problems with network on em

Naujikas Rolandas Rolandas.Naujikas at mif.vu.lt
Sat Nov 20 19:18:05 UTC 2010


I'm trying to test with newest version of /sys/dev/e1000 from FreeBSD 8-STABLE.
For that I'm using loadable module option, because it is easier to build with minimal changes in kernel source.
Only /sys/dev/e1000 and /sys/modules/em need to be updated.
Without changes in /sys/modules/em/Makefile it compiles, but have missing symbol or if you compile static kernel - the same problem.
Now I'm testing and it looks promising (except I see a little bigger kernel thread netisr cpu load, but it's acceptable).

Regards, Rolandas Naujikas

On 2010.11.20, at 19:05, Jeremy Chadwick wrote:

> On Sat, Nov 20, 2010 at 06:38:19PM +0200, Naujikas Rolandas wrote:
>> I just got another lockup.
>> It looks like in the time of lockup the number of Ierrs is increasing:
>> Name    Mtu Network       Address              Ipkts Ierrs Idrop    Opkts Oerrs  Coll
>> em2    1500 <Link#3>      00:14:4f:XX:XX:XX 13060395 18438     0  6579984     1     0
>> 
>> After "ifconfig em2 down;ifconfig em2 up" Ierrs stays at 0 rate for long time.
>> Without DEVICE_POLLING it was similar situation.
>> 
>> Regards, Rolandas Naujikas
>> 
>> On 2010.11.20, at 18:24, rolnas at gmail.com wrote:
>> 
>>> On 2010.11.20, at 17:54, Jeremy Chadwick wrote:
>>> 
>>>> On Sat, Nov 20, 2010 at 05:09:28PM +0200, rolnas at gmail.com wrote:
>>>>> I'm experiencing network interface stalls on em in FreeBSD 8.1-RELEASE (-p1).
>>>>> It looks like the problem could be solved in 8-STABLE, but should I upgrade to it ?
>>>>> Is it OK to try to get only em driver code and recompile as module and try to run it ?
>>>>> 
>>>>> sysctl dev.em.2.stats=1:
>>>>> ...
>>>>> em2: Missed Packets = 101334
>>>>> em2: Receive No Buffers = 488
>>>>> ...
>>>>> em2: RX overruns = 1356
>>>>> em2: watchdog timeouts = 1
>>>>> ...
>>>>> 
>>>>> Only "ifconfig em2 down;ifconfig em2 up" helps for some time.
>>>>> The same happens on em0 interface only, but not in the same time.
>>>>> It is production (NAT) router with pf+pfsync+carp and failover over another router.
>>>>> They are old "SunFire X4100" boxes (4GB RAM, 2*2 AMD Opteron 2.2GHz).
>>>> 
>>>> You're going to need to provide output from the following, run as root.
>>>> For the pciconf command, please only include the entry that's relevant
>>>> to the device in question (em2).  You can also XXX-out the MAC address
>>>> and/or IP addresses if you're worried about security.
>>>> 
>>>> $ pciconf -lvc
>>> 
>>> em2 at pci0:1:2:0: class=0x020000 card=0x10118086 chip=0x10108086 rev=0x03 hdr=0x00
>>>   vendor     = 'Intel Corporation'
>>>   device     = 'Dual Port Gigabit Ethernet Controller (Copper) (82546EB)'
>>>   class      = network
>>>   subclass   = ethernet
>>>   cap 01[dc] = powerspec 2  supports D0 D3  current D0
>>>   cap 07[e4] = PCI-X 64-bit supports 133MHz, 2048 burst read, 1 split transaction
>>>   cap 05[f0] = MSI supports 1 message, 64 bit 
>>> 
>>>> $ dmesg | grep em2
>>> 
>>> em2: <Intel(R) PRO/1000 Legacy Network Connection 1.0.1> port 0x9400-0x943f mem 0xfbfa0000-0xfbfbffff irq 24 at device 2.0 on pci1
>>> em2: [FILTER]
>>> em2: Ethernet address: 00:14:4f:XX:XX:XX
>>> 
>>>> $ sysctl dev.em.2
>>> 
>>> dev.em.2.%desc: Intel(R) PRO/1000 Legacy Network Connection 1.0.1
>>> dev.em.2.%driver: em
>>> dev.em.2.%location: slot=2 function=0
>>> dev.em.2.%pnpinfo: vendor=0x8086 device=0x1010 subvendor=0x8086 subdevice=0x1011 class=0x020000
>>> dev.em.2.%parent: pci1
>>> dev.em.2.debug: -1
>>> dev.em.2.stats: -1
>>> dev.em.2.rx_int_delay: 0
>>> dev.em.2.tx_int_delay: 66
>>> dev.em.2.rx_abs_int_delay: 66
>>> dev.em.2.tx_abs_int_delay: 66
>>> dev.em.2.rx_processing_limit: 100
>>> 
>>>> $ uname -a
>>> 
>>> FreeBSD sunfire1.mif 8.1-RELEASE-p1 FreeBSD 8.1-RELEASE-p1 #2: Thu Nov 18 10:39:07 EET 2010     root at sunfire1.mif:/home/local/obj/usr/src/sys/SUNFIRE  amd64
>>> 
>>> Recompiled with DEVICE_POLLING and HZ=2000, carp and many not used devices removed.
>>> 
>>>> $ netstat -ind -I em2
>>> 
>>> Name    Mtu Network       Address              Ipkts Ierrs Idrop    Opkts Oerrs  Coll Drop
>>> em2    1500 <Link#3>      00:14:4f:XX:XX:XX 66430440 101334     0 59339619     1     0    0 
>>> em2    1500 192.168.0.0/1 192.168.XX.XXX      633845     -     -  3815946     -     -    - 
>>> ...
>>> em0    1500 <Link#1>      00:14:4f:XX:XX:XX 167143400 152726     0 143900328     0     0    0 
>>> 
>>> Regards, Rolandas Naujikas
>>> 
>>>> Thanks.
> 
> Oops, I forgot requesting output from one other command:
> 
> $ vmstat -i
> 
> Adding Jack Vogel to the thread, who might have ideas/comments.  Jack,
> here's the thread:
> 
> http://lists.freebsd.org/pipermail/freebsd-stable/2010-November/060183.html
> 
> As for my comments:
> 
> Unidirectional errors (input or output) often indicates a duplex
> mismatch or some sort of weird "quirk" between one link partner and the
> other.  I *have* seen cases where both sides are auto-neg and one side
> acts like it has the wrong duplex selection despite ifconfig reporting
> full-duplex and the switch reporting full.  Forcing speed and duplex on
> both ends (requires a managed switch; please don't try this with a
> generic consumer switch) resolved the problem.
> 
> It could be that there's a driver bug causing this to happen -- down/up
> seems to indicate that could be the case -- but every situation needs to
> be addressed individually.
> 
> -- 
> | Jeremy Chadwick                                   jdc at parodius.com |
> | Parodius Networking                       http://www.parodius.com/ |
> | UNIX Systems Administrator                  Mountain View, CA, USA |
> | Making life hard for others since 1977.              PGP: 4BD6C0CB |
> 



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