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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9E80EC43334 for ; Thu, 9 Jun 2022 12:16:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=+x8WDWoRgcThxqurj0Jq5N70wTolp7MOHS23A7ac7gk=; b=wXK/A+tUyQvI6x eCi418/dVKVmTXuSofb8DT9y3ACWA1JNsnYz7ho1TAym7lYuS60GxgQtGAsH6z8TqNvDCZG3hzje6 rSBf5ywLrYV+ePKrWBYS/4n6tUck/6CMV0RD5Aefa4CwHTZaz3VWF71zSRaNWAMzXZklgLrwr8VnF /kNW67EZbKYyRs+72S5vd0C0Z+DSRG9erAspch7Y5BuhhANaqp2I73zbHLAP/8KIaP1pXpqK9NhVH 0rosOo3CtgGduLudepvkeAVJPGNS3hLdh3BSurqHDOwACM7t3DSqaHegGSCJazAm7qXKAZF7MNRGy HhHHv2oT25f39RTmUtAA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nzH41-001dyX-My; Thu, 09 Jun 2022 12:15:02 +0000 Received: from szxga02-in.huawei.com ([45.249.212.188]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nzGwn-001aaC-N8 for linux-arm-kernel@lists.infradead.org; Thu, 09 Jun 2022 12:07:36 +0000 Received: from canpemm500009.china.huawei.com (unknown [172.30.72.57]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4LJjVR1vh4zjXN4; Thu, 9 Jun 2022 20:06:07 +0800 (CST) Received: from localhost.localdomain (10.67.164.66) by canpemm500009.china.huawei.com (7.192.105.203) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 9 Jun 2022 20:07:29 +0800 From: Yicong Yang To: , , , , , , , CC: , , , , , , , , , , <21cnbao@gmail.com>, , , , Subject: [PATCH v4 0/2] sched/fair: Wake task within the cluster when possible Date: Thu, 9 Jun 2022 20:06:20 +0800 Message-ID: <20220609120622.47724-1-yangyicong@hisilicon.com> X-Mailer: git-send-email 2.31.0 MIME-Version: 1.0 X-Originating-IP: [10.67.164.66] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To canpemm500009.china.huawei.com (7.192.105.203) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220609_050734_027280_497FB91A X-CRM114-Status: UNSURE ( 7.25 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This is the follow-up work to support cluster scheduler. Previously we have added cluster level in the scheduler for both ARM64[1] and X86[2] to support load balance between clusters to bring more memory bandwidth and decrease cache contention. This patchset, on the other hand, takes care of wake-up path by giving CPUs within the same cluster a try before scanning the whole LLC to benefit those tasks communicating with each other. [1] 778c558f49a2 ("sched: Add cluster scheduler level in core and related Kconfig for ARM64") [2] 66558b730f25 ("sched: Add cluster scheduler level for x86") Change since v3: - fix compile error when !CONFIG_SCHED_CLUSTER, reported by lkp test. Link: https://lore.kernel.org/lkml/20220608095758.60504-1-yangyicong@hisilicon.com/ Change since v2: - leverage SIS_PROP to suspend redundant scanning when LLC is overloaded - remove the ping-pong suppression - address the comment from Tim, thanks. Link: https://lore.kernel.org/lkml/20220126080947.4529-1-yangyicong@hisilicon.com/ Change since v1: - regain the performance data based on v5.17-rc1 - rename cpus_share_cluster to cpus_share_resources per Vincent and Gautham, thanks! Link: https://lore.kernel.org/lkml/20211215041149.73171-1-yangyicong@hisilicon.com/ Barry Song (2): sched: Add per_cpu cluster domain info and cpus_share_resources API sched/fair: Scan cluster before scanning LLC in wake-up path include/linux/sched/sd_flags.h | 7 ++++++ include/linux/sched/topology.h | 8 ++++++- kernel/sched/core.c | 12 ++++++++++ kernel/sched/fair.c | 44 +++++++++++++++++++++++++++++++--- kernel/sched/sched.h | 2 ++ kernel/sched/topology.c | 15 ++++++++++++ 6 files changed, 84 insertions(+), 4 deletions(-) -- 2.24.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel