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[feature request] user defined priorities of automatic threading layer choice #4486
Description
Activity
Yes, the default is
tbb, omp, workqueue.@stuartarchibald, you have thought about this more than I have.
I think that this request is feasible and can be accommodated without breaking anyone relying on the current behaviour. @ickc would you perhaps be interested in providing a patch and tests? Thanks.
Feature request
In https://numba.pydata.org/numba-doc/dev/user/threading-layer.html, it is shown how to select the 3 available threading layers.
This feature request concerns setting relative priorities between this 3 threading layers. i.e. I still want Numba to automatically choose one for me, but I want to specify the priorities between them. For example if the first is not available, fall back to lower priority ones.
The priority I want to set is
'omp', 'tbb', 'workqueue'. By the way, is the current behavior having the priority of'tbb', 'omp', 'workqueue', i.e.tbbis chosen first, and if not available fall back toomp, etc.?