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DTSTART:19700308T020000
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DTSTAMP:20260522T150111Z
LOCATION:C2/3/4 Ballroom
DTSTART;TZID=America/Chicago:20181115T083000
DTEND;TZID=America/Chicago:20181115T170000
UID:submissions.supercomputing.org_SC18_sess324_post109@linklings.com
SUMMARY:Redesigning The Absorbing Boundary Algorithm for Asynchronous High
  Performance Acoustic Wave Propagation
DESCRIPTION:Rached Abdelkhalak and Kadir Akbudak (King Abdullah University
  of Science and Technology) and Vincent Etienne and Thierry Tonellot (Saud
 i Aramco)\n\nExploiting high concurrency, relaxing the synchrony of existi
 ng algorithms, and increasing data reuse have immense effect in performanc
 e. We integrate the Multicore-optimized Wavefront Diamond (MWD) tiling app
 roach by Malas et al. [SIAM SISC, 2015, ACM Trans. Parallel Comput. 2017],
   which takes into account the three aforementioned ingredients, into the 
 industrial project codenamed ExaWave framework beside the traditional spat
 ial blocking (SB) technique for stencil computations. However, the fine-gr
 ained asynchronous handling of the Convolution Perfectly Matched Layer (CP
 ML) for absorbing boundary conditions turns out to be a challenging open r
 esearch problem, due to severe inherent data dependencies constraints, whi
 ch impedes MWD performance impact. We propose techniques of loop fusion to
  reduce memory traffic and sliding windows to cut down the engendered extr
 a flops, in order to consolidate CPML integration with the overall asynchr
 onous MWD technique. The experimental results on Intel's latest processors
  show the effectiveness of the proposed techniques.\n\nRegistration Catego
 ry: Tech Program Reg Pass, Exhibits Reg Pass\n\n
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