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DTSTART;TZID=America/Chicago:20181112T153000
DTEND;TZID=America/Chicago:20181112T161000
UID:submissions.supercomputing.org_SC18_sess158_pec203@linklings.com
SUMMARY:Keynote 3: Hierarchical Algorithms on Hierarchical Architectures
DESCRIPTION:David Keyes (King Abdullah University of Science and Technolog
 y)\n\nSome algorithms achieve optimal arithmetic complexity with low arith
 metic intensity (flops/Byte), or possess high arithmetic intensity but lac
 k optimal complexity, while some hierarchical algorithms, such as Fast Mul
 tipole and its H-matrix algebraic generalizations, realize a combination o
 f optimal complexity and high intensity. Implemented with task-based dynam
 ic runtime systems, such methods also have potential for relaxed synchrony
 , which is important for future energy-austere architectures, since there 
 may be significant nonuniformity in processing rates of different cores ev
 en if task sizes can be controlled. We describe modules of KAUST's Hierarc
 hical Computations on Manycore Architectures (HiCMA) software toolkit that
  illustrate these features and are intended as building blocks of more sop
 histicated applications, such as matrix-free higher-order methods in optim
 ization. HiCMA's target is hierarchical algorithms on emerging architectur
 es, which have hierarchies of their own that generally do not align well w
 ith those of the algorithm.  Some modules of this open source project have
  been adopted in the software libraries of major vendors. We describe what
  is currently available and some motivating applications.\n\nTag: Algorith
 ms, Heterogeneous Systems, Resiliency\n\nRegistration Category: Workshop R
 eg Pass\n\nSession Chairs: Vassil Alexandrov (Hartree Centre, STFC); Jack 
 Dongarra (University of Tennessee, Knoxville; Oak Ridge National Laborator
 y (ORNL)); Christian Engelmann (Oak Ridge National Laboratory (ORNL)); and
  Al Geist (Oak Ridge National Laboratory (ORNL))\n\n
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