RE: [ConnectX 6Dx]Issue using Tx scheduling feature in DPDK

[Antoine POLLENUS <a.pollenus@deltacast.tv>]

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Thanks for you answer,

Already red the doc on the subject but can't make it work in testpmd.
Didn't implemented it myself at this step but seams I'm missing something.

Do I need to enable a specific offload ?


From: Asaf Penso [mailto:asafp@nvidia.com]
Sent: lundi 2 mai 2022 09:59
To: Antoine POLLENUS <a.pollenus@deltacast.tv>; users@dpdk.org; Slava Ovsiienko <viacheslavo@nvidia.com>
Subject: RE: [ConnectX 6Dx]Issue using Tx scheduling feature in DPDK

Hello Antoine,

Have you had a look into mlx5 documentation?
http://doc.dpdk.org/guides/nics/mlx5.html
Please look for tx_pp.

I'm adding @Slava Ovsiienko<mailto:viacheslavo@nvidia.com> in case you need further support.

Regards,
Asaf Penso

From: Antoine POLLENUS <a.pollenus@deltacast.tv<mailto:a.pollenus@deltacast.tv>>
Sent: Thursday, April 28, 2022 3:25 PM
To: users@dpdk.org<mailto:users@dpdk.org>
Subject: [ConnectX 6Dx]Issue using Tx scheduling feature in DPDK

Hello,

DPDK Version: 21.11
Firmware version : 22.32.1010
MLNX_OFED version: MLNX_OFED_LINUX-5.5-1.0.3.2-ubuntu20.04-x86_64

We are trying to use the DPDK tx scheduling feature on a ConnectX6 DX adapter. We experience some issues with the feature not working.

The test is using Test-pmd in txonly mode.

Here are the command used:

sudo ./dpdk-testpmd -l 0-3 -n 4 -- -i --portmask=0x1 --nb-cores=1 --eth-peer=0,01:00:5e:00:00:08 --tx-ip=10.10.1.168,239.0.0.8
testpmd> set fwd txonly
testpmd> set burst 64
testpmd> set txtimes 1000000,10000

By doing this I expect the feature working. Am i missing something ?

I also added a print in txonly.c and clearly sees that the feature is not enabled

dynf = rte_mbuf_dynflag_lookup
(RTE_MBUF_DYNFLAG_TX_TIMESTAMP_NAME, NULL);
if (dynf >= 0)
timestamp_mask = 1ULL << dynf;
dynf = rte_mbuf_dynfield_lookup
(RTE_MBUF_DYNFIELD_TIMESTAMP_NAME, NULL);
if (dynf >= 0)
timestamp_off = dynf;

both function ( rte_mbuf_dynfield_lookup and rte_mbuf_dynflag_lookup) returns -1

I also tried to enabled the feature.

testpmd> port config 0 tx_offload send_on_timestamp on
but when doing this DPDK tells me that I don't have these offload capabilities

Hope you will be able to help me.

Regards

Antoine

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