Symbolic Representation of Layer-wise Parallelism

A large neural network decoder, consisting of 12 sequential processing blocks, is distributed across 12 separate workers, with each worker assigned exactly one block. For a single input, the computation proceeds sequentially through the workers from 1 to 12 during the forward pass, and then in reverse from 12 to 1 during the backward pass. What is the primary factor limiting the overall computational efficiency of this specific arrangement?

A 3-block neural network decoder is distributed across 3 workers using layer-wise parallelism, with each worker responsible for one block (Worker 1 has Block 1, Worker 2 has Block 2, and Worker 3 has Block 3). For a single training iteration, arrange the following computational events in the correct chronological order.

GPU Utilization in a Distributed System