Fwd: twe0 interrupt storm

Stanislav stanislav at corp.n9.ru
Wed Jun 18 20:23:34 UTC 2008

Dear Daniel,

I have moved two disks to motherboard controller, cvsuped sources to
7.0-STABLE and recompiled kernel and world. gmirrored disks (RAID-1).
Server worked good for about 6 hours, and than again,
interrupt storm detected on "irq22:"; throttling interrupt source

gans# vmstat -i
interrupt                          total       rate
irq1: atkbd0                           3          0
irq9: acpi0                            1          0
irq16: ohci0                           1          0
irq17: ohci1 ohci3                     1          0
irq18: ohci2 ohci4                     1          0
irq22: atapci0                1195017654      55266
cpu0: timer                     43244319       1999
cpu1: timer                     43244059       1999
Total                         1281506039      59265

last pid: 75968;  load averages:  2.54,  2.57,  2.60    up 0+06:01:20  20:20:15
292 processes: 1 running, 290 sleeping, 1 zombie
CPU: 21.8% user,  0.0% nice, 12.9% system,  0.6% interrupt, 64.7% idle
Mem: 1033M Active, 435M Inact, 379M Wired, 51M Cache, 210M Buf, 37M Free
Swap: 4128M Total, 296M Used, 3832M Free, 7% Inuse

Maybe there is a way not to move from hetzner? No additional devices
are attached to motherboard.

I remember that server worked on 6.2-STABLE without these storms, but
there were not so much processes.

Best Regards,

2008/6/15 Daniel Gerzo <danger at freebsd.org>:
> Hello Stanislav,
> Sunday, June 15, 2008, 12:40:57 PM, you wrote:
>> Dear Daniel,
>> Please tell me you had this storms only with 3ware 8006-2LP?
> Actually, I do have them on the boxes which do not have the raid
> controller. I have several boxes in hetzner. The ones that does not
> have any additional devices attached to the motherboard seem like not
> having the problem. However most of my machines have at least
> additional NIC device.
> Please note that my machines does not crash even when there is an
> interrupt storm. On the other hand, they suffer from some performance
> problems :/
> The funny thing is that after reboot there's some silent period of
> time, when the interrupts are OK. After the systems becomes to be
> loaded more, the interrupt rate increases unless it reaches around
> 350k interrupt rate...
> I have tried to play with the BIOS settings, nothing really helped.
>> Because as I remember on MSI motherboard controller, I have no
>> problems with FreeBSD 6.2, but when I upgraded to FreeBSD 7.0 that
>> storms appeared, but not so often as with 3ware.
>> P.S. Maybe I have to ask them to update BIOS? I am so happy with their
>> network and service,  don't want to move to another server...
> I have tried to ask them to update the BIOS in the past, AFAIR they
> replied that the BIOS update is up to me...
> --
> Best regards,
>  Daniel                            mailto:danger at FreeBSD.org

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