[dpdk-users] Can't start DPDK applications on Mellanox ConnectX-4 card

[Sebastian Bernauer]

Hi Ori,


thanks for your helpful response!

The command "sudo ./l2fwd -w 04:00.0,dv_flow_en=0 -- -p 0x1" worked perfectly for me. Thanks!

Strangely on another server, exact the same server model and card, the card works with the flow option enabled (,dv_flow_en=1).

ibv_devinfo shows exact the same fw_version vendor_id, board_id etc.


Thanks,

Sebastian

On 05.01.20 08:09, Ori Kam wrote:

Hi Sebastian,

My Name is Ori and I'm part of Mellanox DPDK team.

I'm sorry to hear you encountered some issues.

I will try to help you.
2 questions:
1. Can you tell me if the HAVE_MLX5DV_DR is defined?
2. can you please try adding device parameter ,dv_flow_en=0 and let me know if it works?

Thanks,
Ori Kam




-----Original Message-----
From: users <users-bounces at dpdk.org><mailto:users-bounces at dpdk.org> On Behalf Of Sebastian Bernauer
Sent: Friday, January 3, 2020 5:08 PM
To: users at dpdk.org<mailto:users at dpdk.org>
Subject: [dpdk-users] Can't start DPDK applications on Mellanox ConnectX-4
card

Sorry for the duplicate post.

I found the line that returns the error.

In drivers/net/mlx5/mlx5_flow_dv.c, starting at line 6358:
-------------------------------
cache_matcher->matcher_object =
         mlx5_glue->dv_create_flow_matcher(sh->ctx, &dv_attr, tbl->obj);
     if (!cache_matcher->matcher_object) {
         rte_free(cache_matcher);
#ifdef HAVE_MLX5DV_DR
         flow_dv_tbl_resource_release(dev, tbl);
#endif
         return rte_flow_error_set(error, ENOMEM,
                       RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
                       NULL, "cannot create matcher");
     }
-------------------------------
mlx5_glue->dv_create_flow_matcher(...) returns (void *) 0x0.
Because of this, the if-statement is fulfilled and returns the error.

Do you have an idea why the matcher can't be created?

Thanks!
Sebastian

On 03.01.20 11:40, Sebastian Bernauer wrote:


Hello DPDK team,

I have 2 Mellanox ConnectX-4 MCX415A-CCAT cards connected with DAC


(firmware 12.26.4012). Im using debian stretch and DPDK 19.11.


If i try to start DPDK-applications i get the following error:

sbernauer at he37:~$ lspci | grep Mellanox
04:00.0 Ethernet controller: Mellanox Technologies MT27700 Family


[ConnectX-4]


42:00.0 Network controller: Mellanox Technologies MT27500 Family


[ConnectX-3]


sbernauer at he37:~$ sudo dpdk-19.11/examples/l2fwd/build/app/l2fwd -w


04:00.0 -- -p 0x1


EAL: Detected 40 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'PA'
EAL: No available hugepages reported in hugepages-1048576kB
EAL: Probing VFIO support...
EAL: PCI device 0000:04:00.0 on NUMA socket 0
EAL:   probe driver: 15b3:1013 net_mlx5
MAC updating enabled
Notice: odd number of ports in portmask.
Lcore 0: RX port 0
Initializing port 0... EAL: Error - exiting with code: 1
   Cause: rte_eth_dev_start:err=-12, port=0

I can't find a description of the error code -12, can you please give my a hint


whats my problem?


Thanks a lot!
Sebastian