| 2018-10-09 14:02:01 |
Calvin Cheng |
bug |
|
|
added bug |
| 2018-10-09 14:02:01 |
Calvin Cheng |
attachment added |
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apport.linux-image-4.15.0-36-generic.nmd9d_ts.apport https://bugs.launchpad.net/bugs/1796895/+attachment/5199106/+files/apport.linux-image-4.15.0-36-generic.nmd9d_ts.apport |
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| 2018-10-09 14:30:07 |
Ubuntu Kernel Bot |
linux (Ubuntu): status |
New |
Incomplete |
|
| 2018-10-09 15:13:43 |
Calvin Cheng |
linux (Ubuntu): status |
Incomplete |
Confirmed |
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| 2018-10-09 17:11:38 |
Joseph Salisbury |
nominated for series |
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Ubuntu Bionic |
|
| 2018-10-09 17:11:38 |
Joseph Salisbury |
bug task added |
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linux (Ubuntu Bionic) |
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| 2018-10-09 17:11:43 |
Joseph Salisbury |
linux (Ubuntu Bionic): importance |
Undecided |
High |
|
| 2018-10-09 17:11:46 |
Joseph Salisbury |
linux (Ubuntu): importance |
Undecided |
High |
|
| 2018-10-09 17:11:49 |
Joseph Salisbury |
linux (Ubuntu Bionic): status |
New |
Confirmed |
|
| 2018-10-09 17:11:57 |
Joseph Salisbury |
tags |
|
bionic performing-bisect |
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| 2018-10-09 17:15:25 |
Joseph Salisbury |
linux (Ubuntu): assignee |
|
Joseph Salisbury (jsalisbury) |
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| 2018-10-09 17:15:28 |
Joseph Salisbury |
linux (Ubuntu Bionic): assignee |
|
Joseph Salisbury (jsalisbury) |
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| 2018-10-09 19:11:59 |
Joseph Salisbury |
linux (Ubuntu Bionic): status |
Confirmed |
Fix Committed |
|
| 2018-10-09 19:12:02 |
Joseph Salisbury |
linux (Ubuntu): status |
Confirmed |
Fix Released |
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| 2018-10-13 21:53:11 |
Will Brown |
bug |
|
|
added subscriber Will Brown |
| 2018-10-17 16:26:10 |
Vinson Lee |
bug |
|
|
added subscriber Vinson Lee |
| 2018-10-19 11:34:53 |
seuffert |
bug |
|
|
added subscriber seuffert |
| 2018-10-21 21:22:05 |
Will Brown |
linux (Ubuntu Bionic): status |
Fix Committed |
Fix Released |
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| 2018-10-22 21:37:33 |
Adam Eijdenberg |
bug |
|
|
added subscriber Adam Eijdenberg |
| 2018-10-29 20:02:00 |
James Troup |
linux (Ubuntu Bionic): status |
Fix Released |
Fix Committed |
|
| 2018-10-29 20:02:24 |
James Troup |
bug |
|
|
added subscriber The Canonical Sysadmins |
| 2018-10-29 20:02:48 |
James Troup |
description |
Hardware:
HP DL380 Gen 7 server with Gigabit interface.
Ubuntu release: 18.04.1
Since upgrading from 4.15.0-33 to 4.15.0-36, I have noticed a dramatic slowdown in TCP over IPv6.
Set up: two servers, Server A in US on Ubuntu 18.04.1, Server B in Europe.
Test: Sending 400MB over TCP from Server B to Server A.
With 4.15.0-33 on Server A, the transfer is completed in 24 seconds, with average speed of 139 mbps.
With 4.15.0-36 on Server A, the same amount of data is transferred in 369 seconds, average speed less than 9 mbps.
Looking at the result from tcpdump, I see that the there is a big difference in the TCP Window size.
With 3.15-0.33 the TCP window size is around 30000. But with 3.15-0.36, the window size is only 734. |
Hardware:
HP DL380 Gen 7 server with Gigabit interface.
Ubuntu release: 18.04.1
Since upgrading from 4.15.0-33 to 4.15.0-36, I have noticed a dramatic slowdown in TCP over IPv6.
Set up: two servers, Server A in US on Ubuntu 18.04.1, Server B in Europe.
Test: Sending 400MB over TCP from Server B to Server A.
With 4.15.0-33 on Server A, the transfer is completed in 24 seconds, with average speed of 139 mbps.
With 4.15.0-36 on Server A, the same amount of data is transferred in 369 seconds, average speed less than 9 mbps.
Looking at the result from tcpdump, I see that the there is a big difference in the TCP Window size.
With 4.15-0.33 the TCP window size is around 30000. But with 4.15-0.36, the window size is only 734. |
|
| 2019-07-24 20:56:20 |
Brad Figg |
tags |
bionic performing-bisect |
bionic cscc performing-bisect |
|
| 2021-05-13 02:23:05 |
lynn |
linux (Ubuntu Bionic): status |
Fix Committed |
Fix Released |
|
