15-Pflops Nonlinear Earthquake Simulation on Sunway
TaihuLight: Enabling Depiction of Realistic 10 Hz
Scenarios
SessionACM Gordon Bell Finalists
Authors
Event Type
ACM Gordon Bell Finalist
TimeThursday, November 16th11am -
11:30am
Location301-302-303
DescriptionThis paper reports our work on building a highly
efficient earthquake simulation platform on Sunway
TaihuLight, with 125 Pflops computing power and over 10
million cores. With the platform originated from AWP-ODC
and CG-FDM, a large part of our efforts focuses on
redesigning the velocity, stress, and plasticity
processing kernels for the completely different
microarchitecture and significantly increased
parallelism of Sunway TaihuLight. By a combined approach
including (1) an optimized parallelization scheme, (2)
the most suitable blocking configuration, (3) fusion of
co-located arrays, (4) register communication with CPE
ID remapping for halo exchanges, and (5) customized
ROM-less evaluation of elementary function, we manage to
achieve an efficient utilization of over 12.2% of the
theoretical peak of the entire system. Our program
provides a sustained performance of over 15 Pflops and
enables the simulation of the Tangshan earthquake with a
spatial resolution of 25 m and a frequency of 10
Hz.
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