Programming GPU-Accelerated OpenPOWER Systems with OpenACC

This 2h tutorial interactively teaches how to handle the massive computing performance offered by POWER systems with NVLink- attached GPUs – the technology also powering Sierra and Summit, two of the fastest supercomputers in the US. The POWER architecture is presented and the available software stack highlighted. Interactively, programming of the attached GPUs with OpenACC is explored by using real-world examples; the most important OpenACC directives are taught on the way. The resulting GPU-accelerated program can easily be used on other GPU-equipped machines and architectures, by nature of OpenACC's portable approach