def _recv_backward()

in dualpipe/dualpipev.py [0:0]

• 8 lines of code
• 7 McCabe index (conditional complexity)

    def _recv_backward(self, phase: int) -> None:
        if self.forward_only:
            return

        if (self.is_first_rank and phase == 1) or (self.is_last_rank and phase == 0):
            return

        self.current_recv_b_chunk_id[phase] += 1
        tensors = comm.append_irecv(self.comm_ops, self.next_rank if phase == 0 else self.prev_rank, self.group)
        self.output_grad_chunks[phase].append(tensors)