From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heiko Stuebner Subject: Re: [PATCH v2] arm64: rk3399: Add capacity-dmips-mhz attributes Date: Sun, 03 Mar 2019 14:35:40 +0100 Message-ID: <17649285.loQdcguGhd@phil> References: <20190302131030.2091-1-marc.zyngier@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20190302131030.2091-1-marc.zyngier-5wv7dgnIgG8@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+glpar-linux-rockchip=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org To: Marc Zyngier Cc: Lin Huang , Jeffy Chen , Douglas Anderson , linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Enric Balletbo i Serra , Robin Murphy , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: linux-rockchip.vger.kernel.org Am Samstag, 2. M=E4rz 2019, 14:10:30 CET schrieb Marc Zyngier: > The RK3399 has the interesting property to be a so called "big-little" > system, where not all the CPUs are equal (the A53s are much weaker > than the A72s). > = > So far, we're not telling the OS that there is such a difference in > processing capacity, and Linux assumes that they are equal. Too bad. > = > Let's tell the OS about this by using the capacity-dmips-mhz > property. The values used here are those used on the Juno platform, > which is quite similar. This leads to the scheduler knowing that > it can pack more tasks on the A72s, and leads to a better interactive > experience. > = > Tested-by: Robin Murphy > Signed-off-by: Marc Zyngier Subject "arm64: dts: rockchip: foobar on rk3399" for the future please :-) I've fixed that up and applied the patch for 5.2 Thanks Heiko