[dpdk-users] Failed to bring-up DPDK ports on Azure VM

[Stephen Hemminger]

On Sun, 18 Apr 2021 17:51:09 +0530
madhukar mythri <madhukar.mythri at gmail.com> wrote:

> Hi,
> 
> When we tried to launch a DPDK app on Azure VM with 2-queues,
> seeing following errors and thus we are not able to receive any traffic
> on these NIC ports(MLX5).
> On Azure VM, using "net_failsafe" PMD.
> 
> =======================
> PORT 0 Max supports 16 rx queues and 16 tx queues (driver_name =
> net_failsafe, driver_type = 16)
> PORT 0 is polling for link-change, interrupts disabled
>  *rss_add_actions(): Failed to load BPF section l3_l4 (11): Resource
> temporarily unavailable*
>  net_failsafe: Failed to create flow on sub_device 1
>  add_flow(): create() fails for port 0; Reason: action not supported
> ===================
> 
> This issue is seen with 2-queues only, whereas with 4-queues we are not
> seeing this issue.
> 
> Does anybody faced similar issue and if any solution/work-around please let
> me know.
> 
> DPDK version: 20.11
> With RHEL: 7.9 version.
> 
> Thanks,
> Madhukar.


If you are using failsafe, make sure that you have the Mellanox drivers enabled
in your DPDK build, also TAP device. You need to build with rdma-core version 23 or
later, and you need to have the kernel modules for flower, multiq, and TAP.

Turn on full DPDK logging and check the kernel log (dmesg).