[zeromq-dev] Request Reply throughput

[Jasper Jaspers]

In my setup I have two nodes connected via a 10 gigabit switch.  I ran
iperf  and zeroMQ throughput (local_thr and remote_thr) to prove that I
could achieve full bandwidth and I'm able to:
iperf:
   [ ID] Interval       Transfer     Bandwidth
   [  3]  0.0-10.0 sec  11.5 GBytes  9.90 Gbits/sec

zeroMQ:
   message size: 500000 [B]
   message count: 10000
   mean throughput: 2474 [msg/s]
   mean throughput: 9896.000 [Mb/s]

I then wrote a simple zeroMQ request reply test application to measure the
"throughput" using REQ/REP socket.  In this application the client runs on
one node and sends N (10000) messages each of size M (500000) and waits for
the reply for each message.  The server running on another node receives
the messages and sends a simple acknowledgment reply message.  The client
calculates the "throughput" based on how long it took to send all messages
and receive all replies. I'm seeing that it takes about 11 seconds to
complete which gives a throughput of 0.12 Gbit /sec.  Are these results
expected due to the nature of the request reply sockets?  Should I expect
to be anywhere near the full 10Gbit bandwidth with this test?

-Jasper
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