Performance

Question 1

What is the SPECrattio?

Answer 1

The SPEC ratio is the result of dividing the execution time of a reference processor by the execution time of the measured computer. i.e. it is the normalized execution time.

Question 2

How is the overall Spec Ratio calculated?

Answer 2

Overall spec ratio is the geometric mean of the previous ratios. i.e. multiplied together.

Question 3

What is MIPS as a performance metric?

Answer 3

MIPS is Millions of Instructions Per Second

Question 4

What is Amdahl’s Law

Answer 4

Question 5

What is ssj_ops

Answer 5

Spec Power Benchmark

• Power consumption of server at different workload levels – ‘server side Java operations’ (ssj)
• Performance: ssj_ops/sec
• Power: Watts (Joules/sec)
• Measured in 10% workload increments (ssj_opsi)
• Power measured at each level (poweri)