Parallel Scaling Characteristics of Selected NERSC User ProjectCodes

Technical Report · Sat Mar 05 04:00:00 EST 2005

DOI:https://doi.org/10.2172/885226· OSTI ID:885226

Skinner, David; Verdier, Francesca; Anand, Harsh; Carter, Jonathan; Durst, Mark; Gerber, Richard

This report documents parallel scaling characteristics of NERSC user project codes between Fiscal Year 2003 and the first half of Fiscal Year 2004 (Oct 2002-March 2004). The codes analyzed cover 60% of all the CPU hours delivered during that time frame on seaborg, a 6080 CPU IBM SP and the largest parallel computer at NERSC. The scale in terms of concurrency and problem size of the workload is analyzed. Drawing on batch queue logs, performance data and feedback from researchers we detail the motivations, benefits, and challenges of implementing highly parallel scientific codes on current NERSC High Performance Computing systems. An evaluation and outlook of the NERSC workload for Allocation Year 2005 is presented.

• Research Organization: Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director. Office of Science. Office of AdvancedScientific Computing Research
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 885226
• Report Number(s): LBNL/PUB--904-(2006); LBNL/PUB-904; BnR: KJ0102000
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
COMPUTERS
EVALUATION
FEEDBACK
PERFORMANCE
QUEUES