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ligen
Adept I

Is there are any way to make global memory of APU larger?

I use AMD E350 APU to develop an opencl program, however, I found the max global memory size is only 192MB. In my opinion, the GPU core and CPU core in APU have a shared physical memory,and  the max global memory of GPU core should be equal to whole physical memory. Is the 192MB a hard line? or the size of global memory can be tuned?

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nou
Exemplar

Even that it is same memory they are still separated. Size of GPU memory is setted with BIOS so you can try find it in BIOS settings.

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5 Replies
nou
Exemplar

Even that it is same memory they are still separated. Size of GPU memory is setted with BIOS so you can try find it in BIOS settings.

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thanks,nou. you are right. there is an option in my efi bios to enable to adjust the size of gpu memory. and  i found if the graphic memory is 1gb, global memory will be half (512mb). whatever, it works.

you can experiment with enviroment variable GPU_MAX_HEAP_SIZE you can set it 0-100. it set percentage of GPU memory what can be allocated.

Perfect, It's works, I can use whole GPU memory now!  Thank you!

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