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openmp
Rio Riko
Rio Riko

Reputation: 1

OpenMP using lock

Why the program did not speed up and become slower than the sequential version? Will it be faster if I change the lock to omp reduction?

The omp code for the calculation avgvalue

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Upvotes: 0

Views: 63

Answers (1)

Luiz Chagas Jr
Luiz Chagas Jr

Reputation: 149

You have multiple threads running a single critical command. That is basically just as efficient as a serial code since only one thread will execute at a time. And you are also adding overhead by creating multiple threads and having them wait on one another to finish their execution before they can execute.

I think that making a reduction would be faster, since there are optimizations for that command in OpenMP.

Upvotes: 1

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