BEGIN:VCALENDAR
VERSION:2.0
PRODID:Linklings LLC
BEGIN:VTIMEZONE
TZID:America/Denver
X-LIC-LOCATION:America/Denver
BEGIN:DAYLIGHT
TZOFFSETFROM:-0700
TZOFFSETTO:-0600
TZNAME:MDT
DTSTART:19700308T020000
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0600
TZOFFSETTO:-0700
TZNAME:MST
DTSTART:19701101T020000
RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20200129T163600Z
LOCATION:607
DTSTART;TZID=America/Denver:20191118T163000
DTEND;TZID=America/Denver:20191118T165000
UID:submissions.supercomputing.org_SC19_sess124_ws_lasalss112@linklings.co
 m
SUMMARY:Parallel Multigrid Methods on Manycore Clusters with IHK/McKernel
DESCRIPTION:Workshop\n\nParallel Multigrid Methods on Manycore Clusters wi
 th IHK/McKernel\n\nNakajima, Gerofi, Ishikawa, Horikoshi\n\nThe parallel m
 ultigrid method is expected to play an important role in large-scale scien
 tific computing on exa-scale supercomputer systems. Previously we proposed
  Hierarchical Coarse Grid Aggregation (hCGA), which dramatically improved 
 the performance of the parallel multigrid solver when the number of MPI pr
 ocesses was O(10^4) or more. Because hCGA can handle only two layers of pa
 rallel hierarchical levels, the computation overhead due to coarse grid so
 lver may become significant when the number of MPI processes reaches O(10^
 5)- O(10^6) or more. In the present work, we propose AM-hCGA (Adaptive Mul
 tilevel hCGA) that can take into account multiple layers of three or more 
 levels, and show preliminary results using the Oakforest-PACS (OFP) system
  by JCAHPC. Additionally, we also examine the impact of a lightweight mult
 i-kernel operating system, called IHK/McKernel, for parallel multigrid sol
 vers running on OFP.\n\nTag: Workshop Reg Pass, Algorithms, Scalable Compu
 ting\n\nRegistration Category: Workshop Reg Pass, Algorithms, Scalable Com
 puting
URL:https://sc19.supercomputing.org/presentation/?id=ws_lasalss112&sess=se
 ss124
END:VEVENT
END:VCALENDAR