plasma on thinclients / poor performance

[Aaron J. Seigo]

On Tuesday 21 October 2008, Martin Vogt wrote:
> The thinclients are not that old,
> but usually do not support GLX/OpenGL.

that's fine; what sort of graphics cards and drivers are in them? 

> Basically, what I see, is:
>
> -A _poor_ performance of KDE 4.1.2 on thinclients.
>
> Example1:
>
> -Dragging the "transparent desktop Folder" (the one with
> the Icons in it) ==> not very responsive/interactive.

sounds like a painting efficiency issue, which could either be "too many server 
roundtrips" or "poor xrender acceleration in the driver" or perhaps something 
else even.

> Example2:
>
> -System Settings->Desktop->Click on multiple desktops->21..22..23
>  Dialog opens.(2-3 seconds)
> -System Settings->Click window behavior 21,22,23 dialog opens
> -Click tab "tilebar actions" 21,22,23 dialog opens.
> etc...

this has absolutely nothing to do with plasma, of course, and there are so 
many parts of the framework involved here that it's hard to know what is 
causing the issues without some profiling.

> Does plasma/KDE 4.X gets some testing on thinclients?

if you're asking whether or not anybody develops kde on a thin client, i don't 
think so. and we don't have test labs either; we rely on downstream for data 
on these kinds of things.

> The remote hosts was a 2GB 2core system, with load around 0.3%.
> The thinclients do handle KDE 3.5.x very well.

3.5 is a very different animal than 4.x.

something to try: in the kdeglobals config, try putting this:

[KDE-Global GUI Settings]
GraphicEffectsLevel=0

that should kill all the animations (though unfortunately not all the 
gradients .... still need to work on that) and make things work a bit faster.

-- 
Aaron J. Seigo
humru othro a kohnu se
GPG Fingerprint: 8B8B 2209 0C6F 7C47 B1EA  EE75 D6B7 2EB1 A7F1 DB43

KDE core developer sponsored by Qt Software

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 197 bytes
Desc: This is a digitally signed message part.
Url : http://mail.kde.org/pipermail/plasma-devel/attachments/20081021/05ab0852/attachment.sig