From mboxrd@z Thu Jan 1 00:00:00 1970 From: Krzysztof Kozlowski Subject: Re: [PATCH 3/4] arm: dts: exynos: add exynos5422 cpu capacity-dmips-mhz information Date: Sun, 17 Sep 2017 09:37:43 +0200 Message-ID: <20170917073743.GD19716@kozik-book> References: <20170830144120.9312-1-dietmar.eggemann@arm.com> <20170830144120.9312-4-dietmar.eggemann@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Return-path: Content-Disposition: inline In-Reply-To: <20170830144120.9312-4-dietmar.eggemann@arm.com> Sender: linux-samsung-soc-owner@vger.kernel.org To: Dietmar Eggemann Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Russell King , Rob Herring , Mark Rutland , Kukjin Kim , Vincent Guittot , Juri Lelli List-Id: devicetree@vger.kernel.org On Wed, Aug 30, 2017 at 03:41:19PM +0100, Dietmar Eggemann wrote: > The following 'capacity-dmips-mhz' dt property values are used: > > Cortex-A15: 1024, Cortex-A7: 539 > > They have been derived form the cpu_efficiency values: > > Cortex-A15: 3891, Cortex-A7: 2048 > > by scaling them so that the Cortex-A15s (big cores) use 1024. > > The cpu_efficiency values were originally derived from the "Big.LITTLE > Processing with ARM Cortex™-A15 & Cortex-A7" white paper > (http://www.cl.cam.ac.uk/~rdm34/big.LITTLE.pdf). Table 1 lists 1.9x > (3891/2048) as the Cortex-A15 vs Cortex-A7 performance ratio for the > Dhrystone benchmark. > > The following platforms are affected once cpu-invariant accounting > support is re-connected to the task scheduler: > > odroidxu3, odroidxu3-lite, odroidxu4 > > Cc: Rob Herring > Cc: Mark Rutland > Cc: Russell King > Cc: Kukjin Kim > Cc: Krzysztof Kozlowski > Signed-off-by: Dietmar Eggemann > --- > arch/arm/boot/dts/exynos5422-cpus.dtsi | 8 ++++++++ > 1 file changed, 8 insertions(+) > Thanks, applied. Best regards, Krzysztof