topic Re:DPCPP-SYCL cannot find GPU target from Python (Pybind11) in Intel® oneAPI DPC++/C++ Compiler

DPCPP-SYCL cannot find GPU target from Python (Pybind11)

Jonas5 — Thu, 16 Mar 2023 12:22:39 GMT

I have a simple Pybind11-binding:

#include <CL/sycl.hpp> #include <pybind11/pybind11.h> int foo(int a) { sycl::queue q(sycl::gpu_selector_v); sycl::buffer<int, 1> b(&a, sycl::range<1>(1)); q.submit([&](sycl::handler& cgh){ auto acc = b.get_access<sycl::access::mode::read_write>(cgh); cgh.single_task<class foo>([=](){ acc[0] +=1; }); }); //accessor auto acc = b.get_access<sycl::access::mode::read>(); return acc[0]; } PYBIND11_MODULE(test_binder, m) { m.def("foo", &foo); }

And a simple script to invoke:

import sys binder_path = "..." sys.path.append(binder_path) from test_binder import * print(foo(1))

The binder is built in a oneapi-sourced environment, and linked with:

-fsycl -sycl-std=2020 -std=c++20 -fsycl-unnamed-lambda -fPIC

(Cpp-executables built with the same flags are able to execute fine on the GPU.)

When running the `.py` script in the sourced environment, it works fine on the CPU. However, when openCL-devices are forced:

export ONEAPI_DEVICE_SELECTOR=opencl:*

I get the following error:

Traceback (most recent call last): File "...py", line 8, in <module> print(foo(1)) RuntimeError: No device of requested type available. Please check https://software.intel.com/content/www/us/en/develop/articles/intel-oneapi-dpcpp-system-requirements.html -1 (PI_ERROR_DEVICE_NOT_FOUND)

Is it possible to keep the OpenCL-device exposed through the compiled Python-binder?

(AOT-compiling with -fsycl-targets did not resolve the issue)

Re:DPCPP-SYCL cannot find GPU target from Python (Pybind11)

NoorjahanSk_Intel — Fri, 17 Mar 2023 12:44:35 GMT

Hi,

Thanks for posting in Intel Communities.

Could you please provide the detailed steps you have followed to build your code?

Also please provide the below details:

OS & Hardware details

The compiler version being used

Could you please let us know why you are using OpenCL devices?

Also please try with a level_zero device and let us know if you observe the same issue.

ONEAPI_DEVICE_SELECTOR=level_zero:gpu

Thanks & Regards,

Noorjahan.

Re:DPCPP-SYCL cannot find GPU target from Python (Pybind11)

NoorjahanSk_Intel — Fri, 24 Mar 2023 07:32:22 GMT

Hi,

As you want to close this thread as mentioned in internal notes, we are going ahead and closing this issue.

If you need any additional information, please submit a new question as this thread will no longer be monitored.

Thanks & Regards,

Noorjahan.