Basic HTML version of Foils prepared August 4 1996

Foil 22 Operating System Issues - I

From Summary of Working Groups at PAWS and PetaSoft Meetings PAWS(Mandalay Beach) and PetSoft(Bodega Bay) -- April 23 and June 17-19,96. by Geoffrey C. Fox
Need to study separately the issues for
  • "Micromemory" -- as little as 1 megabyte of memory per processor in PIM
  • General Hierarchical and Heterogeneous (distributed shared memory) Systems
As always in year 2005 need latency-tolerant Operating Systems!
Unclear message on need for Protection
Need support for multithreading and sophisticated scheduling
Scaling of Concurrent I/O ?
  • Need to understand this at teraflop performance level first!
  • Can one use COMA (Cache Only Memory) ideas for I/O

Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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