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PRODID:-//Microsoft Corporation//Outlook MIMEDIR//EN
VERSION:1.0
BEGIN:VEVENT
DTSTART:20141118T213000Z
DTEND:20141118T220000Z
LOCATION:388-89-90
DESCRIPTION;ENCODING=QUOTED-PRINTABLE:ABSTRACT: The mapping of MPI processes to compute nodes in a supercomputer has a=0Afirst-order impact on communication performance. For high-performance=0Acomputing (HPC) applications with stable communication, rich offline=0Aanalysis of such communication can improve the communication=0Aperformance by optimizing the mapping. Unfortunately, current=0Apractices for at-scale HPC consider only the communication graph and=0Anetwork topology in solving this problem.=0A=0AWe propose Routing-aware Hierarchical Task Mapping (RAHTM) which=0Aleverages routing algorithm awareness to improve task mapping. RAHTM=0Aachieves high-quality mappings by combining (1) a divide-and-conquer =0Astrategy to achieve scalability, (2) a limited search of mappings,=0Aand (3) a linear programming based routing-aware approach to=0Aevaluate possible mappings in the search space. =0ARAHTM achieves 20% reduction in=0Acommunication time and a 9% reduction in overall execution time, for=0Athree communication-heavy benchmarks scaled up to 16K processes on a=0ABlue Gene/Q platform.
SUMMARY:RAHTM: Routing Algorithm Aware Hierarchical Task Mapping
PRIORITY:3
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