Network Stack Concerns

• Overhead: Per-packet costs

  • Network stacks may process millions of PPS
  • Small costs add up quickly if per-packet

• Ordering

  • TCP is very sensitive to mis-ordering

• Optimizations may conflict

  • Optimizing for latency may damage throughput, and vice versa

• When using locks, ordering is important

  • Lock orders prevent deadlock
  • Data passes in various directions through layers