CODEWITHSUNDEEP
performanceparallel-processing
jmt
jmt

Reputation: 97

Calculating parallel efficiency

When calculating parallel efficiency of a program running on a multi-core home PC using the equation:

Efficiency = Speedup / p

Would p represent the number of threads used in the program or the number of cores of the PC?

Upvotes: 0

Views: 4731

Answers (1)

Matthieu Durut
Matthieu Durut

Reputation: 4968

Usually, parallel efficiency is computed as Speedup / p where p represents the number of cores. Indeed, in a normal set-up, you are limited by the actual number of cores, not the number of threads.

Upvotes: 3

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