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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham 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 0DFD2C433B4 for ; Thu, 20 May 2021 12:34:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DAE096135B for ; Thu, 20 May 2021 12:34:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233948AbhETMgM (ORCPT ); Thu, 20 May 2021 08:36:12 -0400 Received: from out30-132.freemail.mail.aliyun.com ([115.124.30.132]:57896 "EHLO out30-132.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231661AbhETMfv (ORCPT ); Thu, 20 May 2021 08:35:51 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R131e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=alimailimapcm10staff010182156082;MF=changhuaixin@linux.alibaba.com;NM=1;PH=DS;RN=19;SR=0;TI=SMTPD_---0UZVdWUN_1621514066; Received: from localhost(mailfrom:changhuaixin@linux.alibaba.com fp:SMTPD_---0UZVdWUN_1621514066) by smtp.aliyun-inc.com(127.0.0.1); Thu, 20 May 2021 20:34:26 +0800 From: Huaixin Chang To: changhuaixin@linux.alibaba.com Cc: bsegall@google.com, dietmar.eggemann@arm.com, dtcccc@linux.alibaba.com, juri.lelli@redhat.com, khlebnikov@yandex-team.ru, linux-kernel@vger.kernel.org, mgorman@suse.de, mingo@redhat.com, odin@uged.al, odin@ugedal.com, pauld@redhead.com, peterz@infradead.org, pjt@google.com, rostedt@goodmis.org, shanpeic@linux.alibaba.com, tj@kernel.org, vincent.guittot@linaro.org, xiyou.wangcong@gmail.com Subject: [PATCH v5 0/3] sched/fair: Burstable CFS bandwidth controller Date: Thu, 20 May 2021 20:34:16 +0800 Message-Id: <20210520123419.8039-1-changhuaixin@linux.alibaba.com> X-Mailer: git-send-email 2.14.4.44.g2045bb6 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Changelog: v5: - Rearrange into 3 patches, one less than the previous version. - The interference to other groups are valued. - Put a limit on burst, so that code is further simplified. - Rebase upon v5.13-rc3. v4: - Adjust assignments in tg_set_cfs_bandwidth(), saving unnecessary assignemnts when quota == RUNTIME_INF. - Getting rid of sysctl_sched_cfs_bw_burst_onset_percent, as there seems no justification for both controlling start bandwidth and a percent way. - Comment improvement in sched_cfs_period_timer() shifts on explaining why max_overrun shifting to 0 is a problem. - Rename previous_runtime to runtime_at_period_start. - Add cgroup2 interface and documentation. - Getting rid of exposing current_bw as there are not enough justification and the updating problem. - Add justification on cpu.stat change in the changelog. - Rebase upon v5.12-rc3. - Correct SoB chain. - Several indentation fixes. - Adjust quota in schbench test from 700000 to 600000. Link: https://lore.kernel.org/lkml/20210316044931.39733-1-changhuaixin@linux.alibaba.com/ v3: - Fix another issue reported by test robot. - Update docs as Randy Dunlap suggested. Link: https://lore.kernel.org/lkml/20210120122715.29493-1-changhuaixin@linux.alibaba.com/ v2: - Fix an issue reported by test robot. - Rewriting docs. Appreciate any further suggestions or help. Link: https://lore.kernel.org/lkml/20210121110453.18899-1-changhuaixin@linux.alibaba.com/ v1 Link: https://lore.kernel.org/lkml/20201217074620.58338-1-changhuaixin@linux.alibaba.com/ Previously, Cong Wang and Konstantin Khlebnikov proposed similar feature: https://lore.kernel.org/lkml/20180522062017.5193-1-xiyou.wangcong@gmail.com/ https://lore.kernel.org/lkml/157476581065.5793.4518979877345136813.stgit@buzz/ This time we present more latency statistics and handle overflow while accumulating. Huaixin Chang (3): sched/fair: Introduce the burstable CFS controller sched/fair: Add cfs bandwidth burst statistics sched/fair: Add document for burstable CFS bandwidth Documentation/admin-guide/cgroup-v2.rst | 17 +++--- Documentation/scheduler/sched-bwc.rst | 76 ++++++++++++++++++++++---- include/linux/sched/sysctl.h | 1 + kernel/sched/core.c | 96 ++++++++++++++++++++++++++------- kernel/sched/fair.c | 32 ++++++++++- kernel/sched/sched.h | 4 ++ kernel/sysctl.c | 9 ++++ 7 files changed, 200 insertions(+), 35 deletions(-) -- 2.14.4.44.g2045bb6