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DTSTART:19700308T020000
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DTSTART:19701101T020000
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BEGIN:VEVENT
DTSTAMP:20211207T055404Z
LOCATION:Online
DTSTART;TZID=America/Chicago:20211114T110000
DTEND;TZID=America/Chicago:20211114T113000
UID:submissions.supercomputing.org_SC21_sess430_ws_exampi106@linklings.com
SUMMARY:Partitioned Collective Communication
DESCRIPTION:Workshop\n\nPartitioned Collective Communication\n\nHolmes, Sk
 jellum, Jaeger, Grant, Bangalore...\n\nPartitioned point-to-point communic
 ation and persistent collective communication were recently standardized i
 n MPI-4.0. They both offer performance and scalability advantages over MPI
 -3.1-based communication when planned transfers are possible in an MPI app
 lication. Partitioned collectives will be particularly useful for multithr
 eaded, accelerator-offloaded, and/or hardware-collective-enhanced MPI impl
 ementations driving suitable applications, as well as for pipelined collec
 tive communication (e.g., partitioned allreduce) with single consumers and
  producers per MPI process. These operations also provide load imbalance m
 itigation. Halo-exchange codes arising from regular and irregular grid/mes
 h applications are a key candidate class of applications for this function
 ality.  For such codes, efficient support for double-buffering is a key dr
 iver for partitioned collective operations.  The option of providing local
  and incomplete modes for initialization procedures is mentioned (which co
 uld also apply to persistent collective operations); these semantics inter
 act with the Pbuf_prepare concept and the progress rule.\n\nTag: Online On
 ly, Extreme Scale Computing, Parallel Programming Languages and Models, Pe
 rformance\n\nRegistration Category: Workshop Reg Pass
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