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DTSTART:19700308T020000
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BEGIN:VEVENT
DTSTAMP:20181221T160904Z
LOCATION:C2/3/4 Ballroom
DTSTART;TZID=America/Chicago:20181113T083000
DTEND;TZID=America/Chicago:20181113T170000
UID:submissions.supercomputing.org_SC18_sess325_spost119@linklings.com
SUMMARY:Designing Shared Address Space MPI Libraries in Many-Core Era
DESCRIPTION:ACM Student Research Competition, Poster\nTech Program Reg Pas
 s, Exhibits Reg Pass\n\nDesigning Shared Address Space MPI Libraries in Ma
 ny-Core Era\n\nHashmi\n\nThe emergence of modern multi-/many-cores has put
  more emphasis on optimizing intra-node communication. Existing designs in
  MPI libraries that work on the concept of distributed address spaces incu
 r the overhead of intermediate memory copies to stage the data between pro
 cesses. This can lead to severe performance degradation especially on emer
 ging many-core architectures like Intel Skylake and IBM OpenPOWER. This wo
 rk proposes a high-performance "shared address-space"-based MPI point-to-p
 oint and collective communication designs using XPMEM. We first characteri
 ze the bottlenecks associated with XPMEM based communication and propose n
 ew designs for efficient MPI large message communication. Then we propose 
 novel collective designs that are contention-free and offer true zero-copy
  reduction operations. The proposed designs are evaluated on different mul
 ti-/many-core architectures using various micro-benchmarks and application
  kernels such as MiniAMR and AlexNet DNN training on CNTK. The proposed de
 signs have shown significant performance improvement over state-of-the-art
  available in MPI libraries.
URL:https://sc18.supercomputing.org/presentation/?id=spost119&sess=sess325
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