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[Bruno Chareyre <1112689@xxxxxxxxxxxxxxxxxx>]

Not really. Currently -jN means that all parallel engines are using N threads.
The idea of ompThreads is to use less than N threads for some engines.
A situation where it can be useful is when using ParallelEngine, probably not your case.

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https://bugs.launchpad.net/bugs/1112689

Title:
  ompThreads attribute not used in many engines

Status in Yet Another Dynamic Engine:
  Confirmed

Bug description:
  Although ompThreads is present in all engines due to inheritance, many
  of them will still use OMP_NUM_THREADS whatever ompThreads. It needs a
  scan of all parallelized engine to append this optional argument to
  the OMP pragmas.

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