Reducing cache miss rate using thread oversubscription to accelerate an MPI-OpenMP-based 2-D Hopmoc method

Abstract

This paper applies the MPI-OpenMP-based two-dimensional Hopmoc method using the explicit work-sharing technique with a recently proposed mechanism to reduce implicit barriers in OpenMP. Specifically, this paper applies the numerical algorithm to yield approximate solutions to the advection-diffusion equation. Additionally, this article splits the mesh used by the numerical method and distributes them to over-allocated threads. The mesh partitions became so small that the approach reduced the cache miss rate. Consequently, the strategy accelerated the numerical method in multicore systems. This paper then evaluates the results of implementing the strategy under different metrics. As a result, the set of techniques improved the performance of the parallel numerical method.