Network Stack Locking Variables

• UP/SMP/HTT

• Mpsafe (or not)

• Scheduler Choices

  • 4BSD, ULE

• Synchronization Optimization

  • ADAPTIVE_MUTEXES, wakeup, hashes, ...

• NETISR model

  • Direct ithread, one netisr, multiple netisr
  • Coallescing models to amortize per-packet cost