Under Snow Leopard, when I tried any of the following cards in a Mac Pro
Westmere, the only OpenCL devices reported by QC was the Intel CPU (although
there were 12 CPUs reported, hence the hyper threading was working ).
The cards I tried were:
ATI 5870
ATI 5770
Nvidia Quadro 4000 for Mac
( which did run CUDA on the Mac, for certain MATLAB licenses )
There was a discussion that OpenCL support, and QC use of OpenCL were not the
same, but to be honest, this seems like splitting hairs to me. I was
disappointed with Apple's Hype for OpenCL support, relative to the engineering
reality of trying to use OpenCL in Quartz Composer.
What does it mean for a card to support OpenCL if when using the OpenCL
development tool, the card is not part of the implementation?
-- Glen
On Jul 23, 2011, at 8:40 PM, Alastair Leith wrote:
> A GPU card's support for OpenCL in OS X applications is not same thing as
> support for OpenCL patches inside Quartz Composer environment if I recall
> correctly. Somebody please fill in gaps/correct if I'm wrong.
>
>
>
> On 24/07/2011, at 6:36 AM, Paul Harrison wrote:
>
>> I have constructed a simple .qtz composition using OpenCL Context Info patch
>> which reports that my iMac has an OpenCl
>> Device Count of 1,
>> Device Type of CL_DEVICE_CPU, and
>> Name of "Intel(R) Core(TM) i& CPU 860 @ 2.80GHz.
>>
>> But, the iMac'a system info reports under Graphics/Displays that it also
>> sports an
>> ATI Radeon HD 4850:
>> Chipset Model: ATI Radeon HD 4850
>> Type: GPU
>> Bus: PCIe
>> PCIe Lane Width: x16
>> VRAM (Total): 512 MB
>> Vendor: ATI (0x1002)
>> Device ID: 0x944a
>> Revision ID: 0x0000
>> ROM Revision: 113-B9110C-425
>> EFI Driver Version: 01.00.383
>>
>> And the Apple website http://www.apple.com/macosx/specs.html says:
>>
>> "OpenCL
>> requires one of the following graphics cards or graphics processors:
>>
>> NVIDIA GeForce 320M, GeForce GT 330M, 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
>> ATI Radeon HD 4670, ATI Radeon HD 4850, Radeon HD 4870, ATI Radeon HD 5670,
>> ATI Radeon HD 5750, ATI Radeon HD 5770, ATI Radeon HD 5870
>> AMD Radeon HD 6750M, AMD Radeon HD 6770M, AMD Radeon HD 6970M"
>>
>> Seeing as how the official apple list of OpenCL supported graphics
>> processors lists ATI Radeon HD 4850 and my machine reports having an ATI
>> Radeon HD 4850 installed, why does Quartz Composer (version 4.0 103.1) not
>> report it in the OpenCL Context Info?
>>
>> The machine is running Mac OS X Version 10.6.8.
>>
>> Paul
>>
>>
>>
>>
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>
> The machine does not isolate man from the great problems of nature but
> plunges him more deeply into them.
> Antoine de Saint-Exupery
>
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