From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73C95C432C0 for ; Wed, 20 Nov 2019 09:45:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 531712243F for ; Wed, 20 Nov 2019 09:45:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726757AbfKTJpS (ORCPT ); Wed, 20 Nov 2019 04:45:18 -0500 Received: from out30-131.freemail.mail.aliyun.com ([115.124.30.131]:34402 "EHLO out30-131.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727259AbfKTJpR (ORCPT ); Wed, 20 Nov 2019 04:45:17 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R641e4;CH=green;DM=||false|;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04423;MF=yun.wang@linux.alibaba.com;NM=1;PH=DS;RN=16;SR=0;TI=SMTPD_---0TidAYKW_1574243111; Received: from testdeMacBook-Pro.local(mailfrom:yun.wang@linux.alibaba.com fp:SMTPD_---0TidAYKW_1574243111) by smtp.aliyun-inc.com(127.0.0.1); Wed, 20 Nov 2019 17:45:13 +0800 Subject: Re: [PATCH 0/3] sched/numa: introduce advanced numa statistic From: =?UTF-8?B?546L6LSH?= To: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Luis Chamberlain , Kees Cook , Iurii Zaikin , =?UTF-8?Q?Michal_Koutn=c3=bd?= , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, "Paul E. McKenney" References: <743eecad-9556-a241-546b-c8a66339840e@linux.alibaba.com> Message-ID: Date: Wed, 20 Nov 2019 17:45:11 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <743eecad-9556-a241-546b-c8a66339840e@linux.alibaba.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Hi, Mel I hope this version has addressed the issues you mentioned :-) Does it looks better now? Regards, Michael Wang On 2019/11/13 上午11:43, 王贇 wrote: > Modern production environment could use hundreds of cgroup to control > the resources for different workloads, along with the complicated > resource binding. > > On NUMA platforms where we have multiple nodes, things become even more > complicated, we hope there are more local memory access to improve the > performance, and NUMA Balancing keep working hard to achieve that, > however, wrong memory policy or node binding could easily waste the > effort, result a lot of remote page accessing. > > We need to perceive such problems, then we got chance to fix it before > there are too much damages, however, there are no good approach yet to > help catch the mouse who introduced the remote access. > > This patch set is trying to fill in the missing pieces， by introduce > the per-cgroup NUMA locality/exectime statistics, and expose the per-task > page migration failure counter, with these statistics, we could achieve > the daily monitoring on NUMA efficiency, to give warning when things going > too wrong. > > Please check the third patch for more details. > > Thanks to Peter, Mel and Michal for the good advices :-) > > Michael Wang (3): > sched/numa: advanced per-cgroup numa statistic > sched/numa: expose per-task pages-migration-failure counter > sched/numa: documentation for per-cgroup numa stat > > Documentation/admin-guide/cg-numa-stat.rst | 161 ++++++++++++++++++++++++ > Documentation/admin-guide/kernel-parameters.txt | 4 + > Documentation/admin-guide/sysctl/kernel.rst | 9 ++ > include/linux/sched.h | 18 ++- > include/linux/sched/sysctl.h | 6 + > init/Kconfig | 9 ++ > kernel/sched/core.c | 91 ++++++++++++++ > kernel/sched/debug.c | 1 + > kernel/sched/fair.c | 33 +++++ > kernel/sched/sched.h | 17 +++ > kernel/sysctl.c | 11 ++ > 11 files changed, 359 insertions(+), 1 deletion(-) > create mode 100644 Documentation/admin-guide/cg-numa-stat.rst > >