Re: Troubleshooting DPDK in Intel Ethernet NIC

["Antón Rey Villaverde" <anton.rey@cactussoft.biz>]

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Hi, thanks for the quick response and the feedback.

*> Afaics, this nic is not supported by DPDK drivers.*

Indeed there is nothing about "15fb" (the PCI ID of my NIC) in the output
of ./usertools/dpdk-pmdinfo.py build/app/dpdk-testpmd , so I guess it is
not supported.

On the other hand, I do see that the* I219* family of my NIC (I219-LM) is
present in the list https://core.dpdk.org/supported/nics/intel/ under
e1000e category.

Is this a contradiction or am I missing something?

Regards

On Fri, Sep 8, 2023 at 9:11 AM David Marchand <david.marchand@redhat.com>
wrote:

> Hello,
>
> On Fri, Sep 8, 2023 at 8:42 AM Antón Rey Villaverde
> <anton.rey@cactussoft.biz> wrote:
> >
> > Hi,
> > I have a problem while trying to manage my physical Ethernet interface
> from DPDK (latest version compiled from source).
> > I have a:
> > NIC: 0000:00:1f.6 Ethernet controller: Intel Corporation Ethernet
> Connection (13) I219-LM (rev 20)
> >
> > which belongs to the list of supported NICs in DPDK.
> >
> > Also, I have bound my NICto vfio-pci, not the kernel:
> >
> > dpdk-23.07$ usertools/dpdk-devbind.py --status
> > Network devices using DPDK-compatible driver
> ============================================ 0000:00:1f.6 'Ethernet
> Connection (13) I219-LM 15fb' drv=vfio-pci unused=e1000e
> >
> > I also enabled hugepages (2G).
> >
> > when I enter "sudo build/app/dpdk-testpmd -c7 -- -i" I get:
> > EAL: Detected CPU lcores: 8
> > EAL: Detected NUMA nodes: 1
> > EAL: Detected static linkage of DPDK
> > EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
> > EAL: Selected IOVA mode 'VA'
> > EAL: VFIO support initialized
> > TELEMETRY: No legacy callbacks, legacy socket not created
> > testpmd: No probed ethernet devices
> > Interactive-mode selected
> > testpmd: create a new mbuf pool <mb_pool_0>: n=163456, size=2176,
> socket=0
> > testpmd: preferred mempool ops selected: ring_mp_mc
> > Done
> > testpmd>
> >
> > When I enter "show port info all" in the testpmd CLI I get nothing (no
> ports).
> >
> > When I start testpmd with "-a 0000:00:1f.6" (the address of the ethernet
> NIC I want to manage from DPDK), The same happens (no ports).
>
> Afaics, this nic is not supported by DPDK drivers.
> You will have to find some other nic, or run on another server with
> supported nics.
> Some details below.
>
>
> For a statically linked DPDK application (which is the default for
> testpmd), you can check with dpdk-pmd-info.py which PCI devices are
> supported.
> Example:
> $ ./usertools/dpdk-pmdinfo.py build/app/dpdk-testpmd | grep -i 15fb
>
>
> >
> > If I try to start testpmd with "-d build/drivers/librte_net_e1000.so"
> (the shared library of the driver of that device), I get a crash:
> >
> > dpdk-23.07$ sudo build/app/dpdk-testpmd -c7 -a 0000:00:1f.6 -d
> build/drivers/librte_net_e1000.so -- -i
> > EAL: Detected CPU lcores: 8
> > EAL: Detected NUMA nodes: 1
> > EAL: Detected static linkage of DPDK
>
> Your testpmd binary has been statically linked (as I said above, this
> is the default) and you can see the log message confirming it.
>
>
> > EAL: UIO_RESOURCE_LIST tailq is already registered PANIC in
> tailqinitfn_rte_uio_tailq(): Cannot initialize tailq: UIO_RESOURCE_LIST
> > 0: build/app/dpdk-testpmd (rte_dump_stack+0x32) [55be1839afe2]
> > 1: build/app/dpdk-testpmd (__rte_panic+0xf1) [55be18369e68]
> > 2: /home/anton/tdr/dpdk-23.07/build/drivers/librte_bus_pci.so.23
> (7f52153f6000+0x5d86) [7f52153fbd86]
> > 3: /lib64/ld-linux-x86-64.so.2 (7f5215f90000+0x11b9a) [7f5215fa1b9a]
> > 4: /lib64/ld-linux-x86-64.so.2 (7f5215f90000+0x11ca1) [7f5215fa1ca1]
> > 5: /lib/x86_64-linux-gnu/libc.so.6 (_dl_catch_exception+0xe5)
> [7f5215970985]
> > 6: /lib64/ld-linux-x86-64.so.2 (7f5215f90000+0x160cf) [7f5215fa60cf]
> > 7: /lib/x86_64-linux-gnu/libc.so.6 (_dl_catch_exception+0x88)
> [7f5215970928]
> > 8: /lib64/ld-linux-x86-64.so.2 (7f5215f90000+0x1560a) [7f5215fa560a]
> > 9: /lib/x86_64-linux-gnu/libdl.so.2 (7f5215e15000+0x134c) [7f5215e1634c]
> > 10: /lib/x86_64-linux-gnu/libc.so.6 (_dl_catch_exception+0x88)
> [7f5215970928]
> > 11: /lib/x86_64-linux-gnu/libc.so.6 (_dl_catch_error+0x33) [7f52159709f3]
> > 12: /lib/x86_64-linux-gnu/libdl.so.2 (7f5215e15000+0x1b59) [7f5215e16b59]
> > 13: /lib/x86_64-linux-gnu/libdl.so.2 (dlopen+0x4a) [7f5215e163da]
> > 14: build/app/dpdk-testpmd (55be17b79000+0x8013ee) [55be1837a3ee]
> > 15: build/app/dpdk-testpmd (eal_plugins_init+0x14f) [55be1837a6d8]
> > 16: build/app/dpdk-testpmd (rte_eal_init+0x1af) [55be1839ec21]
> > 17: build/app/dpdk-testpmd (main+0xde) [55be17da108b]
> > 18: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf3)
> [7f5215834083]
> > 19: build/app/dpdk-testpmd (_start+0x2e) [55be17cef1fe]
> > Aborted
>
> This is not a crash, EAL willingly aborts because initialising UIO
> shared tailq has been requested twice and this is not something
> supported.
> This happened as you requested to load a driver that is embedded in
> the testpmd binary and has already been initialised.
>
>
> --
> David Marchand
>
>

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