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Systolic arrays [8393a810]

Systolic arrays

  • cannon's algorithm and summa in hpc
  • Systolic arrays used by video encoding

  • Ht Kung originally left the field because of networking issues, systolic arrays were gated by issues of networking

    • revisited in 2012 by norm juppie
    • Jeff hinton
    • Simplifies io
    • Originally birthed in cray era, vector ALU, cheap memory, expensive compute, optimizing for word per cycle
    • Only so many pins, only so many bandwidth
    • Amdhal's law
    • Gpgpu issues? Why it was slower?
    • Tpu origin because of voice
    • Interconnect and memory
  • now solved with the extremely complex interconnects
  • Broadcast once, flow once