OpenCL on Intel Core 2 duo CPU work group size

usmandastgeer · usmandastgeer #1 (**permalink**)

01-06-2011, 11:06 AM

Hello,

I am using Apple Macbook pro with NVIDIA Geforce 320M and Intel 2.66GHz core 2 duo and want to use opencl on CPU and GPU. it works fine except one problem while running OpenCL on CPU:
The work group size returned by OpenCL device query is 1 which means that there will be one thread in a thread block. So how could I do e.g. reduction operation and lot of other kernels where we need to have more work-items in a work-group even with CPU OpenCL implementation? Please tell me as I could not found any help on this??

Thanks in advance!

--
Usman.

usmandastgeer · usmandastgeer #2 (**permalink**)

01-10-2011, 01:53 PM

Anybody ??

usmandastgeer · usmandastgeer #3 (**permalink**)

01-11-2011, 12:30 PM

Hello,

I got Apple Macbook pro with NVIDIA Geforce 320M and Intel 2.66GHz core 2 duo with OS X 10.6 and want to use OpenCL on CPU and GPU.

It worked fine so far except one problem while running OpenCL on CPU:
The work group size returned by OpenCL device query is 1 which means that there will be one thread in a thread block. This is going to be a major problem as how could I do e.g. reduction operation and lot of other kernels where we need to have more work-items in a work-group even with CPU OpenCL implementation? Please tell me as I could not found any help on this??

Thanks in advance!

--
Usman.

bobtomay · bobtomay #4 (**permalink**)

01-11-2011, 12:56 PM

Note: Please do not crosspost. It won't really help. I would think without a single response in 5 days, there may not be anyone here that can help with this issue.

I would suggest you head for either the Apple or the nVidia developer forums with this question.

usmandastgeer · usmandastgeer #5 (**permalink**)

01-13-2011, 03:59 AM

Really sorry for that.

But this question is specific to Apple OpenCL so I could not get any answers from NVIDIA or from ATI OpenCL group.

bobtomay #4 (permalink)
Member Since: Dec 22, 2006 Location: Texas, where else? Posts: 21,794 Mac Specs: 15" MBP 2.33 C2D 256 4GB, MBA 13" i7 1.8, MB 2.0 2GB, Nano 4th, 3GS, iPad 1	01-11-2011, 12:56 PM Note: Please do not crosspost. It won't really help. I would think without a single response in 5 days, there may not be anyone here that can help with this issue. I would suggest you head for either the Apple or the nVidia developer forums with this question. I cannot be held responsible for the things that come out of my mouth. In the Windows world, most everything folks don't understand is called a virus. Place your vote for our Member of the Month
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OpenCL on Intel Core 2 duo CPU work group size

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usmandastgeer #1 (permalink)
Member Since: Jan 04, 2011 Posts: 5 Mac Specs: Macbook Pro 2.66 GHz Intel Core 2 Duo, 4GB RAM DDR3, Mac OS X (10.6.5), NVIDIA GeForce 320M	01-06-2011, 11:06 AM Hello, I am using Apple Macbook pro with NVIDIA Geforce 320M and Intel 2.66GHz core 2 duo and want to use opencl on CPU and GPU. it works fine except one problem while running OpenCL on CPU: The work group size returned by OpenCL device query is 1 which means that there will be one thread in a thread block. So how could I do e.g. reduction operation and lot of other kernels where we need to have more work-items in a work-group even with CPU OpenCL implementation? Please tell me as I could not found any help on this?? Thanks in advance! -- Usman.
	QUOTE Thanks

usmandastgeer #2 (permalink)
Member Since: Jan 04, 2011 Posts: 5 Mac Specs: Macbook Pro 2.66 GHz Intel Core 2 Duo, 4GB RAM DDR3, Mac OS X (10.6.5), NVIDIA GeForce 320M	01-10-2011, 01:53 PM Anybody ??
	QUOTE Thanks

usmandastgeer #5 (permalink)
Member Since: Jan 04, 2011 Posts: 5 Mac Specs: Macbook Pro 2.66 GHz Intel Core 2 Duo, 4GB RAM DDR3, Mac OS X (10.6.5), NVIDIA GeForce 320M	01-13-2011, 03:59 AM Really sorry for that. But this question is specific to Apple OpenCL so I could not get any answers from NVIDIA or from ATI OpenCL group.
	QUOTE Thanks

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