[netperf-talk] Question on UDP test

Jay Kim jay.m.kim at samsung.com
Fri Jan 4 01:04:00 PST 2008


Hi, I have a simple question on UDP_STREAM test result.
I've got the following result, but I wonder why the throughput is measured only at client side.

UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.2.50.1 (10.2.50.1) port 0 AF_INET
Socket  Message  Elapsed      Messages                
Size    Size     Time         Okay Errors   Throughput
bytes   bytes    secs            #      #   10^6bits/sec

2097152   65507   10.00         960      0      50.29
2097152           10.00           0              0.00

Since UDP is a unidirectional flow, I think the actual throughput should be measured at netserver side, not at netperf side.
However, I couldn't find out any messages from netserver side.

To me, the throughput value (50.29Mbps) measured at netperf side looks only a 'send rate', not 'receive rate'.
Please explain how netperf measures the UDP throughput. Thanks.

- jay


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