From mboxrd@z Thu Jan  1 00:00:00 1970
From: Martin Weiser <martin.weiser@allegro-packets.com>
Subject: ixgbe: ierrors counter spuriously increasing in DPDK 2.1
Date: Wed, 21 Oct 2015 10:38:22 +0200
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Hi,

with DPDK 2.1 we are seeing the ierrors counter increasing for 82599ES
ports without reason. Even directly after starting test-pmd the error
counter immediately is 1 without even a single packet being sent to the
device:

=2E/testpmd -c 0xfe -n 4 -- --portmask 0x3 --interactive
=2E..
testpmd> show port stats all

  ######################## NIC statistics for port 0  ###################=
#####
  RX-packets: 0          RX-missed: 0          RX-bytes:  0
  RX-badcrc:  0          RX-badlen: 0          RX-errors: 1
  RX-nombuf:  0
  TX-packets: 0          TX-errors: 0          TX-bytes:  0
  #######################################################################=
#####

  ######################## NIC statistics for port 1  ###################=
#####
  RX-packets: 0          RX-missed: 0          RX-bytes:  0
  RX-badcrc:  0          RX-badlen: 0          RX-errors: 1
  RX-nombuf:  0
  TX-packets: 0          TX-errors: 0          TX-bytes:  0
  #######################################################################=
#####


When packet forwarding is started the ports perform normally and
properly forward all packets but a huge number of ierrors is counted:

testpmd> start
=2E..
testpmd> show port stats all

  ######################## NIC statistics for port 0  ###################=
#####
  RX-packets: 9011857    RX-missed: 0          RX-bytes:  5020932992
  RX-badcrc:  0          RX-badlen: 0          RX-errors: 9011753
  RX-nombuf:  0
  TX-packets: 9026250    TX-errors: 0          TX-bytes:  2922375542
  #######################################################################=
#####

  ######################## NIC statistics for port 1  ###################=
#####
  RX-packets: 9026250    RX-missed: 0          RX-bytes:  2922375542
  RX-badcrc:  0          RX-badlen: 0          RX-errors: 9026138
  RX-nombuf:  0
  TX-packets: 9011857    TX-errors: 0          TX-bytes:  5020932992
  #######################################################################=
#####


When running the exact same test with DPDK version 2.0 no ierrors are
reported.
Is anyone else seeing strange ierrors being reported for Intel Niantic
cards with DPDK 2.1?

Best regards,
Martin