Polling is supposed to be a non-busy wait so there should not be any CPU usage while waiting on the sockets. I know this works on the Java version.
Joshua On 2/3/2012 4:25 PM, Sergey Malov wrote: > I've checked it with different version of Scala 0mq binding, and it behaves > as expected: setting polling time to 0.5sec decrease CPU usage to almost zero. > It seems version I used before (0.0.4) has a polling bug. > > On 2012-02-03, at 2:40 PM, Chuck Remes wrote: > >> On Feb 3, 2012, at 1:36 PM, Sergey Malov wrote: >> >>> Hi, >>> I have an application using three different 0mq socket types: >>> - PULL, to receive protocol buffer messages from outside for further >>> processing, >>> - PUB, to publish results (in protocol buffer format as well) >>> - REPLY, to occasionally answer on status query, etc >>> >>> All sockets are being polled in single cycle. It's a Scala application, >>> using scala zeromq binding, and 2.1.11 0mq library. >>> What I observe, being idle this app still utilizes more than 100-120% CPU >>> on 4-cores linux box (using top utility). Under "idle" I mean that it is >>> started and polling sockets, but notching is there to pull/publish. >>> I played with setting timeout (using setTimeout on poller), latest I've set >>> was to 2000000 microseconds, with no obvious effect on CPU usage. I know >>> that most of the time it spends polling, since I monitor it with profiler. >>> >>> Is it normal, such a high CPU utilization? Is there anything wrong with >>> what I'm doing? Something I should check/set ? >> Try setting the timeout period to 1 second. If you still see high CPU then >> it's likely a bug in the Scala or Java binding. With a 1s timeout, cpu >> utilization should be 0. >> >> cr >> >> >> _______________________________________________ >> zeromq-dev mailing list >> zeromq-dev@lists.zeromq.org >> http://lists.zeromq.org/mailman/listinfo/zeromq-dev > _______________________________________________ > zeromq-dev mailing list > zeromq-dev@lists.zeromq.org > http://lists.zeromq.org/mailman/listinfo/zeromq-dev _______________________________________________ zeromq-dev mailing list zeromq-dev@lists.zeromq.org http://lists.zeromq.org/mailman/listinfo/zeromq-dev
