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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 D890FC43603 for ; Fri, 6 Dec 2019 16:15:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A4E0F206DF for ; Fri, 6 Dec 2019 16:15:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726345AbfLFQPh (ORCPT ); Fri, 6 Dec 2019 11:15:37 -0500 Received: from out30-133.freemail.mail.aliyun.com ([115.124.30.133]:58981 "EHLO out30-133.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726271AbfLFQPh (ORCPT ); Fri, 6 Dec 2019 11:15:37 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R951e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04423;MF=rocking@linux.alibaba.com;NM=1;PH=DS;RN=10;SR=0;TI=SMTPD_---0Tk8WAei_1575648901; Received: from localhost(mailfrom:rocking@linux.alibaba.com fp:SMTPD_---0Tk8WAei_1575648901) by smtp.aliyun-inc.com(127.0.0.1); Sat, 07 Dec 2019 00:15:35 +0800 From: Peng Wang To: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de Cc: linux-kernel@vger.kernel.org, Peng Wang Subject: [PATCH] schied/fair: Skip updating "contrib" without load Date: Sat, 7 Dec 2019 00:14:22 +0800 Message-Id: <1575648862-12095-1-git-send-email-rocking@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We only update load_sum/runnable_load_sum/util_sum with decayed old sum when load is clear. Signed-off-by: Peng Wang --- kernel/sched/pelt.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel/sched/pelt.c b/kernel/sched/pelt.c index a96db50..4392953 100644 --- a/kernel/sched/pelt.c +++ b/kernel/sched/pelt.c @@ -129,8 +129,9 @@ static u32 __accumulate_pelt_segments(u64 periods, u32 d1, u32 d3) * Step 2 */ delta %= 1024; - contrib = __accumulate_pelt_segments(periods, - 1024 - sa->period_contrib, delta); + if (load) + contrib = __accumulate_pelt_segments(periods, + 1024 - sa->period_contrib, delta); } sa->period_contrib = delta; -- 1.8.3.1