Re: [osg-users] [osgPPU] Perfomance issues with PBO for input textures

2012-02-28 Thread Art Tevs
Hi Shahar, I would say that this is expected behaviour. This is due to the case, that the texture has to be copied from the GPU memory to the CPU memory. With PBOs this should be done through DMA or somehow directly without involving CPU for this, however the PCIe bus is the bottleneck here. I

[osg-users] [osgPPU] Perfomance issues with PBO for input textures

2012-02-28 Thread Shahar Kosti
Hi, I'm new to osgPPU and OSG in general, so please bear with me :) I'm trying to use the built-in mechanism in osgPPU::Unit for copying the rendered textures to the CPU. I'm using a simple tester based on one of the osgPPU, and my initialization code is structured like this: Code: // Somewher