Hi Marco, On Fri, Mar 28, 2008 at 5:52 PM, Marco Jez <[EMAIL PROTECTED]> wrote: > Hi everybody, long time no see!
Welcome back ;-) > The good news: little changes were needed to make my apps compile with OSG > 2.3. The bad news: the same apps now consume much more RAM, and they also > run slower. In brief, here are the results for one of my largest > applications (with lots of compressed DDS textures): > > Compiler: Visual C++ 7.1 > OSG+OpenThreads: 1.2 > Total RAM usage: 380 MB > Frame rate (reference view): 30 FPS > > Compiler: Visual C++ 9.0 > OSG+OpenThreads: 1.2 > > Total RAM usage: 380 MB > Frame rate (reference view): 27 FPS > > > Compiler: Visual C++ 9.0 > OSG+OpenThreads: latest SVN (2.3.6) > > Total RAM usage: 760 MB > Frame rate (reference view): 23 FPS > > The OS is Windows XP Professional SP2. > In all tests, VSync was ON, and the refresh rate was 75 Hz. The test scene > doesn't contain any paged LODs. > > This is only a quick report, more details to come. Before I try to > understand what's going on, is there anything that I might have overlooked, > as for example any optimizations whose default values have changed since OSG > 1.2? Check the CMake build options for release vs debug. The other possibility is the default enabling of theadsafe ref/unref for the majority of scene graph objects. I certainly don't see big differences under Linux with enabled - just a couple of percent in cull traversal for big scenes, but you never know the Windows OpenThreads::Mutex might be dog slow compared to Pthreads. You can enable threadsafe ref/unref in 1.2 and find out, its more awkward to disable under 2.x though as a number of objects explicitly set the thread safe ref/unref. The wider use of thread safe ref/unref is what you have to pay for greater stability when multi-threading, and with 2.x threading is much more prevalent once you start using osgViewer. The new threading models should mean you should get better performance once you start utilising them. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
