igb network lockups

[Jack Vogel]

Have you done any poking around, looking at stats to determine why the
hangs? For instance,
might your mbuf pool be depleted? Some other network resource perhaps?

Jack


On Mon, Feb 25, 2013 at 10:38 AM, Christopher D. Harrison <
harrison at biostat.wisc.edu> wrote:

>  Sure,
> The problem appears on both systems running with ALTQ and vanilla.
>     -C
>
> On 02/25/13 12:29, Jack Vogel wrote:
>
> I've not heard of this problem, but I think most users do not use ALTQ,
> and we (Intel) do not
> test using it. Can it be eliminated from the equation?
>
> Jack
>
>
> On Mon, Feb 25, 2013 at 10:16 AM, Christopher D. Harrison <
> harrison at biostat.wisc.edu> wrote:
>
>> I recently have been experiencing network "freezes" and network "lockups"
>> on our Freebsd 9.1 systems which are running zfs and nfs file servers.
>> I upgraded from 9.0 to 9.1 about 2 months ago and we have been having
>> issues with almost bi-monthly.   The issue manifests in the system becomes
>> unresponsive to any/all nfs clients.   The system is not resource bound as
>> our I/O is low to disk and our network is usually in the 20mbit/40mbit
>> range.   We do notice a correlation between temporary i/o spikes and
>> network freezes but not enough to send our system in to "lockup" mode for
>> the next 5min.   Currently we have 4 igb nics in 2 aggr's with 8 queue's
>> per nic and our dev.igb reports:
>>
>> dev.igb.3.%desc: Intel(R) PRO/1000 Network Connection version - 2.3.4
>>
>> I am almost certain the problem is with the ibg driver as a friend is
>> also experiencing the same problem with the same intel igb nic.   He has
>> addressed the issue by restarting the network using netif on his systems.
>> According to my friend, once the network interfaces get cleared, everything
>> comes back and starts working as expected.
>>
>> I have noticed an issue with the igb driver and I was looking for
>> thoughts on how to help address this problem.
>>
>> http://freebsd.1045724.n5.nabble.com/em-igb-if-transmit-drbr-and-ALTQ-td5760338.html
>>
>> Thoughts/Ideas are greatly appreciated!!!
>>
>>     -C
>>
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>
>
>