problem with 82599 controller

[Jack Vogel]

What is the exact PCI ID of your adapter (pciconf -l)?

How is it configured, on what kind of hardware, how many queues does it
have,
etc, etc?

Jack




On Fri, Aug 6, 2010 at 10:03 AM, Alexander Fiveg <pebu3op at googlemail.com>wrote:

> Hello,
>
> the following problem I've faced while working with 82599-controller (ixgbe
> driver):
>
> - During packet capturing, after the number of received packets exceeds all
> allocated descriptors (ixgbe_rxd * ixgbe_num_queues), the next new incoming
> packets will be sometimes DMA'ed into the RAM incorrectly.
>
> Output from my tcpdump session:
>
> % tcpdump -i ix1
> ...
> 15:36:54.970343 IP 10.0.0.2.discard > 12.0.0.160.2200: UDP, length 58
> 15:36:55.070357 IP 10.0.0.2.discard > 12.0.0.161.2200: UDP, length 58
> 15:36:55.170373 c7:49:54:a8:00:0c (oui Unknown) > 35:c5:66:d7:df:e8 (oui
> Unknown), ethertype Unknown (0xd53b), length 100:
>        0x0000:  4d98 ed85 7537 3b6b 3b8f 7102 4b1c 2cd4  M...u7;k;.q.K.,.
>        0x0010:  41a8 2f3d 4faa fc8a a039 0fe2 5960 fad5  A./=O....9..Y`..
>        0x0020:  c8b0 964b b0e0 2213 6aa2 330c ef93 80a9  ...K..".j.3.....
>        0x0030:  6ac8 071b a9bd 0d51 ecca 94ba ac9c 873b  j......Q.......;
>        0x0040:  a83f aeb0 20f4 cfd9 d1fa 93f3 795c 7d20  .?..........y\}.
>        0x0050:  2993                                     ).
> 15:36:55.270388 IP 10.0.0.2.discard > 12.0.0.163.2200: UDP, length 58
> ...
>
> For packets generating I am using Linux kernel packet generator. The
> receive-
> and send-interfaces are connected directly (without any hops in the
> middle).
> By the each new generated packet the destination-IP-address will be
> incremented, so I can proof the correctness of received traffic.  This
> error
> appears in both -STABLE and -CURRENT
>
> I guess it is not a software bug and I would like to check out whether the
> controller is in order.
>
> Are there any test setups for 8259x controllers that I could use ?
>
> Thanks,
> Alex
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