problems with network on em

Sun Nov 21 09:21:28 UTC 2010

I just did testing with code from RELENG_8 and HEAD.
http://install.mif.vu.lt/FreeBSD/net1/
Testing until 10:50 was with the version from RELENG_8.
After it was testing with em driver from HEAD.
At 10:50 testing stopped because machine was not responsible from network,
luckly I have serial console access and machine was rebooted
(finally with "call cpu_reset()").
You can see smaller CPU load, but also 50% reduction of bandwith usage.

Regards, Rolandas Naujikas

On 2010.11.21, at 09:09, Naujikas Rolandas wrote:

> When comparing there (in HEAD) I found many changes, most of them are not related with my hardware.
> Would it compile on FreeBSD 8.1-RELEASE-p1 ?
> I could try on secondary router and test it again with 1Gbs traffic.
> 
> Regards, Rolandas Naujikas
> 
> On 2010.11.21, at 00:13, Jack Vogel wrote:
> 
>> I'd appreciate it if you could try and get the driver from HEAD, I will be
>> putting it into STABLE
>> next week, and it would be nice to see if it fixed your problem. It will
>> build in your STABLE
>> environment just fine, do you know how to do this, if not just say so and I
>> can give you
>> further details.
>> 
>> Regards,
>> 
>> Jack
>> 
>> 
>> On Sat, Nov 20, 2010 at 1:53 PM, Naujikas Rolandas <
>> Rolandas.Naujikas at mif.vu.lt> wrote:
>> 
>>> 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 |
>>>>>> 
>>>>> 
>>>>> 
>>> 
>>> 
> 