Basic HTML version of Foils prepared 17 November 98

Foil 35 Shared Address Space Model

From Master Foilset for HPC Achitecture Overview CPS615 Introduction to Computational Science -- Fall Semester 1998. by Geoffrey C. Fox
Process: virtual address space plus one or more threads of control
Portions of address spaces of processes are shared
Writes to shared address visible to other threads (in other processes too)
Natural extension of uniprocessor's model:
  • conventional memory operations for communication;
  • special atomic operations for synchronization
OS uses shared memory to coordinate processes

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