Issues relating to MP for UNIX Operating Systems: Apps

• Application must be able use parallelism

  • OS must provide primitives to support parallel execution
    • Processes, threads
  • OS may do little, some, or lots of the work
    • Network stack
    • File system
  • An MP-capable and MP-optimized thread library is very important

• System libraries and services may need a lot of work to work well with threads