[Bf-committers] Fwd: Blender 2.28(a) and kernel 2.6.0-test(x) starvations

[John K. Walton]

it sounds like the same symptoms i have had with some MIPS
CPU on some machines. like to O2 problem, and recently
resurrected indigo2 extreme,elan  et al graphics.

On Mon, 25 Aug 2003, Ton Roosendaal wrote:

> Hi Linuxers,
> 
> No idea what CPU starvation is... reading the first link below, it  
> looks like Ghost is pushing X11 too much?
> 
> Experts, please investigate!
> 
> -Ton-
> 
> 
> 
> Begin forwarded message:
> 
> > From: Voluspa <lista1@comhem.se>
> > Date: Sun Aug 24, 2003  12:29:02 Europe/Amsterdam
> > To: ton@blender.org
> > Subject: Blender 2.28(a) and kernel 2.6.0-test(x) starvations
> >
> >
> > Greetings,
> >
> > Modern versions of blender does a "busy on wait" that starves the CPU
> > scheduler in linux kernels (most prominently in the 2.6 series) Con
> > Kolivas, who is working on interactivity improvements, found this:
> >
> > _[RFC] Re: Blender profiling-1 O16.2int_
> > http://marc.theaimsgroup.com/?l=linux-kernel&m=106112730426898&w=2
> >
> > His work has improved blender behaviour significantly (from my simple
> > test point of view) and I posted a review:
> >
> > _Re: [PATCH]O18.1int_
> > http://marc.theaimsgroup.com/?l=linux-kernel&m=106167666627190&w=2
> >
> > However, downloading your latest 2.28a and looking for starvation signs
> > I changed the 'playing' field a bit. Using the menu buttons and eg
> > "Toggles the perspective mode" to something else than the original,  
> > then
> > doing a slow "world plane" rotate, the starvation is back...
> >
> > Tried it with 2.28 as well and can indeed toggle starvation by toggling
> > things on the menu buttons. It is harder to trigger in 2.28 than 2.28a
> > somehow.
> >
> > Mvh
> > Mats Johannesson
> >
> >
> ------------------------------------------------------------------------ 
> --
> Ton Roosendaal  Blender Foundation ton@blender.org  
> http://www.blender.org
> 
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