Hello Neal, Monday, December 22, 2008, 11:07:32 PM, you wrote:
The threaded RT creates an OS thread for each CPU/core on the system and uses them to multiplex userland threads. These are context switched whenever they block/yield/gc and no priorities can be assigned.
not exactly. amount of OS threads created controlled by +RTS -N option to the program; unless program has special function that RTS calls to set up this value they are switched on every minor GC which by default occurs after each 256kb allocated which is rather frequent event
It seems like we could get some priority based scheduling (and still be slackers) if we allow marked green threads to be strictly associated with a specific OS thread (forkChildIO?).
forkOS creates new haskell thread and new OS thread specially for it -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com