[dpdk-dev] TX IP checksum offloading

[dpdk-dev] TX IP checksum offloading

[Daniel Kaminsky]

Hi,

Did anyone had an experience using the PKT_TX_IP_CKSUM flag?
I have an application that generates IP traffic but whenever I try to set
this flag on (*m->ol_flags = PKT_TX_IP_CKSUM)* the rte_mbuf nothing is sent
out.
Retrieving that statistics from the ethernet device show zero for opackets
and oerrors.

I'm using ixgbe driver and DPDK 1.5.0-8 (from Intel) distribution.

Thanks,
Daniel

Re: [dpdk-dev] TX IP checksum offloading

[Benson, Bryan]

Hi Daniel,
I posted some findings yesterday that seem relevant.  Try using the ol flags when you use an RX free threshold below 32.

I am looking into what can be done to fix it for values of 32 and above.
http://dpdk.org/ml/archives/dev/2013-November/000724.html

Thanks,
Bryan Benson
________________________________________
From: dev [dev-bounces@dpdk.org] on behalf of Daniel Kaminsky [daniel.kaminsky@infinitelocality.com]
Sent: Thursday, November 07, 2013 4:52 AM
To: dev@dpdk.org
Subject: [dpdk-dev] TX IP checksum offloading

Hi,

Did anyone had an experience using the PKT_TX_IP_CKSUM flag?
I have an application that generates IP traffic but whenever I try to set
this flag on (*m->ol_flags = PKT_TX_IP_CKSUM)* the rte_mbuf nothing is sent
out.
Retrieving that statistics from the ethernet device show zero for opackets
and oerrors.

I'm using ixgbe driver and DPDK 1.5.0-8 (from Intel) distribution.

Thanks,
Daniel

Re: [dpdk-dev] TX IP checksum offloading

[Vladimir Medvedkin]

Hi,

Did you set
                m->pkt.vlan_macip.f.l2_len = sizeof(struct ether_hdr);
                m->pkt.vlan_macip.f.l3_len = sizeof(struct ipv4_hdr);
 fields?

Regards,
Vladimir


2013/11/7 Daniel Kaminsky <daniel.kaminsky@infinitelocality.com>

> Hi,
>
> Did anyone had an experience using the PKT_TX_IP_CKSUM flag?
> I have an application that generates IP traffic but whenever I try to set
> this flag on (*m->ol_flags = PKT_TX_IP_CKSUM)* the rte_mbuf nothing is sent
> out.
> Retrieving that statistics from the ethernet device show zero for opackets
> and oerrors.
>
> I'm using ixgbe driver and DPDK 1.5.0-8 (from Intel) distribution.
>
> Thanks,
> Daniel
>

Re: [dpdk-dev] TX IP checksum offloading

[Daniel Kaminsky]

Thanks Vladimir,

Setting those values made it work.

Daniel


On Thu, Nov 7, 2013 at 11:05 PM, Vladimir Medvedkin <medvedkinv@gmail.com>wrote:

> Hi,
>
> Did you set
>                 m->pkt.vlan_macip.f.l2_len = sizeof(struct ether_hdr);
>                 m->pkt.vlan_macip.f.l3_len = sizeof(struct ipv4_hdr);
>  fields?
>
> Regards,
> Vladimir
>
>
> 2013/11/7 Daniel Kaminsky <daniel.kaminsky@infinitelocality.com>
>
> > Hi,
> >
> > Did anyone had an experience using the PKT_TX_IP_CKSUM flag?
> > I have an application that generates IP traffic but whenever I try to set
> > this flag on (*m->ol_flags = PKT_TX_IP_CKSUM)* the rte_mbuf nothing is
> sent
> > out.
> > Retrieving that statistics from the ethernet device show zero for
> opackets
> > and oerrors.
> >
> > I'm using ixgbe driver and DPDK 1.5.0-8 (from Intel) distribution.
> >
> > Thanks,
> > Daniel
> >
>