Hi Robert, I understand that looking for a 100% of CPU usage is not a good goal, but our application goes around 15fps and the CPU still remain using 50% ... so we can't use big scene... I don't know were to find the bottleneck... or how to search it...
The strange thing is that month or years ago, we were using 100% of the CPU ... we made a lot of changes, but are there somme osg updates or classes changes that can have modified this behavior ? (i.e. compositeViewer, threading model, etc...) Thanks. Regards, Vincent. 2009/7/17 Robert Osfield <[email protected]> > Hi Vincent, > > With graphics applications the load is taken up between the disks, > memory, buses, CPU cores, CPU caches, GPUs, etc. any one of this might > be the bottleneck at any one time. Which is most likely to be a > bottleneck will depend on the nature of your application, the type of > scene you have, the OS, the OpenGL drivers, the graphics card, the > motherboard etc. > > It's nothing unusual to be maxed out your system yet still not full > utilise an single resource such as CPU cores. What you are actually > trying to achieve with a graphics application is to tread lightly but > still achieve your goals, i.e. keep the whole system comfortably > handling the load but still hitting your required frame rate. > > So rather than try to max out CPU utilisation you should be looking at > whether your application hits the required frame rates with your > required models and then to look at the bottlenecks if it doesn't > achive this. Looking at maximizing CPU utlisation is a false goal, > you need to ditch it right away and start focusing on what will > provide your end users with the best experience possible. > > Robert. > > On Fri, Jul 17, 2009 at 8:58 AM, Vincent > Bourdier<[email protected]> wrote: > > Hi all, > > > > Looking for benchmark for our application, we just saw that the processor > > usage never goes up to 50% (on dual cores). > > I set the vsync to false in my graphic card drivers, but no way... the > > processor never use more than one core. This is not good for our > > application, because we would like to use the whole processor capacity to > > manage huge scene. > > > > We use the DrawThreadPerContext mode, so I do not understand why we do > not > > use the whole computer power. > > > > Thanks for help. > > > > Regards, > > Vincent. > > > > _______________________________________________ > > 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
