Princeton Institute for Computational Science and Engineering Colloquium

Lunch served at 11:45 pm at PICSciE reception area, 300 Lewis Science Library. ABSTRACT: The last decade has witnessed a rapid emergence of larger and faster computing systems in the US supercomputing centers. Massively parallel machines have gone mainstream and are now the tool of choice for large scientific simulations. Scientific applications need to be modified, adapted, and optimized for each new system being introduced. With a few petascale systems now in production mode, the focus of the DOE Office of Advanced Scientific Computing Research has now shifted to the next level of "Exascale", which promises to be truly disruptive. With an estimated billion cores to deal with, scientific applications will need to manage extreme parallelism, limited bandwidth, frequent failures, and many more hardware and software challenges. In this talk, I will discuss the path to extreme scale computing from the point of view of the large-scale gyrokinetic particle-in-cell codes developed at Princeton University's Plasma Physics Laboratory to study microturbulent transport in fusion plasmas.