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UID:submissions.supercomputing.org_SC23_sess447_ws_pmbsf119@linklings.com
SUMMARY:SPEChpc 2021 Benchmarks on Ice Lake and Sapphire Rapids Infiniband
  Clusters:  A Performance and Energy Case Study
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\nWe assess fundamental performance, power,
  and energy characteristics of the SPEChpc 2021 benchmark suite on two clu
 sters based on Intel Ice Lake and Sapphire Rapids CPUs using MPI only. We 
 use memory bandwidth, data volume, and scalability metrics in order to cat
 egorize the benchmarks and pinpoint relevant performance and scalability b
 ottlenecks on the node and cluster levels. Common patterns such as memory 
 bandwidth limitation, dominating communication and synchronization overhea
 d, MPI serialization, superlinear scaling, and alignment issues could be i
 dentified, in isolation or in combination, showing that SPEChpc 2021 is re
 presentative of many HPC workloads. Power dissipation and energy measureme
 nts indicate that the modern Intel server CPUs have such a high idle power
  level that race-to-idle is the paramount strategy for energy to solution 
 and energy-delay product minimization. On the chip level, only memory-boun
 d code shows a clear advantage of Sapphire Rapids compared to Ice Lake in 
 terms of energy.\n\nTag: Modeling and Simulation, Performance Measurement,
  Modeling, and Tools\n\nRegistration Category: Workshop Reg Pass\n\nSessio
 n Chairs: Simon Hammond (National Nuclear Security Administration (NNSA));
  Stephen Jarvis (University of Birmingham, UK); and Steven A. Wright (Univ
 ersity of York, England)\n\n
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