Can you please run both ethtool -k <faulty_device> and, after a
download, ethtool -S <faulty_device> on both the faulty (6.12.17) and
working (6.12.18) mainline kernels and provide results?
Also bug is missing general log files that will aid in diagnosing the
problem. From a terminal window please run:
apport-collect 2107347
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 these commands, please add a comment stating that and change the
bug status to 'Confirmed'.
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Edoardo Canepa (ecanepa)
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/2107347
Title:
Severe Network Performance Regression with BCM57800/BCM57810 on Kernel
6.8.0-38 through 6.12.17
Status in linux package in Ubuntu:
Incomplete
Bug description:
Significant network performance degradation when using Broadcom
BCM57800/BCM57810 (bnx2x) NICs with jumbo frames on Ubuntu Jammy with
kernels starting from 6.8.0-38, with the issue becoming severe and
rendering the system unusable from 6.8.0-40 onwards.
There is a similar report here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2098961
However, the proposed fix in that report does not resolve the issue for
BCM57800 using the bnx2x driver.
Environment:
OS: Ubuntu 22.04(Jammy Jellyfish)
Current HWE Kernel: 6.8.0-57.59~22.04.1
NIC: Broadcom BCM57800 / BCM57810
Driver: bnx2x
Observed Behavior:
Noticeable network degradation begins in kernel 6.8.0-38
Becomes unusable in kernel 6.8.0-40 and beyond
Still reproducible in latest HWE kernel 6.8.0-57
Lowering the MTU to 1500 increases performance
Expected Behavior:
Stable and performant network performance as seen in previous kernel versions
Additional Notes: As mentioned in LP#2098961, the issue appears to be
fixed in kernel 6.12.18[0].
Request that this fix be backported or that further investigation be
made into kernel regressions affecting bnx2x on these NICs.
[0] https://kernel.ubuntu.com/mainline/v6.12.18/
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