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parallel-processinggnugnu-parallel
Remi.b
Remi.b

Reputation: 18219

GNU Parallel with processes that further fork

Consider the file Processes.txt

./MyProcess 1 -nbThreads 2
./MyProcess 2 -nbThreads 2
./MyProcess 3 -nbThreads 2

, where each MyProcess will attempt to use two cores. Now consider running

parallel -j 3 :::: Processes.txt

The call to parallel specifically indicate to use no more than 3 cores. Will parallel allow MyProcess to further fork and the whole thing will use 6 cores or will it somehow enforce the three processes MyProcess to using one core each only?

Upvotes: 1

Views: 43

Answers (1)

Ole Tange
Ole Tange

Reputation: 33685

It will run three processes at once and if they choose to create further processes it will neither know nor care.

(Hattip to: Mark Setchell)

Upvotes: 2

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