This week I spent a couple of days in Swansea attending a course titled Single Node Performance Optimisation, the name of which may already be sending you fleeing for your bookmark bar. It was essentially a break down of how to be a better programmer for supercomputer applications, and turned out to be one of the most worthwhile courses I’ve been on since starting my Ph.D. The course broke down as follows:
- Node Architecture An overview of how nodes are structured, including shared memory, different levels of cache, and the processor architecture itself.
- Profiling Guide to a range of profiling techniques, for isolating bad performing code
- Optimising with the Compiler Using optimisation flags and compiler information to gain further performance
- Vectorisation Exploiting the vector arrangement of modern processors to carry out multiple concurrent operations
- Optimising for the memory hierarchy Using the different levels of Cache in a given node better
- Optimising multi-threaded code How to take full advantage of OpenMP and MPI both within individual and across multiple nodes
The course was run by Archer, the latest UK National Supercomputing Service. If you’re an academic doing any kind of HPC work in the UK, these guys are worth talking to; they do a number of courses from beginner to advanced, and can provide access to their dedicated supercomputing resources, though I’m not sure what it’ll cost you.
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