[dpdk-users] Intel X550 packet receive length truncation (ixgbe PMD)

Wiles, Keith keith.wiles at intel.com
Tue Sep 26 03:50:32 CEST 2017

> On Sep 25, 2017, at 5:46 PM, terry.montague.1980 at btinternet.com 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.


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