On 11/28/2016 10:33 AM, Rick Jones wrote:
On 11/17/2016 12:16 AM, Jesper Dangaard Brouer wrote:
time to try IP_MTU_DISCOVER ;)
To Rick, maybe you can find a good solution or option with Eric's hint,
to send appropriate sized UDP packets with Don't Fragment (DF).
Jesper -
Top of trunk has a change adding an omni, test-specific -f option which
will set IP_MTU_DISCOVER:IP_PMTUDISC_DO on the data socket. Is that
sufficient to your needs?
Usage examples:
raj@tardy:~/netperf2_trunk/src$ ./netperf -t UDP_STREAM -l 1 -H
raj-folio.americas.hpqcorp.net -- -m 1472 -f
MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
raj-folio.americas.hpqcorp.net () port 0 AF_INET
Socket Message Elapsed Messages
Size Size Time Okay Errors Throughput
bytes bytes secs # # 10^6bits/sec
212992 1472 1.00 77495 0 912.35
212992 1.00 77495 912.35
[1]+ Done emacs nettest_omni.c
raj@tardy:~/netperf2_trunk/src$ ./netperf -t UDP_STREAM -l 1 -H
raj-folio.americas.hpqcorp.net -- -m 14720 -f
MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to
raj-folio.americas.hpqcorp.net () port 0 AF_INET
send_data: data send error: Message too long (errno 90)
netperf: send_omni: send_data failed: Message too long
happy benchmarking,
rick jones
