmljZXMvc3lzdGVtL2NwdS9jcHUxMS9j cHVmcmVxL3NjYWxpbmdfZ292ZXJub3IKZWNobyBwZXJmb3JtYW5jZSA+IC9zeXMvZGV2aWNl cy9zeXN0ZW0vY3B1L2NwdTEyL2NwdWZyZXEvc2NhbGluZ19nb3Zlcm5vcgplY2hvIHBlcmZv 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