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[Bug 1521053] Re: Network Performance dropping between vms on different location in Azure

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Seyeong Kim <seyeong.kim@xxxxxxxxxxxxx>
Date: Fri, 04 Dec 2015 02:46:21 -0000
Reply-to: Bug 1521053 <1521053@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Description changed:

  [Impact]
  
- Ubuntu VM in Azure has network performance issue
- Normal bandwidth is 50MB/s ~ 100MB/s, but it's 0.3MB/s when dropping happens.
+ Ubuntu VMs between different location, especially North Europe and East Eruope in this case) in Azure 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)
  
  With this commit, I confirmed that the problem has gone by the testing.
  
  Test Logs
  http://pastebin.ubuntu.com/13657083/
  
  [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
+  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
+  iperf -c HOST -f M
  
- Network performance dropping can be seen frequently in nload graph.
+ Network performance dropping can be seen frequently.

** Description changed:

  [Impact]
  
- Ubuntu VMs between different location, especially North Europe and East Eruope in this case) in Azure have network performance issue.
+ Ubuntu VMs between different location, especially North Europe and East Europe in this case) in Azure 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)
  
  With this commit, I confirmed that the problem has gone by the testing.
  
  Test Logs
  http://pastebin.ubuntu.com/13657083/
  
  [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.

** Description changed:

  [Impact]
  
- Ubuntu VMs between different location, especially North Europe and East Europe in this case) in Azure have network performance issue.
+ Ubuntu VMs between different location, especially North Europe and East Europe in this case, in Azure 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)
  
  With this commit, I confirmed that the problem has gone by the testing.
  
  Test Logs
  http://pastebin.ubuntu.com/13657083/
  
  [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.

** Description changed:

  [Impact]
  
  Ubuntu VMs between different location, especially North Europe and East Europe in this case, in Azure 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)
- 
- With this commit, I confirmed that the problem has gone by the testing.
- 
- Test Logs
- http://pastebin.ubuntu.com/13657083/
  
  [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/

** Description changed:

  [Impact]
  
- Ubuntu VMs between different location, especially North Europe and East Europe in this case, in Azure have network performance issue.
+ 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 
+ More Tests
  http://pastebin.ubuntu.com/13657083/

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
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/

To manage notifications about this bug go to:
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References

[Bug 1521053] [NEW] Network Performance dropping between vms on different location in Azure
From: Seyeong Kim, 2015-11-30