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Date: Mon, 21 Sep 2015 10:17:02 -0400
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From: Kyle Larose <eomereadig@gmail.com>
To: "Van Haaren, Harry" <harry.van.haaren@intel.com>
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Subject: Re: [dpdk-dev] IXGBE error statistics
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On Mon, Sep 21, 2015 at 9:45 AM, Van Haaren, Harry
<harry.van.haaren@intel.com> wrote:
>> From: Igor Ryzhov [mailto:iryzhov@arccn.ru]
>> Thank you, I'll wait for result of mspdc testing.
>
> Hi Igor,
>
> Regarding your original question:
> The datasheet says that a packet with total size < 32 bytes is
> discarded by MAC layer and counted in the mspdc register.
>
> If possible, I would like to add a test for this type of packet when
> testing the accuracy of xstats. I've tried using a packet generator
> (48 bytes seems the smallest it is willing to generate for me), and
> using another NIC won't work, as smaller packets are padded to
> 64 bytes on TX.
>
> Do you have a method of reproducing this < 32 byte mspdc error packet?
> -Harry

Can you disable the MAC padding on the NIC through a backdoor register access?