Re: Responsiveness issue(s)
On Tue, 2007-04-10 at 21:17 -0400, Andrew J. Barr wrote:
>
> The kernel is a custom 2.6.20.6 kernel with preemption installed (I
> note that because it's not in the default powerpc kernel from etch).
Which kind of preemption? CONFIG_PREEMPT was traditionally known to be
problematic on PPC, though CONFIG_PREEMPT_VOLUNTARY seems fine here.
> - GNOME takes *forever* to start, from GDM on. Even the init scripts
> seem slow compared to my 1.6GHz Pentium M Thinkpad, but that could be
> because I have not installed upstart on this machine yet. This laptop
> has a 1.67GHz G4 in it, so it's no slouch. It should be faster than the
> Thinkpad, or at least on par, right? The first time I start Iceweasel
> and Icedove they take forever to start too, but it seems subsequent
> startups aren't nearly as bad.
The CPUs should be about on par, but the memory bandwidth on the
PowerBook is probably lower, and the HD speed might also be important.
> - The sound gets skippy on fairly innocuous things like scrolling or tab
> switching in Iceweasel. I am using Compiz, but this is hardware
> accelerated and Xorg isn't using CPU like it is doing these effects in
> software.
At least the 2D parts of it (i.e. the actual application window
contents, as opposed to the final compositing done by compiz) are most
likely done in software actually.
--
Earthling Michel Dänzer | http://tungstengraphics.com
Libre software enthusiast | Debian, X and DRI developer
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