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- ATI OPENCL DRIVER BUG DETECTED GPU Z DRIVERS
- ATI OPENCL DRIVER BUG DETECTED GPU Z UPDATE
- ATI OPENCL DRIVER BUG DETECTED GPU Z CODE
ATI OPENCL DRIVER BUG DETECTED GPU Z CODE
So, moral of the story is that you need to write different OpenCL code for AMD GPUs and NVIDIA GPUs. Just look at a DOT product between 2 FLOAT4 operands… When you write vectorized OpenCL code, the compiler will find it easy to encode the entire vector operation into 1 VLIW instruction. This is inspired from the graphics world where each pixel has R,G,B and Alpha components in them. For example: x = a b + de + f g + hi – can possibly be encoded in a single instruction. Programmers use shared memory and sycnhronization whenver they want to share data among threads.ĪMD too follows a similar programming model… But AMD hardware uses a 5-way VLIW pipe… meaning – Each VLIW instruction executed by AMD hardware (hardware thread) can encode operations to 5 different execution units. The thread is the most basic entity and it usually corresponds to one scalar data-item in the data-parallel-model (that is how we write programs). There is 2 levels of parallel decomposition. NVIDIA uses a block of threads and grid of blocks programming model. Somewhere between Slides 24 to 28, you will find 2 diffrent implementations of the coulomb summation kernel… Its a nice lecture that you may find useful. Usually developers develop OpenCL code optimized for a particular platform.Ĭheck John Stone’s Presentation… Just google “John Stone UIUC OpenCL CUDA coulomb summation”. the OpenCL code will work on both AMD and NVIDIA and other OpenCL platforms. Just wanted to know if Nvidia will have this performance with a software/bios update/tweak in a future or if it’s just a hardware limitation. There is a big difference and the 560 ti it’s a better card (at least for Gaming). One ATI radeon 5850 at 275Mhash/s (OpenCL 1.1 with AMD APP 2.4)Īnd my Nvidia 560 ti at 79Mhash/s (CUDA with CUDA 4.0 270.61 drivers) or… 65Mhash/s (OpenCL 1.0 with Nvidia 270.61).
ATI OPENCL DRIVER BUG DETECTED GPU Z UPDATE
Seeing all the energy going into promoting CloseDA, i fear whatever reasons they once had to promote ocl have vanished.īut there will be a way to reach the ATI OpenCL performance (With future Software upgrades / Bios update etc etc)? Or Nvidia cards are just shorter in hardware to reach that speed “In opencl”? It would be bad if NVIDIA decided to drop ocl anyhow, i guess that would be pretty much the death of it. The next weeks im gonna try out my software on a bunch of amd firepros using their latest ocl 1.1 driver, guess there’ll be a few steppin stones with amd too - but as long as i can develop for 1.1, ill be ok. But i don’t think 1.1 will “simply” speed up your code by 3x. From 20 Kernels on upwards it becomes hell to count and note the used private bytes in each kernel by hand, and do so again for each change. In my case its more about maintainance that i want ocl 1.1. The improved multithreading should also come in handy. What i am looking for is mainly the ability to query kernel/device for their private-memory-needs and the ability to do region-based r/w/c to image-buffers. Check the differences between 1.0 and 1.1 on some dude’s blog. As for NVIDIA’s commitment to OpenCL, it’s pretty frustrating that their support is less than enthusiastic (bordering on non-existent?) - if you prefer OpenCL just vote with your dollars - you can get a decent AMD card for a couple hundred that nicely supports OpenCL (and 1.1 at that) out of the box.
ATI OPENCL DRIVER BUG DETECTED GPU Z DRIVERS
What versions are you using? I haven’t had any problems with AMD/ATI drivers lately, actually I find the OpenCL support is really nice, you can debug on the processor and then run on the card. So please, release us from this torment :) On the other hand ATI drivers tend to crash all the time so our only choice is to carefully pick the NVIDIA cards that do have beta driver support if we want to use OpenCL 1.1. It’s getting tedious to search for a NVIDIA GPU with OpenCL 1.1 support. Obviously as they are kinda old fermi cards we kind of assumed automatically that the beta drivers would work with it. As an example we just bought a gtx460 for a new computer. I completely agree that NVIDIA is taking way too much time on releasing official OpenCL 1.1 drivers, or at least new beta drivers which would support their current (or older) lineup.