topic Re: Number of Compute Unites in i.MX6Q GC2000 GPU in i.MX Processors

Number of Compute Unites in i.MX6Q GC2000 GPU

jake3 — Wed, 24 Mar 2021 14:58:05 GMT

Hello!

I'm doing some investigation on the GC2000 GPU of the i.MX6Q using the Sabre board.

After flashing the BSP from L5.4.70-2.3.0_images_MX6QPDLSOLOX, I'm able to use the clinfo utility to output the information about the GC2000.

However, clinfo is only showing 1 for CL_DEVICE_MAX_COMPUTE_UNITS, as shown in the image attached.

Did I miss anything? Shouldn't that be 4 for CL_DEVICE_MAX_COMPUTE_UNITS?

Bio_TICFSL — Mon, 29 Mar 2021 14:23:56 GMT

Hello jake3,

The CL_DEVICE_MAX_COMPUTE_UNITS refers to the processor GPU that can process OpenCL in this case 1. if you tested the MX8MQ you will receive 4.

Regards

jake3 — Mon, 29 Mar 2021 16:40:24 GMT

@Bio_TICFSL, thank you for your reply!

However, what you have mentioned doesn't match with the stats shown in the i.MX_Graphics_User's_Guide_Linux.pdf document.

The i.MX6Q has GC2000 GPU, which has the following stats in the document. There are 4 shader cores and each shader core has 4 processing elements.

And for i.MX8MQ, there is 1 shader core and that shader core contains 16 processing elements.

From the processing elements' point of view, both i.MX6Q and i.MX8MQ have 16 PEs. How come the CL_DEVICE_MAX_COMPUTE_UNITS is different?

Shouldn't CL_DEVICE_MAX_COMPUTE_UNITS be 4 for i.MX6Q since it has 4 shader cores, and 1 for i.MX8MQ since it has 1 shader cores?

Thank you!