Hi Andriy, thank you, that solved it.
Regards, Angela Andriy Berestovskyy <aber at semihalf.com> wrote on 07/17/2015 04:37:45 PM: > From: Andriy Berestovskyy <aber at semihalf.com> > To: Angela Czubak/Poland/Contr/IBM at IBMPL, > Cc: dev at dpdk.org > Date: 07/17/2015 04:38 PM > Subject: Re: [dpdk-dev] Non-working TX IP checksum offload > > Cze?? Angela, > Make sure your NIC is configured properly as described in this thread: > http://dpdk.org/ml/archives/dev/2015-May/018096.html > > Andriy > > On Fri, Jul 17, 2015 at 4:23 PM, Angela Czubak <ACzubak at pl.ibm.com> wrote: > > Hi, > > > > I have some difficulties using ip checksum tx offload capabilities - I > > think I set everything as advised by the API documentation, but > > unfortunately the packet leaves the interface with its ip checksum still > > being zero (it reaches its destination). > > > > What I do is: > > buffer->ol_flags |= PKT_TX_IP_CKSUM|PKT_TX_IPV4; > > ip_header->hdr_checksum = 0; > > buffer->l3_len = sizeof(struct ipv4_hdr); > > buffer->l2_len = sizeof(struct ether_hdr); > > > > In L4 there's UDP, which checksum is zeroed if that matters. > > > > Is there something I am missing? The NIC is Intel Corporation Ethernet > > Controller X710 for 10GbE SFP+ (rev 01). > > > > What is more, is there any particular reason for assuming in > > i40e_xmit_pkts that offloading checksums is unlikely (I mean the line no > > 1307 "if (unlikely(ol_flags & I40E_TX_CKSUM_OFFLOAD_MASK))" at > > dpdk-2.0.0/lib/librte_pmd_i40e/i40e_rxtx.c)? > > > > Regards, > > Angela > > > > -- > Andriy Berestovskyy >
