Date: Fri, 6 Aug 2010 19:03:25 +0200 From: Alexander Fiveg <pebu3op@googlemail.com> To: freebsd-net@freebsd.org Subject: problem with 82599 controller Message-ID: <201008061903.25659.pebu3op@googlemail.com>
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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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