How to use multiprocessing and data parallelism together?

Hello, thank you for reading my writing.

I am now studying on multiprocessing.

What I want to do is load data from multiple data loaders and It supplies data to the queue using multiprocessing.

The reason for creating multiple data loaders is that each has a different image size and batch size.

The question here is, is it an error to see if dataparallel crashes after creating a process for the data loader?

Thank you.