[osg-users] SMP and osgprerendercubemap on Linux

[Pete Carss]

Hello All,

I posted about this a couple of weeks ago, but didn't have much info.

I'm getting really poor framerates ( < 10 )from our software which is 
based on osgdistortion on a Core 2 Quad machine with a Quadro 3500 
running Ubuntu 7.10.

My P4 + Quadro 3450, and my Core 2 Duo + Quadro 1600M laptop run the 
software fine (also Ubuntu).

I upgraded the Core 2 Quad to Ubuntu 8.04 (to match the P4) and the 
problem went away. The other day I noticed that the Core 2 Quad could 
only see one of its cores - I upgraded to an SMP kernel, and the problem 
came back.

In the last 2 days I've been experimenting with Fedora + CCRMA - 
interestingly with an SMP kernel, it exhibits exactly the same 
behaviour. I don't see this behaviour under FreeBSD (6.2 and 7.0).

I see this behaviour with osgdistorion --dome, and also osgprerendercubemap.

I suspect that this is a Linux/SMP problem rather than an OSG problem, 
but I thought you guys might have seen this behaviour, or know 
workarounds...

Pete