[dpdk-users] Intel X550 Receive timestamping for all packets

[dpdk-users] Intel X550 Receive timestamping for all packets

[terry.montague.1980]

Hi all,
Has anyone tried modifying the ixgbe PMD driver to allow an Intel X550 card to insert the extra 8 bytes of data at the end of each receive message, the 8 bytes containing the receive SYSTIME  timestamp ?
I've adjusted TYPE in TSYNCRXCTL to be "all packets" and set TSIP_UT_EN. I get the 8 bytes of data appended to all packets, but the controller doesn't populate the memory - the contents are left unchanged when transmitted.
TS and TSIP are both set in the received RDESC descriptor (along with the receive byte count increasing by 8 bytes) so the adaptor is definitely doing something.
Any ideas anyone ?
Many thanks
Terry.
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From: Raul Negreiros <rauln@cpqd.com.br>
Date: Fri, 15 Sep 2017 16:30:56 -0300
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Subject: Re: [dpdk-users] Help with QinQ insertion on i40e
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Hi,

I didn't notice that the default configuration in the NIC's queue is to
disable TX offloading. I was using the 'rte_eth_tx_queue_setup' function
with the last parameter 'tx_conf' as NULL, in this way using the default
configuration.

After configure the 'txq_flags' attribute properly my issue was solved and
the offloading worked perfectly.

Best regards,

Raul Negreiros

On Thu, Sep 14, 2017 at 2:15 PM, Raul Negreiros <rauln@cpqd.com.br> wrote:

> Hi,
>
> I'm trying to insert QinQ in the packet using the offload feature, but
> unfortunately I'm unsuccessful.
>
> These are my steps:
> - On device configuration configuration:
> - call 'rte_eth_dev_set_vlan_offload' with the following flags:
> ETH_VLAN_STRIP_OFFLOAD, ETH_VLAN_EXTEND_OFFLOAD;
> - call 'rte_eth_dev_set_vlan_ether_type' twice with the inner and outer
> types.
> - On packet processing:
> - set the PKT_TX_QINQ_PKT flag on 'ol_flags' attribute;
> - fill the 'vlan_tci' and 'vlan_tci_outer'.
>
> Did I miss something?
>
> Obs: My interface's driver is i40e and the DEV_TX_OFFLOAD_QINQ_INSERT flag
> is
> active on tx capabilities.
>
> Obs2: I've found on 'drivers/net/i40e/i40e_ethdev.c' the following
> comment:
> "Apply double-vlan setting, not implemented yet" in i40e_dev_init_vlan
> function.
> May it means that actually is not possible to use QinQ insertion with this
> driver?
>
> Best regards,
>
> Raul Negreiros
>

Re: [dpdk-users] Intel X550 Receive timestamping for all packets

[Paul Emmerich]

Hi,

> terry.montague.1980@btinternet.com:
> Hi all,
> Has anyone tried modifying the ixgbe PMD driver to allow an Intel X550 card to insert the extra 8 bytes of data at the end of each receive message, the 8 bytes containing the receive SYSTIME  timestamp ?

I've had that open as a todo for a year or so, and I've implemented it after seeing your email :)

> I've adjusted TYPE in TSYNCRXCTL to be "all packets" and set TSIP_UT_EN. I get the 8 bytes of data appended to all packets, but the controller doesn't populate the memory - the contents are left unchanged when transmitted.
> TS and TSIP are both set in the received RDESC descriptor (along with the receive byte count increasing by 8 bytes) so the adaptor is definitely doing something.

My implementation is here: https://github.com/libmoon/libmoon/commit/52f0b8cab580c8cf0579a03324cf0ac7f697e6e9#diff-0977b88594c9ac952093605f7aa091dcL109
Tested on an X550 and it works fine as far as I can tell from looking at a few histograms of inter-arrival times.


Paul