Thank you for the clarification. If I understand it correctly, these callbacks in case of go 'threads' resume the parked state machine, so if there is a blocking IO inside go block, it ends up waiting in one of these callbacks, thus tying up a thread from a fixed sized pool until IO operation unblocks it.
JW On Friday, January 31, 2014 4:51:11 AM UTC+1, tbc++ wrote: > > To quote Jozef "it can happen all in one thread". This is somewhat true, > there are some rare situations where this can happen, but it is fairly > rare. > > Many times putting a value into a channel will mean that the callback on > the other end of the channel needs to be dispatched. In that case Mauricio > is correct, these callbacks are executed in a fixed sized thread pool. > > Timothy > > > On Thu, Jan 30, 2014 at 8:41 PM, Mauricio Aldazosa < > mauricio...@ciencias.unam.mx <javascript:>> wrote: > >> >> On Thu, Jan 30, 2014 at 12:48 PM, Jozef Wagner >> <jozef....@gmail.com<javascript:> >> > wrote: >> >>> >>> go blocks, together with >!, <!, alt!, etc... do not create any new >>> threads and are not run in separate thread. There is no thread pool for go >>> blocks. >>> >> >> I thought that go blocks do run in a thread pool of size 42 + (2 * Num of >> processors). In the definition of the go macro there is a >> dispatch/run<https://github.com/clojure/core.async/blob/master/src/main/clojure/clojure/core/async.clj#L369>whose >> >> docstring<https://github.com/clojure/core.async/blob/master/src/main/clojure/clojure/core/async/impl/dispatch.clj#L19>says >> it uses a thread pool. >> >> Am I misunderstanding something? >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clo...@googlegroups.com<javascript:> >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+u...@googlegroups.com <javascript:> >> For more options, visit this group at >> http://groups.google.com/group/clojure?hl=en >> --- >> You received this message because you are subscribed to the Google Groups >> "Clojure" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to clojure+u...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > > > -- > “One of the main causes of the fall of the Roman Empire was that–lacking > zero–they had no way to indicate successful termination of their C > programs.” > (Robert Firth) > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
