Re: [osg-users] OpenCL: democracy for GPU computing?
Interoperability (in terms of being able to copy data directly between analogous OpenGL and OpenCL buffers) is a feature of the new OpenGL 3.1. Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com +1 303 859 9466 -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of hanne...@gmx.at Sent: Thursday, March 19, 2009 7:21 PM To: OpenSceneGraph Users Subject: [osg-users] OpenCL: democracy for GPU computing? http://www.behardware.com/articles/744-1/opencl-democracy-for-gpu-computing. html thoughts? ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OpenCL: democracy for GPU computing?
Martin Beckett wrote: Following OpenGL3 I'm not holding my breath for a standard developed by Khronos. It was actually developed by Apple, who submitted it to the Khronos Group (although they probably fiddled with the original spec, of course). The bit about OpenCL not just being for GPUs but also for CPUs and Cell worries me - it sounds like a 'grand plan' - it supports manufacturers extentions so if you have an OpenCL app that needs Nvidia extentions why not just use Cuda? Finally are there any real competitors to Nvidia in this space? Are you about to run heavy weight physics simualtions on an embedded Intel chipset? Would you rather be forced to always use NVidia's stuff through Cuda than possibly have the option of using a different backend through OpenCL? Only time will tell if there are going to be serious competitors, of course... Paul ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OpenCL: democracy for GPU computing?
On Fri, Mar 20, 2009 at 4:57 AM, Martin Beckett m...@mgbeckett.com wrote: Following OpenGL3 I'm not holding my breath for a standard developed by Khronos. The bit about OpenCL not just being for GPUs but also for CPUs and Cell worries me - it sounds like a 'grand plan' - it supports manufacturers extentions so if you have an OpenCL app that needs Nvidia extentions why not just use Cuda? Finally are there any real competitors to Nvidia in this space? Are you about to run heavy weight physics simualtions on an embedded Intel chipset? We'll have to see what happens with ATI's and Intel's OpenCL implementation. Supporting extensions/some code specifics is far better than doing work having to do everything in completely proprietary API's as more of your work will be reusable. The OSG itself uses lots of OpenGL extensions but it hasn't become a great problem for maintenance or development - the OSG still supports OpenGL 1.1 hardware as it does OpenGL 2.1 + extensions hardware. This does suggest that it won't be a show stopper that OpenCL has extensions and that we might need to use them occassionally to get best out of particular hardware platform. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OpenCL: democracy for GPU computing?
Yes I would much prefer a cross platform well supported API than be forced to buy NVidia (and have to tell my customers to). But at the moment a lot of the OSG demos do not render properly on any other cards (at least on Windows) just because of the poor OpenGL drivers - so I'm not holding my breath for them to all correctly implement the OpenCL spec. If GPGPU is going to become mainstream then we do need something like OpenCL (else DirectX will do it!). At the moment it doesn't matter - the application is generally so specialised that requiring a particular board isn't a problem. But an industry wide spec for something which is technically complex and only used in niche areas needs a strong driving force behind it. OpenGL really took off because of SGI not a loose industry-wide steering group. Still - you never know it might all work out :-) -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=8862#8862 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] OpenCL: democracy for GPU computing?
http://www.behardware.com/articles/744-1/opencl-democracy-for-gpu-computing.html thoughts? ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
