Allow control over nthreads() when launching worker?

[droodman]

Thank you for this excellent package. I understand from the documentation that "whether worker execution is multi-threaded will depend on your operating system." But for my users, it would be very helpful to be able to control the number of threads when creating a worker, so the users don't need to know about and bother with system environment variables.

With Distributed.jl, one can do this. E.g.:

addprocs(1, exeflags="-t4")

creates a new, four-threaded instance.

Might the same functionality be added to Malt.jl?

[Pangoraw]

You can use exeflags when spawning the worker in Malt too (this should probably be added to the docs):

julia> w = Malt.Worker(exeflags=["--threads=3"]);

julia> Malt.remote_call_fetch(Threads.nthreads, w)
3

[droodman]

Ah, great. So then the documentation is incomplete, as well as incorrect, since the threading behavior doesn't only depend on the OS?. Is this undocumented exeflags option going to be a stable feature?

[Pangoraw]

Without exeflags setting --threads, then it fallbacks to the default julia behavior which is OS specific as the documentation indicates. Yes, it is a stable feature just currently undocumented as an oversight.