Date: Sun, 2 Feb 2014 19:32:02 -0800 From: hiren panchasara <hiren.panchasara@gmail.com> To: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, Jack F Vogel <jfv@freebsd.org> Subject: Re: Errors using span interface on if_bridge(4) Message-ID: <CALCpEUH-5vWoU-Q-fWsmUGLrS3H--4WXcbejf1TQc=ZNmFOXvQ@mail.gmail.com> In-Reply-To: <CALCpEUE4V-CXkT3R0tzr1K075RBX_HKHPF%2BP-WTT15FkH5cuQA@mail.gmail.com> References: <CALCpEUH7YHhG3gw0wrObsJux=PWmJu2K6_tzCbCfXQ21ENYHdw@mail.gmail.com> <CALCpEUEuXR7_Q8_zt2TjnsOqt_rYMH5do=UEjssqkj684Xdimg@mail.gmail.com> <CALCpEUFLwZ6vismFKgyo1Q_P4iwzxS%2BjBozTV%2BO1kvap6U8brQ@mail.gmail.com> <CALCpEUE4V-CXkT3R0tzr1K075RBX_HKHPF%2BP-WTT15FkH5cuQA@mail.gmail.com>
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On Sun, Feb 2, 2014 at 11:19 AM, hiren panchasara
<hiren.panchasara@gmail.com> wrote:
> On Sat, Feb 1, 2014 at 5:16 PM, hiren panchasara
> <hiren.panchasara@gmail.com> wrote:
>
>>
>> -bash-4.2$ sysctl -a | grep mac_stats.checksum_errs
>> dev.ix.0.mac_stats.checksum_errs: 0
>> dev.ix.1.mac_stats.checksum_errs: 0
>> dev.ix.2.mac_stats.checksum_errs: 0
>> dev.ix.3.mac_stats.checksum_errs: 3371119 <-- most of them fail checksum
>
> In ixgbe.c :
> ixgbe_add_hw_stats() has
> SYSCTL_ADD_UQUAD(ctx, stat_list, OID_AUTO, "checksum_errs",
> CTLFLAG_RD, &stats->xec,
> "Checksum Errors");
>
> which is updated in ixgbe_update_stats_counters()
> adapter->stats.xec += IXGBE_READ_REG(hw, IXGBE_XEC);
>
> ixgbe_type.h defines
> #define IXGBE_XEC 0x04120
>
> So, this is something that firmware of the card updates? We just read
> that register from drivers.
ix3@pci0:66:0:1: class=0x020000 card=0x7a118086 chip=0x10fb8086
rev=0x01 hdr=0x00
vendor = 'Intel Corporation'
device = '82599EB 10-Gigabit SFI/SFP+ Network Connection'
class = network
subclass = ethernet
I found following in 82599 controller spec update:
http://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/82599-10-gbe-controller-spec-update.pdf#G2.1474004
http://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/82599-10-gbe-controller-spec-update.pdf#G2.2301787
Thought here I am sending unicast tcp traffic with iperf3.
Adding Jeff to get some more insights if possible.
cheers,
Hiren
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