HI Keith, I'm not using pktgen - I am just experiencing what appears to be the same effect - I see receive data truncation to 1024bytes on incoming Rx datagrams.
If I then increase the MBUF size to 2048 + 128, I can receive 1500 byte datagrams, but after receiving 31 of them (or what appears to rx_free_thresh - 1) the Rx stops, although the ret_eth_stats_get() ipackets fields shows that the total number of datagrams I'm sending into the adaptor is being processed. Looks to be a RX ring problem? I'm using DPDK 17.05 Terry ----Original message---- >From : [email protected] Date : 26/09/17 - 02:50 (BST) To : [email protected] Cc : [email protected] Subject : Re: [dpdk-users] Intel X550 packet receive length truncation (ixgbe PMD) > On Sep 25, 2017, at 5:46 PM, [email protected] wrote: > > Hi all, > I appear to have stumbled into the problem where received data coming into > the X550 (ixgbe PMD) is truncated in length to 1024 bytes. > I've followed this issue : https://github.com/pktgen/Pktgen-DPDK/issues/103 > and adjusted the size of the mbufs created by rte_pktmbuf_pool_create() to be > RTE_MBUF_DEFAULT_DATAROOM + RTE_PKTMBUF_HEADROOM : i.e. 2048 + 128 bytes. > However, the receive side now stops receiving packets, 31 packets after > startup. If I change the value of rxConfig.rx_free_thresh sent into > rte_eth_rx_queue_setup() to 64, then it stops after 63 incoming packets. > Any ideas anyone ? What am I doing wrong? What is the version of DPDK and Pktgen you are using? > Many thanks > Terry. Regards, Keith
