Re: [osg-users] osgPPU CUDA Example - slower than expected?

2011-01-09 Thread Harash Sharma
3, 2011 3:30:34 PM Subject: Re: [osg-users] osgPPU CUDA Example - slower than expected? Hi, I don't have any other suggestions than to use a GL debugger to make sure nothing is going to CPU or to try the new CUDA functions in osgPPU or your own code. I remember something in the GL to CUDA stuff

Re: [osg-users] osgPPU CUDA Example - slower than expected?

2011-01-07 Thread Art Tevs
Hi Thorsten, the problem which you experience is because of lacking direct memory mapping between OpenGL and CUDA memory. Even if CUDA (at least it was in version 2 so) supports GPU-GPU memory mapping, whenever you access to OpenGL textures there is a full memory copy performed. I am not

Re: [osg-users] osgPPU CUDA Example - slower than expected?

2011-01-07 Thread Jason Daly
On 01/07/2011 03:34 PM, Art Tevs wrote: Hi Thorsten, the problem which you experience is because of lacking direct memory mapping between OpenGL and CUDA memory. Even if CUDA (at least it was in version 2 so) supports GPU-GPU memory mapping, whenever you access to OpenGL textures there is a

Re: [osg-users] osgPPU CUDA Example - slower than expected?

2011-01-07 Thread Thorsten Roth
Thanks for the answers. Actually I also know that there are new interoperability features in CUDA 3, but I didn't have the time to check them out yet, though if I find the time for it, I will let you know about the results :) Regards -Thorsten Am 07.01.2011 22:23, schrieb Jason Daly: On

Re: [osg-users] osgPPU CUDA Example - slower than expected?

2011-01-03 Thread J.P. Delport
Hi, I don't have any other suggestions than to use a GL debugger to make sure nothing is going to CPU or to try the new CUDA functions in osgPPU or your own code. I remember something in the GL to CUDA stuff bugging me, but cannot remember the details. AFAIR something was converting from

[osg-users] osgPPU CUDA Example - slower than expected?

2010-12-16 Thread Thorsten Roth
Hi, as I explained in some other mail to this list, I am currently working on a graph based image processing framework using CUDA. Basically, this is independent from OSG, but I am using OSG for my example application :-) For my first implemented postprocessing algorithm I need color and

Re: [osg-users] osgPPU CUDA Example - slower than expected?

2010-12-16 Thread Thorsten Roth
By the way: There are two CUDA-capable devices in the computer, but I have tried using the rendering device as well as the CUDA-only device - no difference! -Thorsten Am 16.12.2010 12:25, schrieb Thorsten Roth: Hi, as I explained in some other mail to this list, I am currently working on a

Re: [osg-users] osgPPU CUDA Example - slower than expected?

2010-12-16 Thread Thorsten Roth
Ok..I correct this: There is a difference of ~1 frame ;) ...now I will stop replying to my own messages :D Am 16.12.2010 12:31, schrieb Thorsten Roth: By the way: There are two CUDA-capable devices in the computer, but I have tried using the rendering device as well as the CUDA-only device -