[erlang-questions] NIF appropriateness, was: Re: Messing with heart. Port and NIF, which one is better?
Thu Feb 14 17:16:45 CET 2013
Max Lapshin wrote:
> Can enif_consume_timeslice help to mark nif-blocked pthread still active?
Creating custom threads is one way to do lengthy native work while being
nice to the VM.
Another way is to divide your work into smaller pieces and do repeated
calls from Erlang to your NIF until the work is done. This is where
enif_consume_timeslice (new in R16B) can be useful. You tell the runtime
system an estimation <http://tyda.se/search/estimation?w_lang=en> of how
much of the scheduling timeslice (about 1ms) you have consumed and
enif_consume_timeslice will return back if your timeslice is exhausted
Note that this is still co-operative scheduling. enif_consume_timeslice
does NOT do any preemptive scheduling itself, you need to voluntarily
return from your NIF in order to yield the scheduler thread to do other
For drivers, erl_drv_consume_timeslice will also be available in R16B.
/Sverker, Erlang/OTP, Ericsson
More information about the erlang-questions