If you wait for responses you have to wait on latency which can get much worse eg international 250ms your limit is 4 messages per second. You cannot do better
That why people build asynch systems...and why Doom/Quake use to spam UDP position updates - without waiting for an answer. Ben On Wed, Sep 19, 2012 at 11:21 AM, Maninder Batth <[email protected]>wrote: > Paul, > With messages being sent one way, via pub and sub sockets, i am getting a > very decent performance. About 80% of our network gets saturated. > The code is zserver.cpp and zclient.cpp > > But if i configure the software such that client only sends the next > message, after it has received a response from the server, the throughput > is really bad. > The code is zserver-ack1.cpp and zclient-ack1.cpp > The difference is that in the former case, i can get 110k messages per > second , whereas in the latter case, i can only get 1k messages per second. > The sockets that i use in latter case are of type REQ and REP. Am i using > wrong sockets type ? > > > > On Tue, Sep 18, 2012 at 9:38 PM, Maninder Batth > <[email protected]>wrote: > >> Paul, >> Thank you again for your help. Now with message copying, i am getting a >> throughput of .8Gb, which is what i would have expected on a 1Gb network. >> >> >> On Tue, Sep 18, 2012 at 4:20 PM, Paul Colomiets <[email protected]>wrote: >> >>> Hi Maninder, >>> >>> On Tue, Sep 18, 2012 at 10:21 PM, Maninder Batth >>> <[email protected]> wrote: >>> > Paul, >>> > Here is number of messages as seen by the server in one second. Each >>> message >>> > is 1024 byte excluding tcp/ip and zmq headers. Based on these numbers >>> and i >>> > am getting a throughput of 1.4 Gb/sec. >>> > Enclosed is the source code for the server and the client. >>> > >>> >>> Zeromq closes the message after sending. So you effectively send >>> messages of the zero length after first one. You should use >>> zmq_msg_copy (or whatever C++ API is there) before doing send() in >>> case you want to reuse message. >>> >>> -- >>> Paul >>> _______________________________________________ >>> zeromq-dev mailing list >>> [email protected] >>> http://lists.zeromq.org/mailman/listinfo/zeromq-dev >>> >> >> > > _______________________________________________ > zeromq-dev mailing list > [email protected] > http://lists.zeromq.org/mailman/listinfo/zeromq-dev > >
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