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=-5.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,URIBL_DBL_ABUSE_MALW, USER_AGENT_SANE_1 autolearn=unavailable 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 898E7C2D0DB for ; Fri, 31 Jan 2020 17:38:34 +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 5DA312082E for ; Fri, 31 Jan 2020 17:38:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="JZFu0jWQ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5DA312082E 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+infradead-linux-arm-kernel=archiver.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-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=jG4csOihOiQSVm39B+QCX7syVm23mwuMbXE5m4LdLgA=; b=JZFu0jWQ5Os1mW+f/LMJK/Wqo e4cbmC8KnlLhDoLfAHyso9O84zJ+lq0N7Zi99zw0LUtHFImNk1AKdX2Op5pgOdtsmiLUrEV2ASGY+ 5NjzQvj6YGxBB334zEQpemJWle+XRLIiph5qWHD6TPxjrz2oEd204b2sbvedWtJBJCSwKZh4PseIQ UVHMz//pY6drPvz2PJn4Qdpnbt1b3fRCsTRYApNnld8rnQBRvFF1lngKSNtEJQWA6noNZ/Ft0SODZ oiF5iHJHziUdmnLfzavM6UH4EISczAnGTCT5I2eo+TasBSG/AOplIG85CO6pT68xTY8X3qmaewHJd 1Y1Qp/Sww==; 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 1ixaFT-0004KF-EE; Fri, 31 Jan 2020 17:38:31 +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 1ixaFQ-0004Fm-Pz for linux-arm-kernel@lists.infradead.org; Fri, 31 Jan 2020 17:38:30 +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 AE826FEC; Fri, 31 Jan 2020 09:38:27 -0800 (PST) Received: from [10.37.12.54] (unknown [10.37.12.54]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 188C23F68E; Fri, 31 Jan 2020 09:38:18 -0800 (PST) Subject: Re: [PATCH 3/3] ARM: exynos_defconfig: Enable Energy Model framework To: Bartlomiej Zolnierkiewicz References: <20200127215453.15144-1-lukasz.luba@arm.com> <20200127215453.15144-4-lukasz.luba@arm.com> From: Lukasz Luba Message-ID: Date: Fri, 31 Jan 2020 17:38:09 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200131_093828_931244_FD90C909 X-CRM114-Status: GOOD ( 19.12 ) 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, devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org, robh+dt@kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, krzk@kernel.org, cw00.choi@samsung.com, kyungmin.park@samsung.com, kgene@kernel.org, myungjoo.ham@samsung.com, dietmar.eggemann@arm.com, linux-arm-kernel@lists.infradead.org Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Bartek, On 1/31/20 1:30 PM, Bartlomiej Zolnierkiewicz wrote: > > Hi, > > On 1/27/20 10:54 PM, lukasz.luba@arm.com wrote: >> 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 > > Would you happen to have measurements of how much power is > saved by running hackbench using "SchedUtil governor w/ EAS" > instead of "SchedUtil governor w/o EAS"? I need to check if this xu3 ina2xx can aggregate energy or it's only drained-current-at-that-moment value. Regards, Lukasz > > Best regards, > -- > Bartlomiej Zolnierkiewicz > Samsung R&D Institute Poland > Samsung Electronics > >> 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel