Hey @LW-Ricarido, sorry about the delay.
If you use regular Python functions as RPC target, multiple requests cannot run in parallel on the callee side due to Python Global Interpreter Lock (GIL). To avoid the lock, you can convert your function into a TorchScript function by adding a @torch.jit.script decorator. Some examples are available here 1, please search for @torch.jit.script.
This is a more thorough doc for TorchScript.
Example tests can be found here.