On the Portability of the OpenCL Dwarfs on Fixed and Reconfigurable Parallel Platforms

The proliferation of heterogeneous computing systems presents the parallel computing community with the challenge of porting legacy and emerging applications to multiple processors with diverse programming abstractions. OpenCL is a vendor-agnostic and industry-supported programming model that offers code portability on heterogeneous platforms, allowing applications to be developed once and deployed "anywhere." In this paper, we use the OpenCL implementation of the Open Dwarfs, a benchmark suite that captures patterns of computation and communication common to classes of important applications, as delineated by Berkeley's Dwarfs. We evaluate portability across multicore CPU, GPU, APU (CPUs+GPUs on a die), the Intel Xeon Phi co-processor, and the FPGA. To realize FPGA portability, we exploit SOpenCL (Silicon OpenCL), a CAD tool that automatically converts OpenCL kernels to customizable hardware accelerators. We show that a single, unmodified OpenCL code base, i.e., Open Dwarfs, can be effectively used to target multiple, architecturally diverse platforms.