On 02/09/2016 08:05 PM, Zhu, Heqing wrote: > Helin is still in Chinese New Year Vacation. Will the below command option > help ? > > 4.5.9. port config - max-pkt-len > Set the maximum packet length: > > testpmd> port config all max-pkt-len (value) > This is equivalent to the --max-pkt-len command-line option. > > > -----Original Message----- > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Julien Meunier > Sent: Tuesday, February 9, 2016 9:36 AM > To: Zhang, Helin <helin.zhang at intel.com>; dev at dpdk.org > Subject: [dpdk-dev] i40e: cannot change mtu to enable jumbo frame > > Hello Helin, > > I tried to send jumbo frames to a i40e card. However, I observed that all > frames are dropped. Moreover, set_mtu function is not implemented on i40e PMD. > > > testpmd --log-level 8 --huge-dir=/mnt/huge -n 4 -l 2,18 --socket-mem > 1024,1024 -w 0000:02:00.0 -w 0000:02:00.2 -- -i --nb-cores=1 > --nb-ports=2 --total-num-mbufs=65536 > > ============= > Configuration > ============= > > +-----------+ +-------------+ > | | | | > | tgen | | | > | +----------+ port 0 | > | | | | > | | | | > | | | | > | | | | > | +----------+ port 1 | > | | | | > +-----------+ +-------------+ > > DPDK: DPDK-v2.2 > > ========== > MTU = 1500 > ========== > Packet sent from a tgen > > p = Ether / IP / UDP / Raw(MTU + HDR(Ethernet)- HDR(IP) - HDR(UDP)) > > len(p) = 1514 > > testpmd> start > PMD: i40e_rxd_to_vlan_tci(): Mbuf vlan_tci: 0, vlan_tci_outer: 0 > testpmd> stop > Telling cores to stop... > Waiting for lcores to finish... > PMD: i40e_update_vsi_stats(): *** VSI[13] stats start *** > PMD: i40e_update_vsi_stats(): rx_bytes: 1518 > PMD: i40e_update_vsi_stats(): rx_unicast: 1 > PMD: i40e_update_vsi_stats(): *** VSI[13] stats end *** > PMD: i40e_dev_stats_get(): *** PF stats start *** > PMD: i40e_dev_stats_get(): rx_bytes: 1514 > PMD: i40e_dev_stats_get(): rx_unicast: 1 > PMD: i40e_dev_stats_get(): rx_unknown_protocol: 1 > PMD: i40e_dev_stats_get(): rx_size_1522: 1 > PMD: i40e_dev_stats_get(): *** PF stats end *** > > -------------- Forward statistics for port 0 -------------- > RX-packets: 1 RX-dropped: 0 RX-total: 1 > TX-packets: 0 TX-dropped: 0 TX-total: 0 > > ---------------------------------------------------------------------------- > PMD: i40e_update_vsi_stats(): *** VSI[14] stats start *** > PMD: i40e_update_vsi_stats(): tx_bytes: 1514 > PMD: i40e_update_vsi_stats(): tx_unicast: 1 > PMD: i40e_update_vsi_stats(): *** VSI[14] stats end *** > PMD: i40e_dev_stats_get(): *** PF stats start *** > PMD: i40e_dev_stats_get(): tx_bytes: 1514 > PMD: i40e_dev_stats_get(): tx_unicast: 1 > PMD: i40e_dev_stats_get(): tx_size_1522: 1 > PMD: i40e_dev_stats_get(): *** PF stats end *** > > -------------- Forward statistics for port 1 -------------- > RX-packets: 0 RX-dropped: 0 RX-total: 0 > TX-packets: 1 TX-dropped: 0 TX-total: 1 > > ---------------------------------------------------------------------------- > > +++++ Accumulated forward statistics for all ports+++++ > RX-packets: 1 RX-dropped: 0 RX-total: 1 > TX-packets: 1 TX-dropped: 0 TX-total: 1 > > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > => OK > > ========== > MTU = 1600 > ========== > Packet sent > > p = Ether / IP / UDP / Raw(MTU + HDR(Ethernet)- HDR(IP) - HDR(UDP)) > > len(p) = 1614 > > testpmd> port config mtu 0 1600 > rte_eth_dev_set_mtu: Function not supported Set MTU failed. diag=-95 > testpmd> port config mtu 1 1600 > rte_eth_dev_set_mtu: Function not supported Set MTU failed. diag=-95 > testpmd> start > testpmd> stop > Telling cores to stop... > Waiting for lcores to finish... > PMD: i40e_update_vsi_stats(): *** VSI[13] stats start *** > PMD: i40e_update_vsi_stats(): rx_bytes: 1618 > PMD: i40e_update_vsi_stats(): rx_unicast: 1 > PMD: i40e_update_vsi_stats(): *** VSI[13] stats end *** > PMD: i40e_dev_stats_get(): *** PF stats start *** > PMD: i40e_dev_stats_get(): rx_bytes: 1614 > PMD: i40e_dev_stats_get(): rx_unicast: 1 > PMD: i40e_dev_stats_get(): rx_unknown_protocol: 1 > PMD: i40e_dev_stats_get(): rx_size_big: 1 > PMD: i40e_dev_stats_get(): *** PF stats end *** > > -------------- Forward statistics for port 0 -------------- > RX-packets: 1 RX-dropped: 0 RX-total: 1 > TX-packets: 0 TX-dropped: 0 TX-total: 0 > > ---------------------------------------------------------------------------- > PMD: i40e_update_vsi_stats(): *** VSI[14] stats start *** > PMD: i40e_update_vsi_stats(): tx_bytes: 0 > PMD: i40e_update_vsi_stats(): tx_unicast: 0 > PMD: i40e_update_vsi_stats(): *** VSI[14] stats end *** > PMD: i40e_dev_stats_get(): *** PF stats start *** > PMD: i40e_dev_stats_get(): tx_bytes: 0 > PMD: i40e_dev_stats_get(): tx_unicast: 0 > PMD: i40e_dev_stats_get(): tx_size_big: 0 > PMD: i40e_dev_stats_get(): *** PF stats end *** > > -------------- Forward statistics for port 1 -------------- > RX-packets: 0 RX-dropped: 0 RX-total: 0 > TX-packets: 0 TX-dropped: 0 TX-total: 0 > > ---------------------------------------------------------------------------- > > +++++ Accumulated forward statistics for all ports+++++ > RX-packets: 1 RX-dropped: 0 RX-total: 1 > TX-packets: 0 TX-dropped: 0 TX-total: 0 > > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > Done. > > => Frame correctly received on port 0, but never forwarded or xmit on port 1. > > Does a mtu_set function will be developed soon in order to support jumbo > frame ? > > Regards, > > -- > Julien MEUNIER > 6WIND >
On testpmd, this command enables jumbo frame, you are right. However, all ports need to be stopped: jumbo frame cannot be enabled at runtime through the DPDK API on i40e PMD. Other Intel PMD, like ixgbe, support this feature with the set_mtu API. Why not on i40e ? Regards, -- Julien MEUNIER 6WIND
