Hi Shrivastav, Thanks.I suppose setting only
DEV_TX_OFFLOAD_MULTI_SEGS offload is required for IP fragmentation to taken into effect?Please confirm. One more query: I am attaching the pcap here which shows BAD UDP payload length( 736) greater than IP payload length (728). UDP payload length 736 is less than MTU (1500) so why I am getting this error. Whether this tx offload setting DEV_TX_OFFLOAD_MULTI_SEGS will really help solve this packet transmission issue. Only if the packet length > MTU then only I suppose packet would be fragmented based on tx offload setting DEV_TX_OFFLOAD_MULTI_SEGS. Best Regards, Suchetha On Mon, Apr 8, 2019 at 12:28 PM Shyam Shrivastav <shrivastav.sh...@gmail.com> wrote: > > The particular offload might be pure per port rather than per queue, > anyway you are enabling it at port level so no need to enable per queue. > > Documentation is available at > http://doc.dpdk.org/guides/prog_guide/poll_mode_drv.html , some relevant > excerpt > > The dev_info->[rt]x_queue_offload_capa returned from > rte_eth_dev_info_get() includes all per-queue offloading capabilities. > The dev_info->[rt]x_offload_capa returned from rte_eth_dev_info_get() > includes all pure per-port and per-queue offloading capabilities. Supported > offloads can be either per-port or per-queue. > > > > On Mon, Apr 8, 2019 at 7:18 AM Anupama Laxmi <anupamalax...@gmail.com> > wrote: > >> I would like to enable per port offloading to set TX offloading for >> multiple segments using DEV_TX_OFFLOAD_MULTI_SEGS. UDP packets were >> getting >> dropped with error Bad UDP length > IP payload length as seen in the >> wireshark capture. This issue is seen after I upgraded to DPDK 18.08. >> Hence >> I would like to set the offload DEV_TX_OFFLOAD_MULTI_SEGS per port to >> allow >> segmenation of big packets. >> >> I am getting the below error when I try to set the above offload. >> >> Ethdev port_id=0 tx_queue_id=0, new added offloads 0x9f3e55 must be within >> pre-queue offload capabilities 0x0 in rte_eth_tx_queue_setup() >> >> Please let me know where I am going wrong and how do I set the offload >> DEV_TX_OFFLOAD_MULTI_SEGS correctly. >> >> static const struct rte_eth_txconf tx_conf = { >> .tx_thresh = { >> .pthresh = TX_PTHRESH, >> .hthresh = TX_HTHRESH, >> .wthresh = TX_WTHRESH, >> }, >> .tx_free_thresh = 0, >> .tx_rs_thresh = 0, >> }; >> >> >> static struct rte_eth_conf port_conf = { >> .rxmode = { >> .mq_mode = ETH_MQ_RX_RSS, >> .max_rx_pkt_len = JUMBO_FRAME_MAX_SIZE, >> .split_hdr_size = 0, >> .offloads = (DEV_RX_OFFLOAD_CHECKSUM | >> DEV_RX_OFFLOAD_CRC_STRIP), >> }, >> .rx_adv_conf = { >> .rss_conf = { >> .rss_key = NULL, >> .rss_hf = ETH_RSS_TCP| ETH_RSS_UDP | >> ETH_RSS_TCP | ETH_RSS_SCTP, >> }, >> }, >> .txmode = { >> .mq_mode = ETH_MQ_TX_NONE, >> }, >> }; >> >> >> struct rte_eth_txconf *tx_conf; >> struct rte_eth_conf local_port_conf = port_conf; >> if(dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MULTI_SEGS) >> { >> >> local_port_conf.txmode.offloads |= DEV_TX_OFFLOAD_MULTI_SEGS; >> } >> ret = rte_eth_dev_configure(port, nbqueue, nbqueue, &local_port_conf); >> rte_eth_dev_info_get(port, &dev_info); >> tx_conf = &dev_info.default_txconf; >> tx_conf->offloads = local_port_conf.txmode.offloads; >> >> ret = rte_eth_tx_queue_setup(port, queue, >> RTE_TEST_TX_DESC_DEFAULT, >> master_socket_id, &tx_conf); >> > -------------- next part -------------- A non-text attachment was scrubbed... Name: bad_udp_length.png Type: image/png Size: 56015 bytes Desc: not available URL: <http://mails.dpdk.org/archives/users/attachments/20190409/9d6c4b1b/attachment.png>
