NFS over LAGG / lacp poor performance

[Marek Salwerowicz]

W dniu 2014-04-25 14:55, Steven Hartland pisze:
> ----- Original Message ----- From: "Marek Salwerowicz" <marek_sal at wp.pl>
>
>
>> W dniu 2014-04-25 14:01, Gerrit Kühn pisze:
>>> Thanks for your input. As far as I understood so far, there should
>>> be one
>>> igb queue created per cpu core in the system by default (and this is
>>> what
>>> I see on my system). But my irq rate looks quite high to me (and it is
>>> only on one of these queues).
>>
>>
>> My CPU has 8 cores:
>>
>> http://ark.intel.com/products/75267/Intel-Xeon-Processor-E5-2640-v2-20M-Cache-2_00-GHz
>>
>>
>> So why do I have only 1 queue ?
>
> What does "sysctl hw.igb.num_queues" report?

storage1% sysctl hw.igb.num_queues                           
hw.igb.num_queues: 1



>
> num_queues does default to 1 for Legacy or MSI so you might be hitting
> that.
>
> Do you see "Using MSIX interrupts with" in your dmesg?
storage% dmesg | grep MSIX                                   
igb0: Using MSIX interrupts with 2 vectors
igb1: Using MSIX interrupts with 2 vectors
igb2: Using MSIX interrupts with 2 vectors
igb3: Using MSIX interrupts with 2 vectors
igb0: Using MSIX interrupts with 2 vectors
igb1: Using MSIX interrupts with 2 vectors
igb2: Using MSIX interrupts with 2 vectors
igb3: Using MSIX interrupts with 2 vectors


-- 
Marek