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.To build all the examples:
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
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.
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