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DTSTART:19700308T020000
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BEGIN:VEVENT
DTSTAMP:20210402T160544Z
LOCATION:Poster Module
DTSTART;TZID=America/New_York:20201119T083000
DTEND;TZID=America/New_York:20201119T170000
UID:submissions.supercomputing.org_SC20_sess337_rpost159@linklings.com
SUMMARY:The Arithmetic Intensity of High-Order Discontinuous Galerkin Meth
ods for Hyperbolic Systems
DESCRIPTION:Posters, Research Posters\n\nThe Arithmetic Intensity of High-
Order Discontinuous Galerkin Methods for Hyperbolic Systems\n\nTandon, Joh
nsen\n\nHigh-fidelity numerical simulations of complex flow problems requi
re high-resolution capabilities, which can be achieved by employing high-o
rder methods. A class of recovery-assisted discontinuous Galerkin (RADG) m
ethods can achieve high-orders of accuracy by strategically combining degr
ees of freedom from neighboring cells; the order of accuracy can be increa
sed by increasing the polynomial degree p of the solution representation.
An increase in p, however, increases the number of degrees of freedom, the
reby significantly increasing the memory footprint due to I/O operations a
nd floating-point operations. In this study, the arithmetic intensity, whi
ch is the amount of work done per data transferred, of a class of RADG met
hods for hyperbolic systems of conservation laws is theoretically analyzed
for p=1 through 6. Different data cache models are considered, and numeri
cal experiments demonstrate that RADG methods have high arithmetic intensi
ty, thus more effectively utilizing on-node floating-point capabilities on
modern high-performance computing (HPC) platforms.\n\nRegistration Catego
ry: Tech Program Reg Pass, Exhibits Reg Pass
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