Shared memory MIMDs: multiprocessors

• Network : typically indirect or hybrid (indirect + point-to-point)
• Memory
  • Locally addressable
  • Globally addressable
• Communication & synchronization
  • Via sharing of data (transparent)
    • Critical regions (locking)
    • Message passing can be emulated
• Architecture is $[\mbox{not},..,\mbox{reasonably}]$ scalable
• Cache coherency problem