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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 2B39CC11D15 for ; Thu, 20 Feb 2020 18:00:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 093622467E for ; Thu, 20 Feb 2020 18:00:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582221649; bh=mWtgtFWAoWaJEiv18O1INel2Oq4nWzK1Yo0KUp9+Xok=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=VBABfyuopfp8fEffUKv9VSPpvWcjXSwCx0P8gHEakinCjIRqjY9bjJ6lwOYjkftB+ XCi+f+S+fZDpyN8zRRqTBLJu3ffwlVpdJ6Hk+iig48sVXGQbG+5mYCkiN38WLNnLPQ lmI7gODD+ZIy30X2fbNQu2u5lL3vll4jsIgnFqaU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728463AbgBTSAs (ORCPT ); Thu, 20 Feb 2020 13:00:48 -0500 Received: from mail-ed1-f67.google.com ([209.85.208.67]:37413 "EHLO mail-ed1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728354AbgBTSAs (ORCPT ); Thu, 20 Feb 2020 13:00:48 -0500 Received: by mail-ed1-f67.google.com with SMTP id t7so23155375edr.4; Thu, 20 Feb 2020 10:00:45 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=JuWavBe6OXyRFy5qql3DEFdCwPYGMywA79SDbY508v4=; b=ZAdsux1lXeRKDT//oS/PZRqYIHiJBgSn720SlCyHD31cakfxNNnwcbjAnmt8DLPe98 FVZy7RaYvo+l1arPYoZlddPxxsz1WK5LKUN2zDkJNIHV5rxePheJYa1Cc5ByyfK7JuCJ 4P/xqSYQt69fjd4gxXflBBtRlXGEYBcs55Tx0Low7nZG9alOXHxsvmS6MwIdeVM1LRbV 4/pGqOhBOT3PtEYtR1UPSHqZ3WW2LF+MFhP+O7U/cFrjNZoCIbALdSzeyj/zHah7Yhf4 8CTCaW5qVrbM/ARBCR5WB9j8Mn07QkE8LqNFqpzkYAZvP9vD1/lITos88bggs3ZgVNgt Huew== X-Gm-Message-State: APjAAAXGja9/sJJlc4zfEyN/mysWkzReY4K1FTiiDomhFpXTw1WetHui liyAhRf2Fg18ucACDyWwGNo= X-Google-Smtp-Source: APXvYqwN5Yx4Jc42BqpycwqSM0vNnKWMTJp0qMmgsdSQ1M3eTaby6XleOAjAIb1VUKWVgqrdjO6gCg== X-Received: by 2002:a17:906:19c8:: with SMTP id h8mr31704573ejd.250.1582221644629; Thu, 20 Feb 2020 10:00:44 -0800 (PST) Received: from kozik-lap ([194.230.155.125]) by smtp.googlemail.com with ESMTPSA id yh21sm14798ejb.62.2020.02.20.10.00.42 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 20 Feb 2020 10:00:43 -0800 (PST) Date: Thu, 20 Feb 2020 19:00:40 +0100 From: Krzysztof Kozlowski To: Lukasz Luba Cc: linux-kernel@vger.kernel.org, kgene@kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-pm@vger.kernel.org, myungjoo.ham@samsung.com, kyungmin.park@samsung.com, cw00.choi@samsung.com, robh+dt@kernel.org, mark.rutland@arm.com, b.zolnierkie@samsung.com, dietmar.eggemann@arm.com Subject: Re: [RESEND PATCH v2 0/2] Enable Odroid-XU3/4 to use Energy Model and Energy Aware Scheduler Message-ID: <20200220180040.GA8338@kozik-lap> References: <20200220095636.29469-1-lukasz.luba@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200220095636.29469-1-lukasz.luba@arm.com> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Thu, Feb 20, 2020 at 09:56:34AM +0000, Lukasz Luba wrote: > Hi all, > > This is just a resend, now with proper v2 in the patches subject. > > The Odroid-XU4/3 is a decent and easy accessible ARM big.LITTLE platform, > which might be used for research and development. > > This small patch set provides possibility to run Energy Aware Scheduler (EAS) > on Odroid-XU4/3 and experiment with it. > > The patch 1/2 provides 'dynamic-power-coefficient' in CPU DT nodes, which is > then used by the Energy Model (EM). > The patch 2/2 enables SCHED_MC (which adds another level in scheduling domains) > and enables EM making EAS possible to run (when schedutil is set as a CPUFreq > governor). > > 1. Test results > > Two types of different tests have been executed. The first is energy test > case showing impact on energy consumption of this patch set. It is using a > synthetic set of tasks (rt-app based). The second is the performance test > case which is using hackbench (less time to complete is better). > In both tests schedutil has been used as cpufreq governor. In all tests > PROVE_LOCKING has not been compiled into the kernels. > > 1.1 Energy test case > > 10 iterations of 24 periodic rt-app tasks (16ms period, 10% duty-cycle) > with energy measurement. The cpufreq governor - schedutil. Unit is Joules. > The energy is calculated based on hwmon0 and hwmon3 power1_input. > The goal is to save energy, lower is better. > > +-----------+-----------------+------------------------+ > | | Without patches | With patches | > +-----------+--------+--------+----------------+-------+ > | benchmark | Mean | RSD* | Mean | RSD* | > +-----------+--------+--------+----------------+-------+ > | 24 rt-app | 21.56 | 1.37% | 19.85 (-9.2%) | 0.92% | > | tasks | | | | | > +-----------+--------+--------+----------------+-------+ > > 1.2 Performance test case > > 10 consecutive iterations of hackbench (hackbench -l 500 -s 4096), > no delay between two successive executions. > The cpufreq governor - schedutil. Units in seconds. > The goal is to see not regression, lower completion time is better. > > +-----------+-----------------+------------------------+ > | | Without patches | With patches | > +-----------+--------+--------+----------------+-------+ > | benchmark | Mean | RSD* | Mean | RSD* | > +-----------+--------+--------+----------------+-------+ > | hackbench | 8.15 | 2.86% | 7.95 (-2.5%) | 0.60% | > +-----------+--------+--------+----------------+-------+ > > *RSD: Relative Standard Deviation (std dev / mean) Nice measurements! Applied both, thank you. Best regards, Krzysztof