SWiF: A Simplified Workload-Centric Framework for FPGA-Based Computing

In this paper, we introduce SWiF - Simplified Workload-intuitive Framework - a workload-centric, application programming framework designed to simplify the large-scale deployment of FPGAs in end-to-end applications. SWiF can intelligently mediate access to shared resources by orchestrating the distribution and scheduling of tasks across a heterogeneous mix of FPGA and CPU resources in order to improve utilization and maintain system requirements. We implemented SWiF atop Intel Accelerator Abstraction Layer (AAL) and deployed the resulting software stack in a datacenter with an Intel-based Xeon+FPGA server running Apache Spark. We demonstrate that by using SWiF's API, developers can flexibly and easily deploy FPGA-enabled applications and frameworks with almost no change to existing software stack. In particular, we demonstrate that by offloading through SWiF the compression workload of Spark unto FPGA, we gain a speedup of 3.2X in total job execution, and up to 5X when Spark's Resilient Distributed Datasets (RDDs) are persisted in memory.