problems with network on em

Sat Nov 20 21:53:22 UTC 2010

I don't know about version, but I'm using RELENG_8 branch only. It is FreeBSD 8-STABLE also.

Regards, Rolandas Naujikas

P.S. I just got ~1Gbit/s (125MB/s,115Kpps) forwarding traffic in testing (24 nodes was downloading a file with wget from server from another side of router), but finally there was some deadlock. I'm recovering the data on it.

On 2010.11.20, at 22:37, Jack Vogel wrote:

> Did you mean the 7.1.7 version from HEAD ?
> 
> Jack
> 
> 
> On Sat, Nov 20, 2010 at 11:18 AM, Naujikas Rolandas <
> Rolandas.Naujikas at mif.vu.lt> wrote:
> 
>> 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 |
>>> 
>> 
>> 