Hi Guys, I've been done a few basic benchmarks today and was stunned to find far lower performance than on my older and slower quad core system, the cull and draw traversals being far longer. I've traced the problem back to cmake's release build options being blank on this machine - so release build was build without the usual -O3 option in place. I'm currently doing a rebuild to see what happens with manually putting -O3 in the CMAKE_CXX_FLAGS_RELEASE entry.
The cmake version which I grabbed from the Kubuntu 8.10 repositories is cmake 2.6-patch 0, which on my older system I had compiled and and installed 2.6 path 1. I don't know yet whether this makes the difference. I'll go investigate on my other 8.10 systems. My quick look at benchmarking also hinted that hyper threading may be hurting performance, or at least the current CPU affinity strategy employed by osgViewer may be hurting performance on a hyper threading CPU. Until I get an optimitized build running I can't go investigate further. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
