On Sat, 2 Apr 2016 14:25:48 +0200 Andreas Volz <li...@brachttal.net> said:

> Am Sat, 2 Apr 2016 11:37:27 +0900 schrieb Carsten Haitzler (The
> Rasterman):
> 
> > On Sat, 2 Apr 2016 00:19:35 +0200 Andreas Volz <li...@brachttal.net>
> > said:
> > 
> > > Hello,
> > > 
> > > I compiled e20 on Raspberry Pi 2 with latest Raspbian and it works.
> > > I had to deactivate Composite Effects and switch to Software
> > > renderer because it says there's no OpenGL support.
> > > 
> > > The reason because I did this is that like to run the Raspi with a
> > > 800x480 display and several fullscreen EFL applications which are
> > > stacked one over the other and the above one with alpha and shaped
> > > window.
> > > 
> > > I use E20 only as layer manager and deactivated all other elements.
> > > Maybe E20 is oversized for that reason.
> > > 
> > > I experienced now that the CPU load of the E process is really high
> > > even if nothing much happens. In idle the load is >10%, but if I
> > > render some edje content in my application the E process goes fast
> > > up >60-100% CPU. My application itself has very low CPU usage.
> > 
> > software will have lots of overhead in x11. wayland actually will  be
> > quite a lot better (wayland_shm). the reason i - any update - a
> > blinking curor needs to ask x to copy pixels from the update
> > region(s) into a shm buffer, then depending maybe copy again to a
> > destination buffer, THEN render the canvas (updating objects withint
> > the render update region) and again copying/scaling/blending to an
> > update region shm buffer... THEN this shm buffer is copied to the
> > actual fraembuffer by the xserver.
> > 
> > with gl and a decent driver , texture from pixmap, the render/blend
> > is done by gpu and the rest is zero-copy.
> > 
> > in wayland same for gl and wayland_shm makes it zero-copy for clients
> > to send updates to compositor. if compositor is also sw, it's just
> > the rendering cot, then the buffer swap which is zero-copy.
> > 
> > so yes - you'll have overhead. several copies of updates everywhere.
> > even a tiny blinking cursor causes all of the above.
> > 
> > oh if your app uses a shaped window things can be even worse as e ha
> > to merge shape rects into the alpha values of the pixel data it just
> > copied... :)
> > 
> > maybe you might want to try e in wayland mode? it doesn't NEED
> > egl/gles. just kms/drm ...
> 
> The wayland on the system seems to be to old (<1.8?). At least E
> reports a configure check problem.

:( you could look for updated wl packages - or try something else like arch?


-- 
------------- Codito, ergo sum - "I code, therefore I am" --------------
The Rasterman (Carsten Haitzler)    ras...@rasterman.com


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