Quiz 1 Flashcards
Computer performance evaluations for speed
Throughput - bits per second
Response time - akam execution time or elapsed time
Equation for performance of program X
1 / Execution time
Equation for relative performance
n = performanceM1 / performanceM2
if N > 1, then M1 is n times faster than M2
Effects of using a faster processor
Decreases response time
Increases throughput
Effects of adding more processors to a system
Increase in throughput
Decrease in response time (if overhead is low)
Massively Parallel Processors (MPP)
Separate computers with different operating systems working on the same task
Symmetric Multiprocessing Processors (SMP)
Multiple processors sharing an operating system
Amdahl’s Law
Given: fraction enhanced (fraction of execution time with improved performance) and factor of improvement (times performance is improved)
Amdahl’s Law example
CPU equations
CPU equation relations
Where CPU equation components come from
Calculating CPI
