Re: [Chromium-users] no parallel speed up ?

[Brian P. <bri...@tu...>]

Smith, Ian wrote:
> Hi, 
> 
> Apologies if this is a rather naive query but I'm extremely new to chromium ...
> 
> I'm trying to see if I can use a Linux cluster to parallel rendering. I've
> tried the atlantis application with crdemo.conf and crdemo_full.conf but
> as far as I can see the full version with two tiles seems to produce the same
> frame rate as the single tile version with crdemo.conf. I've got the crserver's
> and the crappfaker running on separate nodes but the frame rate stays around
> 10 fps. I'm I missing something here ? Is there are bottleneck somewhere ?
> Are there any other demo's that can demonstrate an parallel speedup ???

You generally will only get a speed-up if you're doing sort-last 
compositing.  In that case, each of your rendering nodes will render 
subset of the whole scene, then the partial renderings will be combined 
with Z or alpha compositing.  Look at the binary swap examples.

But even then, you won't get a speed-up until you reach the point at 
which the benefit from parallelism exceeds the cost of network 
transmission and compositing.

-Brian