[zeromq-dev] ZeroMQ background threads

[Francesco]

However I realized that the API does not provide affinity control, which
can be controlled with the sched_setaffinity() API:
  https://linux.die.net/man/2/sched_setaffinity

Could we add a ZMQ_THREAD_AFFINITY option to zmq_ctx_set() ?

Thanks,
Francesco





2017-05-19 12:25 GMT+02:00 Francesco <francesco.montorsi at gmail.com>:

> Wow, great, I didn't know about ZMQ_THREAD_SCHED_POLICY and
> ZMQ_THREAD_PRIORITY, thanks!!
>
> Francesco
>
>
> 2017-05-19 12:20 GMT+02:00 Luca Boccassi <luca.boccassi at gmail.com>:
> > On Fri, 2017-05-19 at 11:58 +0200, Francesco wrote:
> >> Hi,
> >> I'm using ZeroMQ in an applications with several threads (up to 40).
> >> I noticed that in the "master" branch of ZeroMQ the background
> >> threads
> >> it creates are given a name. That's VERY useful, thanks!
> >
> > No problem. Had the same issue myself. One day I'd like to further
> > improve it to have more specific names (I/O, reaper, shutdown), but it
> > would require a lot more refactoring so for now all threads have the
> > same name.
> >
> >> However my question is: my application sets the affinity and the
> >> priority of all threads it creates explicitly. Of course it  cannot
> >> set the affinity/priority of ZMQ background threads.
> >> Is it possible to add an API to get the pthread_t (on Linux) or the
> >> generic thread handle (platform-dependent) associated with the ZMQ
> >> background threads?
> >>
> >> In that way my application would be able to set affinity and increase
> >> priority also of ZMQ background threads...
> >
> > There is already an API to set those. Check the manpage for
> > zmq_ctx_set, and the following options: ZMQ_THREAD_SCHED_POLICY
> > ZMQ_THREAD_PRIORITY
> >
> > Note that as the manpage says you need to set them before creating any
> > socket, immediately after creating the context.
> >
> > Kind regards,
> > Luca Boccassi
> > _______________________________________________
> > zeromq-dev mailing list
> > zeromq-dev at lists.zeromq.org
> > https://lists.zeromq.org/mailman/listinfo/zeromq-dev
>
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