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 233F1C35247 for ; Fri, 7 Feb 2020 02:38:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EFAD920715 for ; Fri, 7 Feb 2020 02:38:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727154AbgBGCiD (ORCPT ); Thu, 6 Feb 2020 21:38:03 -0500 Received: from out30-42.freemail.mail.aliyun.com ([115.124.30.42]:57018 "EHLO out30-42.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726597AbgBGCiD (ORCPT ); Thu, 6 Feb 2020 21:38:03 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R651e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04407;MF=yun.wang@linux.alibaba.com;NM=1;PH=DS;RN=18;SR=0;TI=SMTPD_---0TpJB1NS_1581043075; Received: from testdeMacBook-Pro.local(mailfrom:yun.wang@linux.alibaba.com fp:SMTPD_---0TpJB1NS_1581043075) by smtp.aliyun-inc.com(127.0.0.1); Fri, 07 Feb 2020 10:37:56 +0800 From: =?UTF-8?B?546L6LSH?= Subject: [PATCH RESEND v8 0/2] sched/numa: introduce numa locality 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" , Randy Dunlap , Jonathan Corbet References: <743eecad-9556-a241-546b-c8a66339840e@linux.alibaba.com> <207ef46c-672c-27c8-2012-735bd692a6de@linux.alibaba.com> <040def80-9c38-4bcc-e4a8-8a0d10f131ed@linux.alibaba.com> <25cf7ef5-e37e-7578-eea7-29ad0b76c4ea@linux.alibaba.com> <443641e7-f968-0954-5ff6-3b7e7fed0e83@linux.alibaba.com> Message-ID: Date: Fri, 7 Feb 2020 10:37:55 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org v8: * document edited v7: * rebased on latest linux-next v6: * fix compile failure when NUMA disabled v5: * improved documentation v4: * fix comments and improved documentation v3: * simplified the locality concept & implementation v2: * improved documentation 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 notice such problems, then we got chance to fix it before there are too much damages, however, there are no good monitoring 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 info, with this new statistics, we could achieve the daily monitoring on NUMA efficiency, to give warning when things going too wrong. Please check the second patch for more details. Michael Wang (2): sched/numa: introduce per-cgroup NUMA locality info sched/numa: documentation for per-cgroup numa statistics Documentation/admin-guide/cg-numa-stat.rst | 178 ++++++++++++++++++++++++ Documentation/admin-guide/index.rst | 1 + Documentation/admin-guide/kernel-parameters.txt | 4 + Documentation/admin-guide/sysctl/kernel.rst | 9 ++ include/linux/sched.h | 15 ++ include/linux/sched/sysctl.h | 6 + init/Kconfig | 11 ++ kernel/sched/core.c | 75 ++++++++++ kernel/sched/fair.c | 62 +++++++++ kernel/sched/sched.h | 12 ++ kernel/sysctl.c | 11 ++ 11 files changed, 384 insertions(+) create mode 100644 Documentation/admin-guide/cg-numa-stat.rst -- 2.14.4.44.g2045bb6