All 3 presented the issue Linux srv1r730xd-007d 6.7.6-060706-generic #519475c5 SMP PREEMPT_DYNAMIC Wed Jul 2 09:22:01 CEST 2025 x86_64 x86_64 x86_64 GNU/Linux 2025-07-02 15:25:31 (247 MB/s)
Linux srv1r730xd-007d 6.7.6-060706-generic #cfc86a96 SMP PREEMPT_DYNAMIC Wed Jul 2 12:44:36 CEST 2025 x86_64 x86_64 x86_64 GNU/Linux 2025-07-02 15:36:30 (245 MB/s) Linux srv1r730xd-007d 6.7.6-060706-generic #fa658e37 SMP PREEMPT_DYNAMIC Wed Jul 2 10:33:41 CEST 2025 x86_64 x86_64 x86_64 GNU/Linux 2025-07-02 15:50:27 (230 MB/s) And just to confirm I tried again with the kernel from post #37 Linux srv1r730xd-007d 6.7.6-lp2107347s08-generic #202506091846 SMP PREEMPT_DYNAMIC Mon Jun 9 17:20:08 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux 2025-07-02 15:58:19 (331 MB/s) -- 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/2107347 Title: Severe Network Performance Regression with BCM57800/BCM57810 on Kernel 6.8.0-40 through 6.12.16 Status in linux package in Ubuntu: Confirmed Status in linux source package in Jammy: In Progress 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 6.12.17[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/v6.12.17/ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2107347/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
