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, URIBL_BLOCKED,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 0812EC2D0DB for ; Mon, 27 Jan 2020 21:55:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CE3AC2467B for ; Mon, 27 Jan 2020 21:55:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726518AbgA0VzZ (ORCPT ); Mon, 27 Jan 2020 16:55:25 -0500 Received: from foss.arm.com ([217.140.110.172]:49542 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726080AbgA0VzZ (ORCPT ); Mon, 27 Jan 2020 16:55:25 -0500 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 Cc: myungjoo.ham@samsung.com, kyungmin.park@samsung.com, cw00.choi@samsung.com, robh+dt@kernel.org, mark.rutland@arm.com, b.zolnierkie@samsung.com, lukasz.luba@arm.com, dietmar.eggemann@arm.com 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> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.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 -- 2.17.1