Towards an optimized distributed deep learning framework for a heterogeneous multi-GPU cluster

This paper presents a novel "Distributed Deep Learning Framework" for aheterogeneousmulti-GPU cluster that can effectively improve overall resource utilization without sacrificing training accuracy. Specifically, we employ a hybrid aggregation approach using a parameter-server and all-reduce schemes in order to address potential performance degradation problems in running deep learning applications on a heterogeneous computing system. In addition, we design and implement an asynchronous large mini-batch training mechanism to maintain training accuracy for asynchronous data-paralleled deep learning processing with enhanced collective communication capability based on MPI. We successfully implement our proposed framework on TensorFlow and perform extensive experiments in both of homogeneous and heterogeneous computing systems. Evaluation results show that our proposed framework can improve computing performance by decreasing I/O bottlenecks, and effectively increasing the resource utilization in the heterogeneous multi-GPU cluster.