[prev in list] [next in list] [prev in thread] [next in thread] 

List:       kde-bugs-dist
Subject:    [Bug 246084] Scrolling in Firefox and Konqueror (even rendering of
From:       Thomas Lübking  <thomas.luebking () web ! de>
Date:       2010-11-11 13:17:55
Message-ID: 20101111131755.1298F740C1 () immanuel ! kde ! org
[Download RAW message or body]

https://bugs.kde.org/show_bug.cgi?id=246084





--- Comment #8 from Thomas Lübking <thomas luebking web de>  2010-11-11 14:17:52 ---
(In reply to comment #7)
> During compilation of some application from source, all the interface becomes
> unusablel, scrolling is very and very choppy and slow, visual repaint of all

are you using indirect rendering?!

> The kwin compositing mode causes a much performance damage (although it should
> be opposite).
false assumption. the GL_texture_from_pixmap conversion is a significant
overhead. use the XRender backend where this is not required (and current
nvidia drivers provide acceptable scaling performance)

> affect the battery life. Of course, in theory, the compositing mode should
> shift the burden from the CPU to the GPU,
no. opengl is NOT the native X11 format, thus there must be a conversion, this
causes an overhead which is balanced between the GPU and the CPU depending on
your HW/Drivers and the kwin/X11 process depending on whether you use direct or
indirect rendering.

> but in practice it load booth devices, and when one of them (CPU in my case) is
> busy by other processes, kwin compositing becomes unable to work properly.
sounds A LOT like indirect rendering (or an indirecting effect like sharpen
-stupid idea cause the nvidia driver can do that anyway w/o overhead- or
blurring)

regarding compilation & cpu load: "man:nice", in doubt: 'alias make="nice
make"'

-- 
Configure bugmail: https://bugs.kde.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching all bug changes.
[prev in list] [next in list] [prev in thread] [next in thread]