rss-ladder issues in Ubuntu 12.04 and 16.04

[sergey-dryabzhinsky]

Probably connected with #91

Ubuntu 12.04

TERM=screen-bce
LANG=en_US.UTF-8
LANGUAGE=en_US:en

# rss-ladder eth1 0
- distribute interrupts of eth1 (-rx-) on socket 0
lscpu: unrecognized option '--extended=CPU,SOCKET'

Ubuntu 16.04.2

TERM=xterm (xfce-terminal)
LANG=ru_RU.UTF-8
LANGUAGE=ru_RU:ru:en

# rss-ladder eth1 0
- distribute interrupts of eth1 (-rx-) on socket 0
  - eth1: irq 128 1572865-edge -> eth1-rx-0
/usr/local/bin/rss-ladder: строка 80: echo: ошибка записи: Недопустимый аргумент

---

• 12.04
• 16.04

[strizhechenko]

Hello!

12.04 issue is fixed in 2.0.5 version: #96

[sergey-dryabzhinsky]

Something wrong with number of cpu cores detection:

# rss-ladder eth1 0
- distribute interrupts of eth1 (-rx-) on socket 0
  - eth1: irq 46 eth1-rx-0 -> 0
- distribute interrupts of eth1 (-tx-) on socket 0
  - eth1: irq 47 eth1-tx-0 -> 0

# grep -P 'cores|siblings' /proc/cpuinfo | sort -u
cpu cores       : 2
siblings        : 2

Or network cart / driver not capable?

[strizhechenko]

This problem is described here:
#8

Your network card is capable, but this is beyond rss-ladder's duty I think.

Also, I just got an interesting idea. If you have router with 2 similar network cards, you can bind queues to cpus this way:

• eth1-rx - cpu0
• eth1-tx - cpu1
• ethX-rx - cpu1
• ethX-tx - cpu0

It should increase the cache hit rate of packets forwarding :)

[sergey-dryabzhinsky]

That interesting. I really have such router.

[strizhechenko]

I think we can close this issue with wontfix)