From patchwork Mon Jan 27 21:54:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Luba X-Patchwork-Id: 11353301 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 6EE1B1580 for ; Mon, 27 Jan 2020 21:56:09 +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 3621E21739 for ; Mon, 27 Jan 2020 21:56:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="jVcigjmO" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3621E21739 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=NnUQhb9k2LTZpp17lmuXQLRLtSoIT9mbIuLFJPM9oUY=; b=jVcigjmOE/HaXjFnBCsrVAgObw 6bRGf2MI91ZakPO0RiQJmwpWmWBmAjsLMsMTbrtGdgTNKrH75x/QgU73TZPu+D84LimNAC7pN6VIY gdtmw2IVMMlIK7qPFZmU9y+HQMwVkUnAUAh2K7vHHU6SdwtBUSKAu1J1aZyGw6O6ovKjNbMeLln75 Ixj2Y8KOkmy5ODbovStQetGleAghFPzNtjJowxRoyPtrB7sPfiKNN5i87UfuT+RVb8KpfTESTFyWR KCK1M4kk+FPJb29L9xWsp73nZUaYT0N65aAUxrMvhsGU7MTwMJnySJdjVOJAYi/3d84lEIK0cADoi 3JJY71qQ==; 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 1iwCMZ-0000Ka-Tb; Mon, 27 Jan 2020 21:56:07 +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 1iwCM4-0008GQ-QX for linux-arm-kernel@lists.infradead.org; Mon, 27 Jan 2020 21:55:38 +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 1DD1031B; Mon, 27 Jan 2020 13:55:35 -0800 (PST) Received: from e123648.arm.com (unknown [10.37.12.150]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 9E54B3F68E; Mon, 27 Jan 2020 13:55:29 -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 3/3] ARM: exynos_defconfig: Enable Energy Model framework Date: Mon, 27 Jan 2020 21:54:53 +0000 Message-Id: <20200127215453.15144-4-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_135536_918901_94B50ADC X-CRM114-Status: GOOD ( 11.75 ) 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 Enable the Energy Model (EM) brings possibility to use Energy Aware Scheduler (EAS). This compiles the EM but does not enable to run EAS in default. The EAS only works with SchedUtil - a CPUFreq governor which handles direct requests from the scheduler for the frequency change. Thus, to make EAS working in default, the SchedUtil governor should be configured as default CPUFreq governor. Although, the EAS might be enabled in runtime, when the EM is present for CPUs, the SchedUtil is compiled and then set as CPUFreq governor, i.e.: echo schedutil > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor echo schedutil > /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor To check if EAS is ready to work, the read output from the command below should show '1': cat /proc/sys/kernel/sched_energy_aware To disable EAS in runtime simply 'echo 0' to the file above. Some test results, which stress the scheduler on Odroid-XU3: hackbench -l 500 -s 4096 With mainline code and with this patch set. The tests have been made with and without CONFIG_PROVE_LOCKING (PL) (which is set to =y in default exynos_defconfig) | this patch set | mainline |-----------------------------------------------|--------------- | performance | SchedUtil | SchedUtil | performance | governor | governor | governor | governor | | w/o EAS | w/ EAS | ----------------|---------------|---------------|---------------|--------------- hackbench w/ PL | 12.7s | 11.7s | 12.0s | 13.0s - 12.2s hackbench w/o PL| 9.2s | 8.1s | 8.2s | 9.2s - 8.4s 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 1db857056992..c0f8ecabc607 100644 --- a/arch/arm/configs/exynos_defconfig +++ b/arch/arm/configs/exynos_defconfig @@ -18,6 +18,7 @@ CONFIG_ZBOOT_ROM_BSS=0x0 CONFIG_ARM_APPENDED_DTB=y CONFIG_ARM_ATAG_DTB_COMPAT=y CONFIG_CMDLINE="root=/dev/ram0 rw ramdisk=8192 initrd=0x41000000,8M console=ttySAC1,115200 init=/linuxrc mem=256M" +CONFIG_ENERGY_MODEL=y CONFIG_CPU_FREQ=y CONFIG_CPU_FREQ_STAT=y CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y