From: Julien Meunier <julien.meunier@6wind.com>
To: "Zhu, Heqing" <heqing.zhu@intel.com>,
"Zhang, Helin" <helin.zhang@intel.com>,
"dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] i40e: cannot change mtu to enable jumbo frame
Date: Wed, 10 Feb 2016 11:53:39 +0100 [thread overview]
Message-ID: <56BB16B3.2040003@6wind.com> (raw)
In-Reply-To: <CAD16F236028A64DBBC0158B1636EA4512702A53@SHSMSX104.ccr.corp.intel.com>
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@dpdk.org] On Behalf Of Julien Meunier
> Sent: Tuesday, February 9, 2016 9:36 AM
> To: Zhang, Helin <helin.zhang@intel.com>; dev@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
next prev parent reply other threads:[~2016-02-10 10:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-09 16:35 Julien Meunier
2016-02-09 19:05 ` Zhu, Heqing
2016-02-10 10:53 ` Julien Meunier [this message]
2016-02-10 13:54 ` Ananyev, Konstantin
2016-02-10 15:20 ` Zhang, Helin
2016-02-12 14:08 ` Julien Meunier
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