BTW, I'm not sure if comment #10 could helps or not -- just FYI. :-)
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https://bugs.launchpad.net/bugs/1521053
Title:
Network Performance dropping between vms on different location in
Azure
Status in linux package in Ubuntu:
Invalid
Status in linux source package in Vivid:
In Progress
Bug description:
[Impact]
Ubuntu VMs between different location in Azure , especially North Europe and
East Europe in this case, have network performance issue.
It should be around 100MB/s speed between them. but it's around 0.3MB/s when
dropping happens.
[Fix]
Upstream development
0d158852a8089099a6959ae235b20f230871982f ("hv_netvsc: Clean up two unused
variables")
It's affected over 3.19.0-28-generic (ubuntu-vivid)
[Testcase]
Make 2 VMs on North Europe, West Europe each.
Then run below test script
NE VM
- netcat & nload
while true; do netcat -l 8080 < /dev/zero; done;
nload -u M eth0 ( need nload pkg )
- iperf
iperf -s -f M
WE VM
- netcat
for i in {1..1000}
do
timeout 30s nc NE_HOST 8080 > /dev/null
done
- iperf
iperf -c HOST -f M
Network performance dropping can be seen frequently.
More Tests
http://pastebin.ubuntu.com/13657083/
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