Exploring Single Source Shortest Path Parallelization on Shared Memory Accelerators

Abstract

Single Source Shortest Path (SSSP) algorithms are widely used in embedded systems for several applications. The emerging trend towards the adoption of heterogeneous designs in embedded devices, where low-power parallel accelerators are coupled to the main processor, opens new opportunities to deliver superior performance/watt, but calls for efficient parallel SSSP implementation. In this work we provide a detailed exploration of the Δ-stepping algorithm performance on a representative heterogeneous embedded system, TI Keystone II, considering the impact of several parallelization parameters (threading, load balancing, synchronization).