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DTSTAMP:20260522T150116Z
LOCATION:D172
DTSTART;TZID=America/Chicago:20181111T153000
DTEND;TZID=America/Chicago:20181111T154000
UID:submissions.supercomputing.org_SC18_sess157_ws_hpcsysp112@linklings.co
 m
SUMMARY:Studying Effects of Meltdown and Spectre Patches on the Performanc
 e of HPC Applications Using Application Kernel Module of XDMoD
DESCRIPTION:Nikolay A. Simakov, Martins D. Innus, Matthew D. Jones, Ohad K
 atz, Joseph P. White, Ryan Rathsam, Steven M. Gallo, Robert L. DeLeon, and
  Thomas R. Furlani (State University of New York at Buffalo)\n\nIn this wo
 rk we examine how the updates addressing Meltdown and Spectre vulnerabilit
 ies impact the performance of HPC applications. To study this we use the a
 pplication kernel module of XDMoD to test the performance before and after
  the application of the vulnerability patches. The application kernel modu
 le is designed for continuous performance monitoring of HPC systems. Here,
  we tested the performance difference for multiple applications and benchm
 arks including: NWChem, NAMD, GAMESS, ENZO, HPCC, IOR, MDTest and IMB. The
  results show that although some specific functions can have execution tim
 es decreased by as much as 74%, the majority of individual metrics indicat
 e little to no decrease in performance. The real-world applications show a
  2-3% decrease in performance for single node jobs and a 5-11% decrease fo
 r two node jobs. For node-counts up to 8 the degradation continues to incr
 ease reaching 27% in some cases.\n\nTag: HPC Center Planning and Operation
 s, State of the Practice, System Administration\n\nRegistration Category: 
 Workshop Reg Pass\n\n
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