[Zesty] TSO doesn't work properly
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Triaged
|
Medium
|
Unassigned | ||
Zesty |
Triaged
|
Medium
|
Unassigned |
Bug Description
The TSO (TCP segmentation offload), By default it is shown to be ON, but actually aggregation doesn’t happen.
When turning it on again - aggregation is observed.
Same behavior for mlx4_en, mlx5_core, igb.
Steps to repro:
1.
root:~# uname -r
4.10.0-14-generic
2.
root:~# ethtool -i eno2
driver: igb
version: 5.4.0-k
firmware-version: 1.63, 0x800009fa
expansion-
bus-info: 0000:06:00.0
supports-
supports-test: yes
supports-
supports-
supports-
3.
root:~# ethtool -k eno2 | grep offload
tcp-segmentatio
udp-fragmentati
generic-
generic-
large-receive-
rx-vlan-offload: on
tx-vlan-offload: on
l2-fwd-offload: off [fixed]
hw-tc-offload: off [fixed]
4.
root@:~# ethtool -K eno2 gso off
5.
root@:~# ethtool -k eno2 | grep offload
tcp-segmentatio
udp-fragmentati
generic-
generic-
large-receive-
rx-vlan-offload: on
tx-vlan-offload: on
l2-fwd-offload: off [fixed]
hw-tc-offload: off [fixed]
6.
netperf -H 10.195.43.1 -l 4 -t TCP_STREAM -c -C -- -m 15000
Traffic size less or equal to 1514 is observed, despite the fact TSO is on.
7.
ethtool -K eno2 tso on
8.
netperf -H 10.195.43.1 -l 4 -t TCP_STREAM -c -C -- -m 15000
Traffic size of 64K is observed.
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 1678585
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.