[dpdk-users] Running Pktgen with Mellanox CX5

[Narcisa Ana Maria Vasile]

Thanks for the quick reply! Just to clarify, the libmlx4 doesn't get installed when installing the latest Mellanox drivers.
Instead, the libmlx5 is installed, which I believe is the right one to use with Cx5s.

It looks like pktgen needs libmlx4 to run, so does this mean that it is only working with older Mellanox tools and NICs?
I could try install the libmlx4, but my understanding was that libmlx4 is for Cx3s and libmlx5 is for Cx4s and Cx5s.

-----Original Message-----
From: Wiles, Keith <keith.wiles at intel.com> 
Sent: Thursday, April 8, 2021 2:12 PM
To: Narcisa Ana Maria Vasile <Narcisa.Vasile at microsoft.com>
Cc: users at dpdk.org; Kevin Daniel (WIPRO LIMITED) <v-kevdan at microsoft.com>; Omar Cardona <ocardona at microsoft.com>
Subject: [EXTERNAL] Re: Running Pktgen with Mellanox CX5



> On Apr 8, 2021, at 1:47 PM, Narcisa Ana Maria Vasile <Narcisa.Vasile at microsoft.com> wrote:
> 
> Hi,
>  
> I’m trying to run pktgen (latest ‘master’ branch) with a Mellanox CX5 NIC on Ubuntu 20.04.
> I’ve installed the latest Mellanox drivers (MLNX_OFED_LINUX-5.3-1.0.0.1-ubuntu20.04-x86_64.iso).
> I’ve compiled and installed DPDK successfully (latest ‘main’ branch).
>  
> As you can see below, I’m getting an error message saying “libmlx4.so.1: cannot open shared object file: No such file or directory”.
> I am able to run other DPDK applications such as ‘testpmd’.
>  
> Is pktgen supported with the latest Mellanox drivers on CX5? Thank you!
>  
> --------------
> pktgen -l 1,3,5 -a 04:00.0 -d librte_net_mlx5.so -- -P -m "[3:5].0" -T
>  
> Copyright(c) <2010-2021>, Intel Corporation. All rights reserved. Powered by DPDK
> EAL: Detected 20 lcore(s)
> EAL: Detected 2 NUMA nodes
> EAL: Detected shared linkage of DPDK
> EAL: libmlx4.so.1: cannot open shared object file: No such file or directory
> EAL: FATAL: Cannot init plugins
> EAL: Cannot init plugins

I have not built anything with mlx in a long time. My guess is the libmix4.so.1 is not located in a place the system can pick up. Maybe you need to set LD_LIBRARY_PATH to the path where this library is located. I see you included the DPDK PMD, but you still need to tell applications where to locate the library. Another option is to add it to the /etc/ld.so.conf.d/ file or use pkg-config to locate the libs may help too. In some cases external packages do not store the libs in a standard place for ldconfig to locate or the package does not provide ldconfig configuration files.
>  
> Thank you,
> Narcisa V.