From patchwork Wed Dec 15 04:11:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yicong Yang X-Patchwork-Id: 12696154 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 66844C433F5 for ; Wed, 15 Dec 2021 04:13:27 +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=4CM5TaKj4DTJPpAZHt0iYEu2NXV1QB/HVcnx52Unmkk=; b=vzVF+hNxdgPdnV 8pHPgw8txmfmbucvXRLyp8du9hnY6vAmyLUXeQWFvSFMn4f9tLSe0BtBvVagXw0H3/TKZCFVRy4CA p9CuXkyRFF4eu0uHqzBvLJ2+clIlm30KfJwJXv1o/0kO+G2rl24wNII2D1E80yfAFUqzzLEA6AEQz 2GgkEQFMxeNMX+uai0NrgIajMeH45tB8iZjQbwkE2Qob40LCuWkQaskp+v5FKC/mEW3XExnurcAY0 avwBoLBNpi13QLSq7Cx44pe6SCbJtImTxBlX/S+rDOj6Yrz7naQybQyLj2e9V1m2BwJGnl086JCED Pexj0Lki14OrbnQipr9w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mxLe9-00GcIu-GG; Wed, 15 Dec 2021 04:12:05 +0000 Received: from szxga01-in.huawei.com ([45.249.212.187]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mxLe5-00GcHK-Ur for linux-arm-kernel@lists.infradead.org; Wed, 15 Dec 2021 04:12:03 +0000 Received: from canpemm500009.china.huawei.com (unknown [172.30.72.56]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4JDMF45T6gzZdf7; Wed, 15 Dec 2021 12:08:56 +0800 (CST) Received: from localhost.localdomain (10.67.165.103) 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 15.1.2308.20; Wed, 15 Dec 2021 12:11:56 +0800 From: Yicong Yang To: , , , , , , CC: , , , , , , , , , , <21cnbao@gmail.com>, , Subject: [PATCH 0/2] sched/fair: Wake task within the cluster when possible Date: Wed, 15 Dec 2021 12:11:47 +0800 Message-ID: <20211215041149.73171-1-yangyicong@hisilicon.com> X-Mailer: git-send-email 2.31.0 MIME-Version: 1.0 X-Originating-IP: [10.67.165.103] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) 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-20211214_201202_212127_F0188154 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: , 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") Barry Song (2): sched: Add per_cpu cluster domain info and cpus_share_cluster API sched/fair: Scan cluster before scanning LLC in wake-up path include/linux/sched/sd_flags.h | 5 ++++ include/linux/sched/topology.h | 8 +++++- kernel/sched/core.c | 12 +++++++++ kernel/sched/fair.c | 46 +++++++++++++++++++++++++++++++--- kernel/sched/sched.h | 2 ++ kernel/sched/topology.c | 9 +++++++ 6 files changed, 77 insertions(+), 5 deletions(-)