topic Re:How oneAPI support parallel tasks on CPU? in Intel® oneAPI DPC++/C++ Compiler

How oneAPI support parallel tasks on CPU?

Roin — Fri, 04 Mar 2022 21:54:53 GMT

The task (kernel) is in SPMD format.

As I know for some OpenCL implementation, they execute SPMD kernel on CPU (MPMD architecture) by wrapping a whole block/work-group into a function, and using thread-pool to ask CPU cores executes these functions.

For example, for the given kernel:

a[tid]=b[tid];

will be converted to

for(int tid = 0; tid<block_size;tid++) a[tid]=b[tid];

Does oneAPI do the same transformation?

Thanks

Re:How oneAPI support parallel tasks on CPU?

NoorjahanSk_Intel — Mon, 07 Mar 2022 11:32:42 GMT

Hi,

Thanks for reaching out to us.

DPC++ includes SYCL, which is a higher-level abstraction layer that builds on OpenCL.

>>Does oneAPI do the same transformation?

Yes, OneAPI also follows the same transformation.

DPC++ follows the SPMD format while writing kernels.

Please refer to Data-Parallel C++ by James Reinders for more details.

Pdf page no:124 or Textbook page no:99

Please refer to the below link to find DPC++ oneAPI sample that follows SPMD format.

https://github.com/oneapi-src/oneAPI-samples

Thanks & Regards,

Noorjahan

Re:How oneAPI support parallel tasks on CPU?

NoorjahanSk_Intel — Mon, 14 Mar 2022 11:06:14 GMT

Hi,

We haven't heard back from you. Could you please provide an update on your issue?

Thanks & Regards,

Noorjahan.

Re:How oneAPI support parallel tasks on CPU?

NoorjahanSk_Intel — Mon, 21 Mar 2022 05:24:24 GMT

Hi,

We have not heard back from you, so we will close this inquiry now. If you need further assistance, please post a new question.

Thanks & Regards,

Noorjahan.