topic Re:Using printf inside kernel code in Intel® oneAPI DPC++/C++ Compiler

Using printf inside kernel code

student4 — Fri, 08 Apr 2022 08:35:49 GMT

Hi,

This screenshot is taken from Intel oneAPI Programming Guide(pg 44).

According to the documentation, printf can be used inside the kernel code for debugging.
But when I used inside my kernel code, it shows an error 'sycl kernel cannot call undefined function'.
q.submit([&](sycl::handler& h){
h.single_task([=]() {
printf
});
});

Appreciate your help.

Thank you.

Re: Using printf inside kernel code

QM — Fri, 08 Apr 2022 21:44:40 GMT

That's because you are not calling the function with right syntax. printf(...) is in cl::sycl::ext::oneapi::experimental namespace, you need to specify a namespace for an external function. I would recommend using sycl::stream for the ease of use.

Re:Using printf inside kernel code

HemanthCH_Intel — Tue, 19 Apr 2022 12:27:04 GMT

Hi,

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

Thanks & Regards,

Hemanth

Re:Using printf inside kernel code

HemanthCH_Intel — Tue, 26 Apr 2022 09:57:57 GMT

Hi,

We assume that your issue is resolved. If you need any additional information, please post a new question as this thread will no longer be monitored by Intel.

Thanks & Regards,

Hemanth