Number of threads in haskell program

chessai . chessai1996 at
Wed Mar 4 06:32:05 UTC 2020

Hi devs,

Recently I became interested in obtaining the rough number of (non-GC)
threads that are alive in a Haskell program. Intuitively this seemed
like something that the RTS would expose in some way - but I couldn't
find any such exposition in base. I then thought that I could simply
total the size of each run_queue_hd in each capability, but the
machinery for doing that doesn't seem to be exposed. Any thoughts?


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