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DTSTAMP:20260422T143012Z
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UID:submissions.supercomputing.org_SC24_sess533_post167@linklings.com
SUMMARY:DisCostiC: Simulating MPI Applications Without Executing Code
DESCRIPTION:Ayesha Afzal, Georg Hager, and Gerhard Wellein (Friedrich-Alex
 ander University, Erlangen-Nuremberg; Erlangen National High Performance C
 omputing Center)\n\nWe present the cross-architecture parallel simulation 
 framework DisCostiC (Distributed Cost in Clusters). It predicts the perfor
 mance of real or hypothetical, massively parallel MPI(+X) programs on curr
 ent and future supercomputer systems. The novelty of DisCostiC is that it 
 employs analytical, first-principle performance models at full scale, incl
 uding cores, chips, nodes, and networks, while being aware of bottlenecks 
 such as memory bandwidth. DisCostiC uses application skeletons in a Domain
 -Specific Embedded Language (DSEL), which encodes inter-process dependenci
 es and any number of system and code properties, enabling flexible design 
 space exploration. As a consequence of the model-based design, DisCostiC r
 equires much less time and resources than traditional simulators because t
 he application code is never actually run. This is in contrast to state-of
 -the-art solutions, which are based on trace data and/or simulated code ex
 ecution and may thus need considerable resources. The resulting traces can
  be visualized using Chromium Browser, ITAC, or Vampir.\n\nRegistration Ca
 tegory: Tech Program Reg Pass, Exhibits Reg Pass\n\nSession Chairs: Ayesha
  Afzal (Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Nation
 al High Performance Computing Center); Sally Ellingson (University of Kent
 ucky); and Alan Sussman (University of Maryland)\n\n
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