From patchwork Mon Jan 27 21:54:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Luba X-Patchwork-Id: 11353293 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 04D301580 for ; Mon, 27 Jan 2020 21:55:38 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id D691D21739 for ; Mon, 27 Jan 2020 21:55:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="YLlwtVjc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D691D21739 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=tiKrAsgYxMtn4e9mU8zJN3XwXXd7SGJ3Q5coEZj14IA=; b=YLlwtVjc+Dq6XiOQluOvns6fG7 5HI4U3mAOJ7PJEReftbCKJNbzYPYAptZwVtk3WRg2M8d+Wce6tHU/C2kPBzOmDHYbOMZyFmqhSJ9Q W7WRnvkkkZUD/MpU0TXVnM7M1N/vxs9yeB0MgY02kZiMESZpZPyaG/8qyrMdQTgQ//JKOWLpfcnO3 U51wG68c6kjS765XrpC/7UxIemk86LOv0CGQjJdfVuj+5FOxIo9/WNoR2EyL8QNeOSeSlbvevF5Am 8GHTHiyRDvQGG36r/T9b+eBajVlD59aiAwAJDtp2hvpZetpebyeFx2O/9PwW9IJi6O0BeHWz8VCQ7 6xVjbctg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iwCM4-0008FM-7o; Mon, 27 Jan 2020 21:55:36 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iwCLv-00087A-4E for linux-arm-kernel@lists.infradead.org; Mon, 27 Jan 2020 21:55:28 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C957B101E; Mon, 27 Jan 2020 13:55:24 -0800 (PST) Received: from e123648.arm.com (unknown [10.37.12.150]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 214493F68E; Mon, 27 Jan 2020 13:55:18 -0800 (PST) From: lukasz.luba@arm.com To: kgene@kernel.org, krzk@kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH 1/3] ARM: exynos_defconfig: Enable SCHED_MC Date: Mon, 27 Jan 2020 21:54:51 +0000 Message-Id: <20200127215453.15144-2-lukasz.luba@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200127215453.15144-1-lukasz.luba@arm.com> References: <20200127215453.15144-1-lukasz.luba@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200127_135527_206120_AD7859A6 X-CRM114-Status: UNSURE ( 8.90 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.7 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-0.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [217.140.110.172 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, b.zolnierkie@samsung.com, robh+dt@kernel.org, cw00.choi@samsung.com, kyungmin.park@samsung.com, myungjoo.ham@samsung.com, dietmar.eggemann@arm.com, lukasz.luba@arm.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Lukasz Luba Since the 'capacities-dmips-mhz' are present in the CPU nodes, make use of this knowledge in smarter decisions during scheduling. The values in 'capacities-dmips-mhz' are normilized, this means that i.e. when CPU0's capacities-dmips-mhz=100 and CPU1's 'capacities-dmips-mhz'=50, cpu0 is twice fast as CPU1, at the same frequency. The proper hirarchy in sched_domain topology could exploit the SoC architecture advantages like big.LITTLE. Enabling the SCHED_MC will create two levels in sched_domain hierarchy, which might be observed in: grep . /proc/sys/kernel/sched_domain/cpu*/domain*/{name,flags} /proc/sys/kernel/sched_domain/cpu0/domain0/name:MC /proc/sys/kernel/sched_domain/cpu0/domain1/name:DIE ... /proc/sys/kernel/sched_domain/cpu0/domain0/flags:575 /proc/sys/kernel/sched_domain/cpu0/domain1/flags:4223 Signed-off-by: Lukasz Luba --- arch/arm/configs/exynos_defconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/configs/exynos_defconfig b/arch/arm/configs/exynos_defconfig index e7e4bb5ad8d5..1db857056992 100644 --- a/arch/arm/configs/exynos_defconfig +++ b/arch/arm/configs/exynos_defconfig @@ -8,6 +8,7 @@ CONFIG_PERF_EVENTS=y CONFIG_ARCH_EXYNOS=y CONFIG_CPU_ICACHE_MISMATCH_WORKAROUND=y CONFIG_SMP=y +CONFIG_SCHED_MC=y CONFIG_BIG_LITTLE=y CONFIG_NR_CPUS=8 CONFIG_HIGHMEM=y