Benchmark tools

• Lockmeter

  • IBM/SGI tool presented at ALS 2000
  • Analyses
    • Contention as percentage of arrivals
    • Hold times (average and max)
    • Wait times (average and max)

• Home-brewed "counter" patch

  • uses /proc to export counters for
    • runqueue lengths
    • #calls to schedule(), reschedule_idle()....

Notes: