[dpdk-dev] Cannot use MLX4 with igb_uio driver

[Royce Niu]

It is a simple L2FWD. It can be 14mpps in x520 nics. So, do you think where
should I check? Thanks


On Tue, 10 Jan 2017 at 12:13 AM, Adrien Mazarguil <
adrien.mazarguil at 6wind.com> wrote:

> On Mon, Jan 09, 2017 at 11:23:56PM +0800, Royce Niu wrote:
>
> > Hi, Adrien,
>
> >
>
> > Actually, I tested using the original kernel module without binding. It
>
> > works.
>
> >
>
> > However, it is only 6Mpps for 64B in pkt-gen, which is so slow for a
> 40Gbps
>
> > NIC.
>
> >
>
> > Is that right?
>
>
>
> That's difficult to say without knowing your specific setup or application,
>
> however 6 Mpps seems abnormally slow assuming testpmd performing basic I/O
>
> forwarding using a single thread and two ports.
>
>
>
> > On Mon, Jan 9, 2017 at 11:13 PM, Adrien Mazarguil <
>
> > adrien.mazarguil at 6wind.com> wrote:
>
> >
>
> > > Hi Royce,
>
> > >
>
> > > On Mon, Jan 09, 2017 at 10:53:37PM +0800, Royce Niu wrote:
>
> > > > Dear all,
>
> > > >
>
> > > > I cannot use my Mellanox 3 Pro, after I binded it with igb_uio
> driver.
>
> > > >
>
> > > > It always shows when I use my DPDK application.
>
> > > >
>
> > > > EAL: Detected 32 lcore(s)
>
> > > > EAL: Probing VFIO support...
>
> > > > PMD: bnxt_rte_pmd_init() called for (null)
>
> > > > EAL: PCI device 0000:02:00.0 on NUMA socket 0
>
> > > > EAL:   probe driver: 8086:1521 rte_igb_pmd
>
> > > > EAL: PCI device 0000:02:00.1 on NUMA socket 0
>
> > > > EAL:   probe driver: 8086:1521 rte_igb_pmd
>
> > > > EAL: PCI device 0000:02:00.2 on NUMA socket 0
>
> > > > EAL:   probe driver: 8086:1521 rte_igb_pmd
>
> > > > EAL: PCI device 0000:02:00.3 on NUMA socket 0
>
> > > > EAL:   probe driver: 8086:1521 rte_igb_pmd
>
> > > > EAL: PCI device 0000:81:00.0 on NUMA socket 1
>
> > > > EAL:   probe driver: 15b3:1007 librte_pmd_mlx4
>
> > > > PMD: librte_pmd_mlx4: cannot access device, is mlx4_ib loaded?
>
> > > > EAL: Error - exiting with code: 1
>
> > > >   Cause: Cannot create mbuf pool
>
> > > >
>
> > > > ---------------
>
> > > > I have added CONFIG_RTE_LIBRTE_MLX4_PMD=y in .config, and
>
> > > > install MLNX_OFED_LINUX-3.4-2.0.0.0.
>
> > >
>
> > > The mlx4 PMD does not operate through igb_uio (see mlx4 documentation
> [1]),
>
> > > PCI devices must remain bound to their original kernel module
> (mlx4_core),
>
> > > however you have to additionally load mlx4_ib, mlx4_en and ib_uverbs
> [2].
>
> > >
>
> > > [1] http://dpdk.org/doc/guides/nics/mlx4.html
>
> > > [2] http://dpdk.org/doc/guides/nics/mlx4.html#prerequisites
>
> > >
>
> > > --
>
> > > Adrien Mazarguil
>
> > > 6WIND
>
> > >
>
> >
>
> >
>
> >
>
> > --
>
> > Regards,
>
> >
>
> > Royce
>
>
>
> --
>
> Adrien Mazarguil
>
> 6WIND
>
>