Significance of GPU programming models

Significance of GPU programming models

The article provides an overview of various GPU programming models and approaches. It explores the options available for using GPUs in computations. Also, it highlights the different software environments, APIs, and programming languages used for GPU programming.

GPU programming can take various forms. Sometimes, code may already be available, requiring minimal parameter configuration. Using libraries to address computationally intensive sections of the code is an option. However, these scenarios are limited, and in most cases, programming is essential.

The following programming models are explained:

  1. Standard C++/Fortran: Programs written in standard C++ and Fortran can benefit from NVIDIA GPUs without relying on external libraries. This is made possible through the NVIDIA SDK suite of compilers, which translates and optimizes the code for GPU execution.
  2. Directive-based Programming: Directive-based approaches annotate existing serial code with hints to indicate which loops and regions should be executed on the GPU. OpenACC and OpenMP are two common directive-based programming models discussed in the article.
  • OpenACC
  • OpenMP
  1. Non-portable Kernel-based Models (Native Programming Models): These models provide developers with a high level of control by writing low-level code. This communicates directly with the GPU hardware. CUDA and HIP are examples of such models.
  • CUDA
  • HIP (Heterogeneous Interface for Portability)
  1. Portable Kernel-based Models (Cross-platform Portability Ecosystems): These models offer a higher-level abstraction layer for GPU programming. This makes developing and deploying GPU-accelerated applications easier. Some examples include Alpaka, Kokkos, OpenCL, RAJA, and SYCL.
  • Kokkos
  • OpenCL (Open Computing Language)
  • SYCL

The article also discusses high-level language support for GPU programming in Python and Julia:

  • Python
  • Julia

Read More: Introduction to GPU programming models