Uneven load softirq

Infrastructure & Networking Adapters and Cables Ethernet Adapter Cards
1

Hello, i have few servers 100gbps, on one ubuntu 22.04 i noticed first 4 softirqd/64, 65, 66, 67 have more load% cpu than another processes, why ? on debian 11 all queues (63) load evenly cpu% and another 1-10-20-40gbps server i check it ixgbe load evenly all core.

check attached screenshot

irq2
irq21920×1080 186 KB

irq1
irq11920×1080 186 KB

Channel parameters for enp161s0f0np0:
Pre-set maximums:
RX: n/a
TX: n/a
Other: 512
Combined: 63
Current hardware settings:
RX: n/a
TX: n/a
Other: 0
Combined: 63

maybe on first 4 proccesses work rx 4 queues, tx work on all 63 ? how it check ?

2

Hi z3rom1nd3,

  1. Please confirm if you are using the latest MLNX OFED driver for the Nvidia(Mellanox) Adapters. You can run the command #ofed_info -s

  2. ixgbe is the driver for Intel Adapter cards. Please confirm that the question posted on the community is relevant to Mellanox/Nvidia Adapter.

  3. Are both, the Ubuntu 22.04 and Debian 11 host 100% identical?

Thanks,
Namrata.

3
  1. mlnx-en-5.7-1.0.2.0
  2. i mean what ixgbe NIC not have this problem…
  3. not 100%, but same traffic - vod (hls video)
4

Thank you for sharing the details. As the systems are not 100% identical, unfortunately, we cannot determine why the systems have a difference in output unless we can debug it further.

In order to perform a complete debug, a support ticket needs to be opened. This would require a valid support contract. You may reach out to our contracts team at Networking-Contracts@nvidia.com

Thanks,
Namrata.