> > > I have a question about the app_threads parameter of the zmq_init() call. > > My application creates thread on user request which may use a ZMQ > > socket. I am not able to know in advance what will be the exact number > > of threads running in my application. > > Which value can I give to this app_threads parameter in this case? > > Do I have to inform the ZMQ context that a new thread has been created > > (or distroyed)? > > There's no such way. 0MQ needs to know max number of threads in advance > so that it can initialise the lock-free infrastructure (channels between > individual threads). > > However, note the app_thread is max number of threads that can open 0MQ > sockets _in parellel_. This means that once thread X closes all the > socket it owns, another thread can take its place. > > Thus I would just estimate how many threads are going to use 0MQ in > parallel (10, 100, 1000?) and set the context accordingly. >
You start getting invalid value when you set app_threads above 63. Line 226 in zmq.cpp. I imagine there is a good reason for this limitation?
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