From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by yocto-www.yoctoproject.org (Postfix, from userid 118) id 47D94E0086E; Mon, 23 Mar 2015 07:10:51 -0700 (PDT) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on yocto-www.yoctoproject.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.3.1 X-Spam-HAM-Report: * -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] Received: from dev.rtsoft.ru (mail.dev.rtsoft.ru [213.79.90.226]) by yocto-www.yoctoproject.org (Postfix) with ESMTP id A2EE2E0085D for ; Mon, 23 Mar 2015 07:10:46 -0700 (PDT) Received: from [192.168.5.130] (fw-int.dev.rtsoft.ru [192.168.1.70]) by dev.rtsoft.ru (Postfix) with ESMTP id 9DE7E411ED; Mon, 23 Mar 2015 17:10:43 +0300 (MSK) Message-ID: <55101EE3.5010201@dev.rtsoft.ru> Date: Mon, 23 Mar 2015 17:10:43 +0300 From: Nikita Yushchenko Organization: RTSoft Software Development Center User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.5.0 MIME-Version: 1.0 To: meta-freescale@yoctoproject.org References: <55083559.2010704@dev.rtsoft.ru> In-Reply-To: <55083559.2010704@dev.rtsoft.ru> Cc: Gennady Kuznetsov Subject: Re: imx6q gpu performance lower than expected X-BeenThere: meta-freescale@yoctoproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Usage and development list for the meta-fsl-* layers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Mar 2015 14:10:51 -0000 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Following up myself. We have tested master + qt 5.3.2 and master + qt 5.4.1 combinations, with LVDS 1280x800 screen and eglfs backend. Overall results are: dizzy, qt 5.3.2, imx6s => 22 fps [this is poor hw, included just for reference] dizzy, qt 5.3.2, imx6q => 37 fps master, qt 5.3.2, imx6q => 49 fps master, qt 5.4.1, imx6q => 59 fps Thus "memory bandwidth" is *not* the limiting factor on original setup. Pure software update resulted into significant fps improvement. Many thanks to Heikki Sarkanen for information that master branch shows better graphics performance. > Hi > > I've built freescale community bsp dizzy for a custom imx6q based board, > and now I'm experimenting with GPU performance under Qt5. > > I have both xcb and eglfs backends running (under different builds). > > However performance is lower than was expected: on LVDS 1280x800, > Qt5_CinematicExperience shows about 35-37 FPS, both under X11 and under > eglfs. If using smaller window under X11, FPS increases, if using > 1920x1080 it goes down to 20. > > This is much smaller than people get [1]. > > [1] https://community.freescale.com/thread/305066 > > CPU in both cases (x11 and egl) is almost unloaded (30% of one core > under eglfs, 30+30 under X11) so looks like speed limiting comes from GPU. > > What could be reason for this? Any hints? > > > TIA, > Nikita Yushchenko >