Operating System Issues - I

Operating System Issues - I

• 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

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