Hello Martin,
I did locally the following tests on a Linux machine (dual-core, 2.2GHz):
First I send 1000 messages of 1 byte, then 10000 of the same length.
Is the lower performance created by the ethernet driver by buffering of
messages?
-----------------
Linux-New:/home/Archive/RT-Linux/zeromq-2.0-beta2/perf/c # local_thr
"udp://192.168.178.126;224.0.0.1:5555" 1 1000
udp://192.168.178.126;224.0.0.1:5555 1 1000
^[[Amessage size: 1 [B]
message count: 1000
mean throughput: 13333333 [msg/s]
mean throughput: 106.667 [Mb/s]
Linux-New:/home/Archive/RT-Linux/zeromq-2.0-beta2/perf/c # local_thr
"udp://192.168.178.126;224.0.0.1:5555" 1 10000
udp://192.168.178.126;224.0.0.1:5555 1 10000
message size: 1 [B]
message count: 10000
mean throughput: 15112 [msg/s]
mean throughput: 0.121 [Mb/s]
--------------------
I don't really understand the results above. Please explain. The test
below was using 10000 messages with a length of 10 bytes:
--------------
Linux-New:/home/Archive/RT-Linux/zeromq-2.0-beta2/perf/c # local_thr
"udp://192.168.178.126;224.0.0.1:5555" 10 10000
udp://192.168.178.126;224.0.0.1:5555 10 10000
----------------
-> local_thr doesn't terminate. It seems we are loosing messages ?
Best Regards
Armin Steinhoff
Martin Sustrik wrote:
Hi Armin,
I have tried to run the examples* local_lat* and *remote_lat* with UPD
but got always the return code 93 -> Protocol not supported.
I know! The problem is that UDP is actually UDP encapsulation of PGM
reliable multicast protocol. So to have it available you have to specify
--with-pgm when doing configure.
One more comment: Latency tests use request/reply sockets which, quite
naturally, don't work over multicast. So you'll end up with error
anyway. The throughput tests should work though.
Martin
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