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DTSTAMP:20210916T132448Z
LOCATION:Jean Calvin
DTSTART;TZID=Europe/Stockholm:20210705T163000
DTEND;TZID=Europe/Stockholm:20210705T170000
UID:submissions.pasc-conference.org_PASC21_sess132_msa290@linklings.com
SUMMARY:Accelerating Earth-System Simulations with ARM Technology: Initial
  Experiments on Fugaku
DESCRIPTION:Minisymposium\n\nAccelerating Earth-System Simulations with AR
 M Technology: Initial Experiments on Fugaku\n\nHatfield, Dueben, Nishizawa
 , Kloewer, Pershin...\n\nIn 2020, Fugaku became the fastest supercomputer 
 ever constructed, with a peak performance of almost 500 petaFLOP/s. Unlike
  other top systems, Fugaku eschews accelerator technology in favour of a m
 ore traditional CPU approach. Nevertheless, the Fujitsu A64fx ARM-based CP
 U is sufficiently different from a commodity CPU to warrant additional dis
 cussion. Unlike most CPUs, for example, the A64fx permits half-precision f
 loating-point calculations, with an associated speed-up of up to 4x for ve
 ctorised operations, compared with double-precision. Given that this techn
 ology will likely permeate into Earth-System simulation science as well, w
 ith a number of A64fx-based systems coming online in Europe soon, it is im
 portant to evaluate how it might be used to accelerate our Earth-System mo
 dels. This is especially the case considering that, in principle, existing
  models could run on the A64fx without extra coding effort. In this talk, 
 I will introduce some early results that have come from a new collaboratio
 n between ECMWF and Oxford University in the UK and RIKEN in Japan, where 
 Fugaku is based. I will discuss the key features of the A64fx chip and ill
 ustrate these with results from simple toy models, focusing in particular 
 on the use of half-precision.\n\nDomain: CS and Math, Climate and Weather,
  Physics
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