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=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 F4026C433E6 for ; Thu, 7 Jan 2021 10:34:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A8A0023142 for ; Thu, 7 Jan 2021 10:34:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727846AbhAGKe0 (ORCPT ); Thu, 7 Jan 2021 05:34:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47858 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726467AbhAGKeZ (ORCPT ); Thu, 7 Jan 2021 05:34:25 -0500 Received: from mail-wm1-x332.google.com (mail-wm1-x332.google.com [IPv6:2a00:1450:4864:20::332]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 667B2C0612F4 for ; Thu, 7 Jan 2021 02:33:30 -0800 (PST) Received: by mail-wm1-x332.google.com with SMTP id n16so4640646wmc.0 for ; Thu, 07 Jan 2021 02:33:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id; bh=asSp+/DMMwMJalGof8YNSkFl2LZ/5ABaWHsM4v5Eee4=; b=eGGPTq1zC5RABYdfNZUVRLL34O38mU3eA51DiYmqH9S1zUvcaaBgkUdUlWTJUUv8Qt WqkBpDIKZHYSWYezARw1epikqrlAS38Q1ResheSeYIbtDIfq4d75lC7NBe0yruM9BQoo QfUwjbvwtll/d2xXJO7NKxx9Wtnnch4EN+QwhD25Q9GSspTASqSQoqiLkJ3Hx+5JXRYG yOZW1XgXQ/OqLoAqVtUfYI13iNlEvhS3mTKd63r2hNWeCrtGX/V2ibE4Z6jZfvPS+ZmY h0MBoypdNlREp6S79zXKNlPm5EBennamwNk72wyeYsNcz/VoPb/UPvI3PP/M1r24vv1E PpBA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=asSp+/DMMwMJalGof8YNSkFl2LZ/5ABaWHsM4v5Eee4=; b=JwWfj06qcZfSrL4hK45mGbK8WQXPUoSuIevpPk+I/Ys8EKNBzDPZ2a/Q7eW4tAB6bY qT99MIqQHvi3tUkXuPEZgd/5q1/EyzniGBVIHhf6S3qAFdlHva8W2KGy81A7DgAXDWSF da6IcCJPgCNS5nDmDm0hGSwOgAl+UM+wG1vRsARNZSZvZsBDj7K7QBPOuv0hECbmGwDP L6oL5dL/VYemyjI4lDfvLDGBRBBZG7/cLlo+I3iPi8T6VVRaK09jdK+IUAxgeSBRKOBf QKi4mF6j/SFYmpkqNXnDKd0L4BaM/KEKMFHkG9WVKa9DNk9667vNOXdc+yKVQnn2svKo 1MkQ== X-Gm-Message-State: AOAM532uwKiZo8LHJTAPIiwCBGU+uitLAVJuKFkbhR2HbMV3qH16JC8C OYCUOenk3813iQmAVupoYtc5Wg== X-Google-Smtp-Source: ABdhPJwNzqUQA0X76hwH99DGsSWfxXvzt7Gmaw2wSrEyziUIiQgk81Rtz6Cgk8U5dnkJ6+0FzbHajw== X-Received: by 2002:a1c:6a02:: with SMTP id f2mr7665360wmc.36.1610015609059; Thu, 07 Jan 2021 02:33:29 -0800 (PST) Received: from localhost.localdomain ([2a01:e0a:f:6020:d7b:24c9:55f9:4b75]) by smtp.gmail.com with ESMTPSA id i9sm7734120wrs.70.2021.01.07.02.33.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Jan 2021 02:33:27 -0800 (PST) From: Vincent Guittot To: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, valentin.schneider@arm.com, linux-kernel@vger.kernel.org Cc: Vincent Guittot Subject: [PATCH 0/3 v2] Reduce number of active LB Date: Thu, 7 Jan 2021 11:33:22 +0100 Message-Id: <20210107103325.30851-1-vincent.guittot@linaro.org> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Few improvements related to active LB and the increase of LB interval. I haven't seen any performcne impact on various benchmarks except for -stress-ng mmapfork : +4.54% on my octo-core arm64 But this was somewhat expected as the changes impact mainly corner cases. Changes since v1: - patch 2: change how LBF_ALL_PINNED is managed as proposed by Valentin - patch 3: updated comment and fix typos Vincent Guittot (3): sched/fair: skip idle cfs_rq sched/fair: don't set LBF_ALL_PINNED unnecessarily sched/fair: reduce cases for active balance kernel/sched/fair.c | 57 +++++++++++++++++++++++++-------------------- 1 file changed, 32 insertions(+), 25 deletions(-) -- 2.17.1