[netperf-talk] Urgent UDP_Stream question

[Rick Jones]

Others have touched on what is going on, I'm just going to fill-in a 
bit.  As you see the netperf UDP_STREAM output has two lines.  The first 
line is in essence the rate at which netperf made successful send() 
calls.  The second line the rate of receives.  Not all "successful" send 
calls result in traffic on the network - this is why a netperf 
UDP_STREAM test may sometimes show a rate that is greater than 
link-rate.  Some platforms have intra-stack flow control which will keep 
netperf from reporting more than link rate. Sometimes those platform's 
intra-stack flow control don't always "work." Some platforms can return 
an error status (hence the existence of that error column) and some do 
nothing at all.


http://www.netperf.org/svn/netperf2/tags/netperf-2.5.0/doc/netperf.html#UDP_005fSTREAM

happy benchmarking,

rick jones