Measuring Performance
Time = Elapsed time, Response Time, Wall Clock Time
CPU Execution Time (CPU Time) = time CPU applies to program
- User CPU Time = time CPU spends on user code
- System CPU Time = time CPU spends in system for user
CPU Performance = User CPU time
System Performance = Elapsed time on unloded system
Hardware Clock
- Many terms: clock cycles, clock periods, ticks, clock ticks, cycles
- Clock period can be cycle time or clock rate
- Cycle time (sec) is inverse of clock rate (Hz)