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Optimising HPC applications for the Arm ecosystem


School of Informatics

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Dr M Weiland , Dr O Perks No more applications being accepted Funded PhD Project (European/UK Students Only)

About the Project

In the past couple of years, Arm processors have been shown to be a viable alternative to Intel or AMD CPUs for HPC systems. 2018 and 2019 saw the installation of a number of Arm-based supercomputer in the US and Europe. HPC-grade Arm CPUs are being produced by a range of processor manufacturers, such as Huawei, Marvell, Ampere or Fujitsu, to name a few. Japan’s flagship supercomputer Fugaku, which is currently being installed, is based on Fujitsu’s A64FX Arm CPU.

With Arm CPUs becoming more popular, the surrounding software ecosystem must support the often complex (performance) demands of HPC applications. This ranges from vectorisation and memory management to optimised scientific libraries and programming models. This PhD project will investigate the performance of commonly used scientific applications (both HPC and Machine Learning/AI) in depth, focussing in particular (though not exclusively) on taking advantage of Arm’s Scalable Vector Extension (SVE) and novel instructions for performance. In addition, investigations of the impact of GPUs on Arm and High-Bandwidth Memory are within the scope of this project.

The student will study at EPCC and have access to EPCC’s 4096-core Catalyst UK system, Fulhame (based on the Marvell ThunderX2 64-bit Armv8 processor), from the start. Access to other Arm-based system and future-generation architectures will become available during the course of the PhD.

This PhD opportunity is based within EPCC (https://www.epcc.ed.ac.uk), a Centre of Excellence within the College of Science and Engineering at the Unviersity of Edinburgh, and one of Europe’s leading supercomputing centres.

Minimum Requirements:
A UK 2:1 honours degree, or its international equivalent, in a relevant subject such as computer science and informatics, physics, mathematics, or engineering. You must be a competent programmer in at least one of C, C++, or Fortran.

Recommended/Desirable Skills and Experience:
• Understanding of HPC programming concepts;
• Experience of using HPC systems;
• Application benchmarking and optimisation.
• Masters degree in a related field
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