
Introduction to Novel Microprocessor ArchitecturesIntroduction to Novel Microprocessor Architectures 63
Table 2.3 Characteristics of two different computer systems.
Characteristics A B
Clock cycle time (ns) 1.0 2.0
CPI 4.95 4.0
We will evaluate them using two implements of the same ISA. Applying
(2.7.8) we have:
For computer A:
For computer B:
Now, we need to calculate the performance ratio using (2.7.3),
Therefore, computer A is 1.61 times faster than computer B.
2.7.2 Analyzing the Performance in Multicore/Multiprocessor
Systems
The Amdahl’s law was proposed four decades ago by Gene Amdahl. It was
a mathematical formulation focused to know the expected ...