Operating System Issues - II

Operating System Issues - II

• Message Passing
  • Clearly need buffer management, flow control, protocols etc.
  • But what is appropriate mechanisms -- need to revisit comparison of active messages versus MPI etc.
• Need to be able to restart separate parts of the (large) hardware independently
• Need to support performance evaluation with different levels of memory hierarchy exposed
• Need Storage management and garbage collection
  • PIM micromemory different from hierarchical shared memory
• Need good job and resource management tools
• Checkpoint/restart only needed at natural synchoronization points

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