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1250 MHz and 32 units/coresĭevice 1 is an: GPU with max. Silly assumption in hindsight.ĭevice 0 is an: GPU with max. When I first heard about OpenCL I always kind of assumed it would be more likely to use the one you weren't using for graphics at the time. I wonder if this is like the 6GB RAM limit on these machines? The 9400M is the one I happen to be switched to using for graphics. :) Validate test passed - GPU results=CPU results :) Now checking if results are valid - please be patient. OpenCL Device # 1 = Intel(R) Core(TM)2 Duo CPU T9400 2.53GHzĭevice 1 is an: CPU with max. time results are not comparable to older version!. On the plus side, they include the source for the AOBench stuff, and the XCode project, so you can fiddle with it and see how OpenCL code is written. Unfortunately when I try to run it against the GPU, it gives the following error:Įrror: Failed to build program executableĬvmsErrorCompilerFailure: LLVM compiler has failed to compile a function. Interesting that the CPU beats the 4870 on the Pro!

OpenCL Device # 0 = Intel(R) Core(TM)2 CPU T7400 2.16 GHzĭevice 0 is an: CPU with max. OpenCL Device # 1 = Intel(R) Xeon(R) CPU W3540 2.93GHzĭevice 1 is an: CPU with max.

Ok,this was just run on my 2009 Mac Pro, 2.93 Ghz Quad w/HT ON + 4870 GPU:ĭevice 0 is an: GPU with max. Intel Core 2 Duo 2.40GHz: 15.459 secondsĬombining all three processors at once could theoretically deliver substantial performance improvements to the right application.įinally, another floating point benchmark application called AO Bench has also been ported to OpenCL and can also show the difference between CPU and GPU performance in some configurations.Īrticle Link: OpenCL Benchmarks and Support for Both MacBook Pro GPUs In this particular example, the benchmark performance of the user's MacBook Pro CPU and two discrete GPUs were as follows (smaller numbers faster): In contrast, both of these GPUs can not be used for general graphics processing and requires a Mac OS X logout to switch from one to another. Most interesting is that for owners of high end MacBook Pros which contain both 9400M and 9600M GT graphics cards, both GPUs can be used at any time by OpenCL. The benchmark runs on each device showing the relative performance. NVIDIA GeForce 9400M, GeForce 9600M GT, GeForce 8600M GT, GeForce GT 120, GeForce GT 130, GeForce GTX 285, GeForce 8800 GT, GeForce 8800 GS, Quadro FX 4800, Quadro FX5600 The current list of OpenCL supported GPUs include: Forum user J the Ninja, however, points to a recently released OpenCL Benchmark application that tests the speed of the various OpenCL capable devices in your Mac.

Unfortunately, there have been few apps that have been released that properly demonstrate the potential of OpenCL.

This would allow powerful graphics cards (GPUs) to do more general processing and could improve application performance substantially. OpenCL is a framework that allows applications to more easily harness the power of multiple GPUs and CPUs found in your computer. With the release of Mac OS X Snow Leopard, we're getting our first look at the possibilities behind Snow Leopard's OpenCL technology.