----- Original Message -----
From: "Marek Salwerowicz" <marek_...@wp.pl>
To: "Steven Hartland" <kill...@multiplay.co.uk>; "Gerrit Kühn"
<gerrit.ku...@aei.mpg.de>
Cc: <freebsd-net@freebsd.org>
Sent: Friday, April 25, 2014 2:06 PM
Subject: Re: NFS over LAGG / lacp poor performance
W dniu 2014-04-25 14:55, Steven Hartland pisze:
----- Original Message ----- From: "Marek Salwerowicz" <marek_...@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
In that case I believe you've hard coded the number of queues, check
/boot/loader.conf
for references to this.
Regards
Steve
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