On Fri, 24 Jan 2014 09:33:24 -0500 Chris Seekamp <crsb...@comcast.net> said:
this is indicative of problems with the driver. you have seemingly es2gears blasting to the framebuffer and/or the same pixmap buffer the root window lives in for starters as opposed to sticking to its own pixmap buffer. this is all out of the hands of the compositor and in the hads of the back-end drivers (2d xorg drivers and.or drm/dri or even egl/gles libs). and yes - compositing costs performance. the better the compositor and/or the drivers, the less that cost. the theoretical BEST case is to add a 1ingle copy to the pipeline - so any area of the screen that updates needs an extra copy. thats in theory. in practice this depends on driver and compositor. with e you will get only this single copy if drivers are "perfect", but that copy may be the ENTIRE screen UNLESS your drivers support a partial render mechanism. evas supports 3 of them for glx+egl/gles already. more depending how you count them. > I am working on Bodhi on Samsung Chromebook (ARM). I have noticed a > significant difference in the behavior of the es2gears testing program > when the Composite module is loaded and when it isn't. I am using the > Mali T604 graphics using the latest Mali X11 user space libraries. > Without Composite loaded, es2gears runs perfectly and the frame rate is > high. With Composite the rendering is bad (colored lines across top of > screen) and the frame rate is low. I am attaching the screenshots for > comparison. The UXTerm window shows the frame rate in both cases. > > Is this indicative of a possible issue with the Composite module or is > this to be expected? > > Thanks. > > -- > Chris Seekamp > cseek...@acm.org > (using icedove on bodhi linux) > -- ------------- Codito, ergo sum - "I code, therefore I am" -------------- The Rasterman (Carsten Haitzler) ras...@rasterman.com ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments & Everything In Between. Get a Quote or Start a Free Trial Today. http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk _______________________________________________ enlightenment-devel mailing list enlightenment-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/enlightenment-devel
