What is an MP-Capable OS?

• An OS is MP-capable if it is able to operate correctly on MP systems

  • This could mean a lot of different things
  • Usually implies it is able to utilize >1 CPU

• Common approach is Single System Image

  • “Look like a single-processor system”
  • But be faster

• Other models are possible

  • Most carefully select variables to degrade
  • Weak memory models, message passing, ...