[dpdk-dev] i40e: cannot change mtu to enable jumbo frame
Zhang, Helin
helin.zhang at intel.com
Wed Feb 10 16:20:21 CET 2016
> -----Original Message-----
> From: Julien Meunier [mailto:julien.meunier at 6wind.com]
> Sent: Wednesday, February 10, 2016 12:36 AM
> To: Zhang, Helin <helin.zhang at intel.com>; dev at dpdk.org
> Subject: 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 ?
Yes, we will implement soon later.
Could you help to try with max_pkt_len in port config for now?
Regards,
Helin
>
> Regards,
>
> --
> Julien MEUNIER
> 6WIND
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