Videos & Podcasts
Migrating and tuning a CUDA-based stencil computation to DPC++
August 10, 2021
Reverse Time Migration takes advantage of the finite-difference method (FD) to perform the numerical approximations for the acoustic wave equation. Stencil computation applied to this numerical method represents a computational bottleneck when developing RTM applications, and therefore needs to be optimized to guarantee timely results and efficiency when allocating resources for hydrocarbon exploration. This article presents a migration experience from a CUDA-based RTM source code to Data-Parallel C++ (DPC++) using Intel DPC++ Compatibility Tool (DPCT). Migrated source code is proven to be easier to maintain, as it unifies the algorithm execution flow for our application in a unique structure. Besides migration experience, we could easily explore memory management, achieving twice the performance and an arithmetic intensity 4,9x higher than the first version.
Clícia S. Pinto
Senior Performance Engineer