Cheers Robert, Sweet! I ran osgprerendercubemap --pbuffer - just as a preliminary test - and we're back up to > 60 fps - cheers....
Still doesn't explain why I only saw it with an SMP kernel - is it a threading issue...? Pete Robert Osfield wrote: > Hi Pete, > > Try using pbuffer rather than FBO, NVidia's Linux OpenGL drivers > handling of FBO'd cubemaps broke performance wise about six months > ago. Switch back to Pbuffer fixes the performance issue even though > it introduces a copy texture operation. > > Unfortunately I haven't yet exposed an option to View::setUpView*() to > allow one to require an pbuffer rather than a FBO. You could tweak it > by hand though and see how you get on. > > Robert. > > On Sat, Mar 1, 2008 at 3:55 PM, Pete Carss <[EMAIL PROTECTED]> wrote: >> 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 >> >> >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
