Amdahl’s law - Example 1

Suppose that we are considering an enhancement that runs 10 times faster than the original machine but is usable only 40% of the time. What is the overall speedup gained by incorporating the enhancement?

Se = 10

F = 40/100 = 0.4

So = 1 / (( 1 - F) + F/Se)

= 1/ (0.6 + 0.4/10)

= 1/0.64 = 1.56.

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