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DTSTART;TZID=America/Denver:20231113T091000
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UID:submissions.supercomputing.org_SC23_sess447_ws_pmbss116@linklings.com
SUMMARY:Physical Oscillator Model for Supercomputing
DESCRIPTION:Ayesha Afzal and Georg Hager (Friedrich-Alexander University, 
 Erlangen-Nuremberg; Erlangen National High Performance Computing Center) a
 nd Gerhard Wellein (Friedrich-Alexander University, Erlangen-Nuremberg; De
 partment of Computer Science)\n\nA parallel program together with the para
 llel hardware it runs on is not only a vehicle to solve numerical problems
 , it is also a complex system with interesting dynamical behavior: resynch
 ronization and desynchronization of parallel processes, propagating phases
  of idleness, and the peculiar effects of noise and system topology are ju
 st a few examples. We propose a physical oscillator model (POM) to describ
 e the dynamics of interacting parallel processes. A process with its regul
 ar compute-communicate cycles is modeled as an oscillator which is coupled
  to other oscillators (processes) via an interaction potential. Instead of
  a simple all-to-all connectivity as in the standard well-known Kuramoto m
 odel, we employ a sparse topology matrix mapping the communication structu
 re of the parallel program onto the oscillator setup. We show that the POM
  with appropriate potentials can mimic the propagation of delays and the s
 ynchronization and desynchronization behavior of scalable and bottlenecked
  parallel programs, respectively.\n\nTag: Modeling and Simulation, Perform
 ance Measurement, Modeling, and Tools\n\nRegistration Category: Workshop R
 eg Pass\n\nSession Chairs: Simon Hammond (National Nuclear Security Admini
 stration (NNSA)); Stephen Jarvis (University of Birmingham, UK); and Steve
 n A. Wright (University of York, England)\n\n
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