page fault in igb driver on 8.0-RC2

[Jack Vogel]

The storm threshold is a tuneable, like for 10G the default (1000) is
guaranteed
to be too low, we usually up it to 10000 in our lab. In this case its not
indicative
of a problem so just increase until it does not throttle the source.

Jack


On Thu, Nov 12, 2009 at 7:28 AM, Mike Tancsa <mike at sentex.net> wrote:

> At 05:19 PM 11/11/2009, Jack Vogel wrote:
>
>  Ya, so maybe a more robust solution to that failure would be a good
>> thing, but this is not the time for more elaborate code, having this small
>> fix put in is low risk and the better failure response can come later.
>>
>> In fact, I have a number of places in the ixgbe driver where I'm pondering
>> over what to do in failure mode anyway.
>>
>
> [trimming re at freebsd as this isnt a release issue]
>
> No panics yet, but at around 350k pps, I see
>
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
> interrupt storm detected on "irq257:"; throttling interrupt source
>
> 0(ich10)# vmstat -i
> interrupt                          total       rate
> irq16: uhci0+                         22          0
> irq18: ehci0 uhci5                    15          0
> irq19: fwohci0++                      78          0
> irq21: uhci1                          17          0
> irq23: uhci3 ehci1                     2          0
> cpu0: timer                    175404021       1998
> irq256: igb0                    19731770        224
> irq257: igb0                    30741918        350
> irq258: igb0                          14          0
> irq259: igb1                    71514077        814
> irq260: igb1                    28098687        320
> irq261: igb1                           2          0
> irq262: em0                      4435336         50
> irq263: ahci0                      89527          1
> cpu7: timer                    175395421       1998
> cpu6: timer                    175394148       1998
> cpu1: timer                    175395011       1998
> cpu4: timer                    175394583       1998
> cpu5: timer                    175395129       1998
> cpu3: timer                    175395466       1998
> cpu2: timer                    175394884       1998
> Total                         1557780128      17749
> 0(ich10)#
>
>
>
>
>
> --------------------------------------------------------------------
> Mike Tancsa,                                      tel +1 519 651 3400
> Sentex Communications,                            mike at sentex.net
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> Cambridge, Ontario Canada                         www.sentex.net/mike
>
>