lagg/lacp poor traffic distribution

[Fabien Thomas]

On Dec 21, 2010, at 3:48 PM, Eugene Grosbein wrote:

> On 21.12.2010 20:41, Fabien Thomas wrote:
> 
>>>>> 1. Is it a bug or design problem?
>>>> 
>>>> How many queues have you with igb? If it's one it will explain why the flowid is bad for load balancing with lagg.
>>> 
>>> How do I know? I've read igb(4) manual page and found no words
>> vmstat -i will show the queue (intr for the queue) normally it's the number of CPU available.
> 
> # vmstat -i
> interrupt                          total       rate
> irq5: uart2                            8          0
> irq18: ehci0 uhci5+                    2          0
> irq19: uhci2 uhci4+                 2182          0
> irq23: uhci3 ehci1                   124          0
> cpu0: timer                     39576224       1993
> irq256: em0:rx 0               115571349       5822
> irq257: em0:tx 0               136632905       6883
> irq259: em1:rx 0               115829181       5835
> irq260: em1:tx 0               138838991       6994
> irq262: igb0:que 0             157354922       7927
> irq263: igb0:que 1                577369         29
> irq264: igb0:que 2                280207         14
> irq265: igb0:que 3                241826         12
> irq266: igb0:link                      2          0
> irq267: igb1:que 0             164620363       8293
> irq268: igb1:que 1                238678         12
> irq269: igb1:que 2                248478         12
> irq270: igb1:que 3                762453         38
> irq271: igb1:link                      3          0
> cpu2: timer                     39576052       1993
> cpu3: timer                     39576095       1993
> cpu1: timer                     39575913       1993
> Total                          989503327      49849
> 
> It seems I have four queues per igb card but only one of them works?

Yes.

Jack will certainly confirm but it seems that RSS hash does not seems to take vlan in account and default to queue0 ?


> 
> Eugene Grosbein