Debugging using printf statements in SYCL code

Contributing to Blender
1

According the docs:

https://developer.blender.org/docs/handbook/new_developers/tips/

You could use printf statements yo debug your code. But in parts of the sources (cycles rendering) SYCL doesn’t work with printf statements. Does anybody have a good idea to work around this?

Thanx,

Michiel

2

Hi,
not sure you saw Brechts reply on the chat the other day:

We don’t have a printf mechanism for SYCL kernels. It seems sycl::stream exists for this purpose, but you’d have to figure out how to get it working.

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3

Thanx Thomas,

I was hoping someone could help me with a nice trick or something. I have no knowledge about SYCL and was hoping you could disable SYCL easily or set number of threads to one or…

Gr

Michiel

4

You can of course render on the CPU but if you want to render and debug on Intel GPUs, there is no way around SYCL.

5

I’m thinking; can blender be build without SYCL? Maybe some CMAKE/debug switch?

6

Disable WITH_CYCLES_DEVICE_ONEAPI to disable it

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