Public bug reported:
When we was doing jumboframe networking test , the test failed with send
packet size>63488.
The setup we used was ESX server and two ubuntu 8.04.4 server 64bit Virtual
Machine, each with virtual e1000 nic.
We have debugged in our side and we determined it is not vmware related issue.
Steps to repro this issue:
1. Setup two ubuntu 8.04.4 server 64bit VM, with e1000 Network adapter and all
other default config.
2. Put these two VM in same network.
3. Run network test with netperf and netserver. Start netserver in host A,
listen to port 49167 for example,
Then in host B, run :
netperf -p 49167 -H HostA_IP -L HostB_IP -l 10 -t udp_stream -- -s 131072, -S
131072, -m 63488
We can see "0" through put for the test.
UDP UNIDIRECTIONAL SEND TEST from 192.168.136.62 (192.168.136.62) port 0
AF_INET to 192.168.136.61 (192.168.136.61) port 0 AF_INET
Socket Message Elapsed Messages
Size Size Time Okay Errors Throughput
bytes bytes secs # # 10^6bits/sec
262142 63488 60.00 286788 0 2427.67
124928 60.00 0 0.00
Note:
1. No issue found for ubuntu later versions like ubuntu 1104, 1110
2. No issue found for smaller packet size
3. If you have real e1000 nic, please try and see if could repro on physical
machine.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
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https://bugs.launchpad.net/bugs/1017915
Title:
ubuntu 8.04.4 server 64bit jumboframe with packet size>63488 failed on
VMware VM with virtual e1000 nic
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