Basic HTML version of Foils prepared 24 August 98

Foil 16 Multicomputer Cost Model

From Master Foilset for CPS615 Introduction -- Material from Culler and Koelbel Computational Science for Simulations -- Fall Semester 1998. by Geoffrey C. Fox, Nancy McCracken
Cost of remote memory access/communication (including synchronization)
  • T = ts + N tw
  • ts = per-message cost ("latency")
  • tw = per-word cost
  • N = message size in words
Hence data locality is an important property of good parallel algorithms
N
T
ts
tw

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