Using printf inside kernel code

[student4]

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.

[QM]

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. 

[HemanthCH_Intel]

Hi,

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

Thanks & Regards,

Hemanth

[HemanthCH_Intel]

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