[netperf-talk] Netperf Doc about internal processes and UDP packet loss

[cmanko at mpifr-bonn.mpg.de]

Hello,

I am writing my final thesis about a 10Gbit/s Ethernet connection. I have two 
identical PCs each with a Myricon 10GBASE SR NIC. I am trying to optimize the 
connection for a special project.

1. Does a documentation exist about the exact function of netperf (internal 
processes, data generation, memory usage and so on)? Unfortunately I do not 
have much time left. And I would appreciate if somebody could spare me 
studying the netperf source codes. Any doc would help.

2. I am using also the UDP_STREAM  test. On the transceiver site, I always get 
a throughput about 9910 Mbit/s, but on the receiver site I only get a 
throughput around 8700 Mbit/s.
I tested different setup and optimized the configurations.

MSI=1
WC=1
wcfifo=0 
timestamps=0
interrupt coalescing=75us

command: netperf -H host -C -c -l 60 -t UDP_STREAM -- -m 8972 -s 1M -S 1M

Has somebody an explanation for the packet loss?

Thank you very much!!

Christian Manko