From: Matthias Gatto <matthias.gatto@outscale.com>
To: users@dpdk.org
Subject: Re: [dpdk-users] vhost, vxlan, and nic TSO trouble.
Date: Mon, 2 May 2016 10:57:05 +0200 [thread overview]
Message-ID: <CAAsw5BdLFfi1K_SU12Z=6Mpy+xtXUELZgDaHgEOp97nZFvmYGA@mail.gmail.com> (raw)
In-Reply-To: <CAAsw5BdmsN2OyPaTE5z33dAs49mf3MXR-NyQF=G=-zKbNq_Kog@mail.gmail.com>
On Mon, Apr 25, 2016 at 3:49 PM, Matthias Gatto
<matthias.gatto@outscale.com> wrote:
> Hi,
> I'm working on a project using DPDK:
>
> We are receiving packets from a vhost interface, then we encapsulate
> them in vxlan packets, and finally we burst them into an ixgbe nic.
>
> We set txq_flags of ixgbe nic to 0 in order to use offloading capability.
>
> During encapsulation, we add vxlan header length to l2_len field inside mbuf.
> It seems that l3_len, l4_len and tso_segsz are already set by vhost.
>
> When we use iperf3 to test our architecture, it seems that:
> - Packets with PKT_TX_TCP_CKSUM and without PKT_TX_TCP_SEG have a
> correct checksum.
> - Packets with PKT_TX_TCP_CKSUM and with PKT_TX_TCP_SEG are segmented
> but have a bad checksum.
>
> Do you think I've missed something ?
>
> Thanks for your help
>
> -- Matthias Gatto.
ping
next parent reply other threads:[~2016-05-02 8:57 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAAsw5BdmsN2OyPaTE5z33dAs49mf3MXR-NyQF=G=-zKbNq_Kog@mail.gmail.com>
2016-05-02 8:57 ` Matthias Gatto [this message]
2016-05-02 9:10 ` Vivek Gupta
2016-05-02 13:20 ` Matthias Gatto
2016-04-25 14:24 Matthias Gatto
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