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Programming Your GPU with OpenMP

This is a hands-on tutorial that introduces the basics of targetting GPUs with OpenMP 4.5 through a series of worked examples.

Starting with serial code, the tutorial takes you thorugh parallellising, exploring the performance characteristics, and optimising the following small programs:

  • vadd – A simple vector addition program, often considered the "hello world" of GPU programming.
  • pi – A numerical integration program that calculates and approximate value of π.
  • jac_solv – A Jacobi solver.
  • heat - An explicit finite difference 5-point stencil code.

Usage

To build all the examples:

make

To run, submit jobs using your training account:

qsub submit_vadd     # For vector add
qsub submit_pi       # For pi
qsub submit_jac_solv # For Jacobi
qsub submit_heat     # For heat

Publication history

Versions of this tutorial have been presented at SC'17, SC'18, SC'19, and virtually at SC'20 and SC'21. A version of this tutorial was presented UK OpenMP Users' Conference in 2018 and 2019.