Compiling testpmd with DPDK netvsc PMD

[Nandini Rangaswamy]

Hi David,
Thanks for your email. I inspected meson build output and do see that
netvsc is in the list of enabled drivers.
===============
Drivers Enabled
===============

common:
        iavf, mlx5, qat,
bus:
        auxiliary, pci, vdev, vmbus,
mempool:
        bucket, ring, stack,
dma:

net:
        af_packet, bond, e1000, ena, failsafe, gve, i40e, iavf,
        ice, igc, ixgbe, kni, mlx5, *netvsc*, ring, tap,
        vdev_netvsc, vhost, virtio, vmxnet3,

Also, i changed the meson.build default_library=shared from static and it
worked.
Regards,
Nandini

On Fri, Jun 7, 2024 at 3:56 AM David Marchand <david.marchand at redhat.com>
wrote:

> Hello,
>
> On Thu, Jun 6, 2024 at 11:32 PM Nandini Rangaswamy
> <nandini.rangaswamy at broadcom.com> wrote:
> > I tried compiling the testpmd with DPDK netvsc for openwrt by setting
> CONFIG_RTE_LIBRTE_NETVSC_PMD=y .
> >
> > However, when I check ldd testpmd, it does not show any of the dpdk
> shared libraries including net_netvsc linked to testpmd binary.
> > ldd dpdk-testpmd
> >         linux-vdso.so.1 (0x00007ffca1467000)
> >         libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007ffb08134000)
> >         libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2
> (0x00007ffb0812f000)
> >         libelf.so.1 => /usr/lib/x86_64-linux-gnu/libelf.so.1
> (0x00007ffb08111000)
> >         libpcap.so.1 => not found
> >         libmlx5.so.1 => /usr/lib/x86_64-linux-gnu/libmlx5.so.1
> (0x00007ffb08093000)
> >         libibverbs.so.1 => /usr/lib/x86_64-linux-gnu/libibverbs.so.1
> (0x00007ffb0806d000)
> >         libIPSec_MB.so.1 => not found
> >         libcrypto.so.3 => /usr/lib/x86_64-linux-gnu/libcrypto.so.3
> (0x00007ffb07c29000)
> >         libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1
> (0x00007ffb07c09000)
> >         libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0
> (0x00007ffb07c04000)
> >         libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007ffb079db000)
> >         /lib64/ld-linux-x86-64.so.2 (0x00007ffb097c1000)
> >         libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007ffb079bd000)
> >         libnl-route-3.so.200 =>
> /usr/lib/x86_64-linux-gnu/libnl-route-3.so.200 (0x00007ffb0793a000)
> >         libnl-3.so.200 => /lib/x86_64-linux-gnu/libnl-3.so.200
> (0x00007ffb07917000)
>
> I am not sure what openwrt does wrt DPDK compilation, yet I can give some
> hints.
>
> DPDK drivers are, by default, statically linked into dpdk binaries
> like testpmd, so netvsc would not show up in this listing you tried.
> On the other hand, if using dynamically linked drivers, testpmd is not
> linked to them. Instead, those shared libraries are found
> automatically (for a DPDK global install) or via the -d EAL option.
> Then EAL loads those drivers via dlopen().
>
> If you want to ensure that a specific driver is linked in, you may
> inspect meson output (which lists enabled drivers), or have a try with
> dpdk-pmd-info.py /path/to/dpdk-testpmd.
>
> HTH,
>
> --
> David Marchand
>
>

-- 
This electronic communication and the information and any files transmitted 
with it, or attached to it, are confidential and are intended solely for 
the use of the individual or entity to whom it is addressed and may contain 
information that is confidential, legally privileged, protected by privacy 
laws, or otherwise restricted from disclosure to anyone else. If you are 
not the intended recipient or the person responsible for delivering the 
e-mail to the intended recipient, you are hereby notified that any use, 
copying, distributing, dissemination, forwarding, printing, or copying of 
this e-mail is strictly prohibited. If you received this e-mail in error, 
please return the e-mail to the sender, delete it from your computer, and 
destroy any printed copy of it.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mails.dpdk.org/archives/users/attachments/20240607/342e6f80/attachment.htm>