[dpdk-users] DPDK on Mellanox BlueField Ref Platform

[Jim Vaigl]

Since no one has chimed in with any build/install/configure suggestion for
the
BlueField, I've spent some time debugging and thought I'd share the results.
Building the l3fwd example application and running it as the docs suggest,
when
I try to send it UDP packets from another machine, it dumps core.

Debugging a bit with gdb and printf, I can see that from inside
process_packet()
and processx4_step1() the calls to rte_pktmbuf_mtod() return Nil or
suspicious
pointer values (i.e. 0x80).  The sample apps don't guard against NULL
pointers
being returned from this rte call, so that's why it's dumping core.

I still think the problem is related to the driver config, but thought this
might ring a bell for anyone who's had problems like this.

The thing that still bothers me is that rather than seeing what I was
expecting
at init based on what the documentation shows:
    [...]
    EAL: probe driver: 15b3:1013 librte_pmd_mlx5

... when rte_eal_init() runs, I'm seeing:
    [...]
    EAL:  Selected IOVA mode 'PA'
    EAL:  Probing VFIO support...

This still seems wrong, and I've verified that specifying the BlueField
target ID
string in the make is causing "CONFIG_RTE_LIBRTE_MLX5_PMD=y" to appear in
the .config.

Regards,
--Jim Vaigl
614 886 5999