opencl

I was perusing http://www.khronos.org/ web site and only found headers for OpenCL (not OpenGL which I don't care about). How can I obtain OpenCL SDK? AMD's ATI Stream SDK works perfectly for me and it uses multicore cpu's. I have an Intel CPU and an NVIDIA card but it works with using the CPU. Just registration is required and no special selection like Nvidia requires: http://developer.amd.com/GPU/ATISTREAMSDKBETAPROGRAM/Pages/default.aspx I got it to work in ubuntu 9.04. Just download the installation instruction PDF:s also available on that page and it should work. There isn't a Khoronos

Your CPU may be a quad-core, but did you know that some graphics cards today have over 200 cores? We've already seen what GPU's in today's graphics cards can do when it comes to graphics. Now they can be used for non-graphical tasks as well, and in my opinion the results are nothing short of amazing. An algorithm that lends itself well to parallelism has the potential to be much, much faster on a GPU than it could ever be on a CPU. There are a few technologies that make all of this possible: 1.) CUDA by NVidia. It seems to be the most well-known and well-documented. Unfortunately, it'll only

One thing I haven't figured out and google isn't helping me, is why is it possible to have bank conflicts with shared memory, but not in global memory? Can there be bank conflicts with registers? UPDATE Wow I really appreciate the two answers from Tibbit and Grizzly. It seems that I can only give a green check mark to one answer though. I am newish to stack overflow. I guess I have to pick one answer as the best. Can I do something to say thank you to the answer I don't give a green check to? Short Answer: There are no bank conflicts in either global memory or in registers. Explanation: The

I'd like to hear from people with experience of coding for both. Myself, I only have experience with NVIDIA. NVIDIA CUDA seems to be a lot more popular than the competition. (Just counting question tags on this forum, 'cuda' outperforms 'opencl' 3:1, and 'nvidia' outperforms 'ati' 15:1, and there's no tag for 'ati-stream' at all). On the other hand, according to Wikipedia, ATI/AMD cards should have a lot more potential, especially per dollar. The fastest NVIDIA card on the market as of today, GeForce 580 ($500), is rated at 1.6 single-precision TFlops. AMD Radeon 6970 can be had for $370 and

Have there been any studies comparing OpenCL to OpenMP performance? Specifically I am interested in the overhead cost of launching threads with OpenCL, e.g., if one were to decompose the domain into a very large number of individual work items (each run by a thread doing a small job) versus heavier weight threads in OpenMP were the domain was decomposed into sub domains whose number equals the number of cores. It seems that the OpenCL programming model is more targeted towards massively parallel chips (GPUs, for instance), rather than CPUs that have fewer but more powerful cores. Can OpenCL be

What features make OpenCL unique to choose over OpenGL with GLSL for calculations? Despite the graphic related terminology and inpractical datatypes, is there any real caveat to OpenGL? For example, parallel function evaluation can be done by rendering a to a texture using other textures. Reducing operations can be done by iteratively render to smaller and smaller textures. On the other hand, random write access is not possible in any efficient manner (the only way to do is rendering triangles by texture driven vertex data). Is this possible with OpenCL? What else is possible not possible with

I'm implemented a Binary-Search-Tree in C code. Each of my tree nodes looks like this: typedef struct treeNode { int key; struct treeNode *right; struct treeNode *left; } treeNode_t; The construction of the Tree made by the Host. The query of the tree made by the device. Now, let's assumed that I'm already finished building my Tree in host memory. I'm want to copy the root of my tree to the memory of my device. Copying the root of the tree it self isn't enough. Because the right \ left child isn't located in the device memory. This is a problem. So, my question is what is the easiest way to