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From: Nandini Rangaswamy <nandini.rangaswamy@broadcom.com>
Date: Fri, 7 Jun 2024 16:31:51 -0700
Message-ID: <CAAkQrK_Rv_1HPZsuOvh2Bj1mptxt-Nex4y=zQV_i2XkLumHhAQ@mail.gmail.com>
Subject: Re: Compiling testpmd with DPDK netvsc PMD
To: David Marchand <david.marchand@redhat.com>
Cc: users@dpdk.org
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Hi David,
Thanks for your email. I inspected meson build output and do see that
netvsc is in the list of enabled drivers.
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Drivers Enabled
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
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=3Dshared from static and it
worked.
Regards,
Nandini
On Fri, Jun 7, 2024 at 3:56=E2=80=AFAM David Marchand <david.marchand@redha=
t.com>
wrote:
> Hello,
>
> On Thu, Jun 6, 2024 at 11:32=E2=80=AFPM Nandini Rangaswamy
> <nandini.rangaswamy@broadcom.com> wrote:
> > I tried compiling the testpmd with DPDK netvsc for openwrt by setting
> CONFIG_RTE_LIBRTE_NETVSC_PMD=3Dy .
> >
> > 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 =3D> /lib/x86_64-linux-gnu/libm.so.6 (0x00007ffb08134=
000)
> > libdl.so.2 =3D> /lib/x86_64-linux-gnu/libdl.so.2
> (0x00007ffb0812f000)
> > libelf.so.1 =3D> /usr/lib/x86_64-linux-gnu/libelf.so.1
> (0x00007ffb08111000)
> > libpcap.so.1 =3D> not found
> > libmlx5.so.1 =3D> /usr/lib/x86_64-linux-gnu/libmlx5.so.1
> (0x00007ffb08093000)
> > libibverbs.so.1 =3D> /usr/lib/x86_64-linux-gnu/libibverbs.so.1
> (0x00007ffb0806d000)
> > libIPSec_MB.so.1 =3D> not found
> > libcrypto.so.3 =3D> /usr/lib/x86_64-linux-gnu/libcrypto.so.3
> (0x00007ffb07c29000)
> > libgcc_s.so.1 =3D> /lib/x86_64-linux-gnu/libgcc_s.so.1
> (0x00007ffb07c09000)
> > libpthread.so.0 =3D> /lib/x86_64-linux-gnu/libpthread.so.0
> (0x00007ffb07c04000)
> > libc.so.6 =3D> /lib/x86_64-linux-gnu/libc.so.6 (0x00007ffb079db=
000)
> > /lib64/ld-linux-x86-64.so.2 (0x00007ffb097c1000)
> > libz.so.1 =3D> /lib/x86_64-linux-gnu/libz.so.1 (0x00007ffb079bd=
000)
> > libnl-route-3.so.200 =3D>
> /usr/lib/x86_64-linux-gnu/libnl-route-3.so.200 (0x00007ffb0793a000)
> > libnl-3.so.200 =3D> /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
>
>
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<div dir=3D"ltr">Hi David,<div>Thanks for your email. I inspected meson bui=
ld output and do see that netvsc is in the list of enabled drivers.</div><d=
iv>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>Drivers Enabled<br>=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br><br>common:<br>=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 iavf, mlx5, qat,<br>bus:<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 auxil=
iary, pci, vdev, vmbus,<br>mempool:<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 bucket, =
ring, stack,<br>dma:<br><br>net:<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 af_packet, =
bond, e1000, ena, failsafe, gve, i40e, iavf,<br></div><div>=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 ice, igc, ixgbe, kni, mlx5, <b>netvsc</b>, ring, tap,<br>=C2=
=A0 =C2=A0 =C2=A0 =C2=A0 vdev_netvsc, vhost, virtio, vmxnet3,<br></div><div=
><br></div><div>Also, i changed the meson.build=C2=A0default_library=3Dshar=
ed from static=C2=A0and it worked.</div><div>Regards,</div><div>Nandini</di=
v></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr=
">On Fri, Jun 7, 2024 at 3:56=E2=80=AFAM David Marchand <<a href=3D"mail=
to:david.marchand@redhat.com" target=3D"_blank">david.marchand@redhat.com</=
a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">He=
llo,<br>
<br>
On Thu, Jun 6, 2024 at 11:32=E2=80=AFPM Nandini Rangaswamy<br>
<<a href=3D"mailto:nandini.rangaswamy@broadcom.com" target=3D"_blank">na=
ndini.rangaswamy@broadcom.com</a>> wrote:<br>
> I tried compiling the testpmd with DPDK netvsc for openwrt by setting =
CONFIG_RTE_LIBRTE_NETVSC_PMD=3Dy .<br>
><br>
> However, when I check ldd testpmd, it does not show any of the dpdk sh=
ared libraries including net_netvsc linked to testpmd binary.<br>
> ldd dpdk-testpmd<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0linux-vdso.so.1 (0x00007ffca1467000)<=
br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libm.so.6 =3D> /lib/x86_64-linux-g=
nu/libm.so.6 (0x00007ffb08134000)<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libdl.so.2 =3D> /lib/x86_64-linux-=
gnu/libdl.so.2 (0x00007ffb0812f000)<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libelf.so.1 =3D> /usr/lib/x86_64-l=
inux-gnu/libelf.so.1 (0x00007ffb08111000)<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libpcap.so.1 =3D> not found<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libmlx5.so.1 =3D> /usr/lib/x86_64-=
linux-gnu/libmlx5.so.1 (0x00007ffb08093000)<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libibverbs.so.1 =3D> /usr/lib/x86_=
64-linux-gnu/libibverbs.so.1 (0x00007ffb0806d000)<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libIPSec_MB.so.1 =3D> not found<br=
>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libcrypto.so.3 =3D> /usr/lib/x86_6=
4-linux-gnu/libcrypto.so.3 (0x00007ffb07c29000)<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libgcc_s.so.1 =3D> /lib/x86_64-lin=
ux-gnu/libgcc_s.so.1 (0x00007ffb07c09000)<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libpthread.so.0 =3D> /lib/x86_64-l=
inux-gnu/libpthread.so.0 (0x00007ffb07c04000)<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libc.so.6 =3D> /lib/x86_64-linux-g=
nu/libc.so.6 (0x00007ffb079db000)<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0/lib64/ld-linux-x86-64.so.2 (0x00007f=
fb097c1000)<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libz.so.1 =3D> /lib/x86_64-linux-g=
nu/libz.so.1 (0x00007ffb079bd000)<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libnl-route-3.so.200 =3D> /usr/lib=
/x86_64-linux-gnu/libnl-route-3.so.200 (0x00007ffb0793a000)<br>
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0libnl-3.so.200 =3D> /lib/x86_64-li=
nux-gnu/libnl-3.so.200 (0x00007ffb07917000)<br>
<br>
I am not sure what openwrt does wrt DPDK compilation, yet I can give some h=
ints.<br>
<br>
DPDK drivers are, by default, statically linked into dpdk binaries<br>
like testpmd, so netvsc would not show up in this listing you tried.<br>
On the other hand, if using dynamically linked drivers, testpmd is not<br>
linked to them. Instead, those shared libraries are found<br>
automatically (for a DPDK global install) or via the -d EAL option.<br>
Then EAL loads those drivers via dlopen().<br>
<br>
If you want to ensure that a specific driver is linked in, you may<br>
inspect meson output (which lists enabled drivers), or have a try with<br>
dpdk-pmd-info.py /path/to/dpdk-testpmd.<br>
<br>
HTH,<br>
<br>
-- <br>
David Marchand<br>
<br>
</blockquote></div>
<br>
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