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From: Adel Belkhiri <adel.belkhiri@gmail.com>
Date: Tue, 7 Jun 2022 19:28:36 -0400
Message-ID: <CAMxxxdN++CFz9YEPKmcYq_AbsnAyyqLRfwE+1AwnzYjEqcqF7g@mail.gmail.com>
Subject: Problem configuring vhost-user NICs with multi queues (RSS) support
To: users@dpdk.org
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--0000000000004d91a705e0e3f350
Content-Type: text/plain; charset="UTF-8"

Hi all,

I have a problem with the configuration of the sample application l3fdw for
switching traffic between two vhost-user NICs, each with 4 queues. The
traffic was generated using TREX, running inside a VM.

When I traced my experiment, I noticed that the traffic was only received
in queue "0", while the other RX queues were empty. When I run the
application, a msg is printed "Port 1 modified RSS hash function based on
hardware support,requested:0xa38c configured:0".

It seems that while the vhost-user NIC implementation supports multiple
queues, it does not support distributing the traffic between the RX queues.

I wonder if there is a way to make it work?

Thank you,

PS:
- DPDK version: 19.08
- Qemu version: 4.2.1

Adele

--0000000000004d91a705e0e3f350
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><span style=3D"color:rgb(0,0,0)">Hi all,</span><div style=
=3D"color:rgb(0,0,0)"><br></div><div style=3D"color:rgb(0,0,0)">I have a pr=
oblem with the configuration of the sample application l3fdw for switching =
traffic between two vhost-user NICs, each with 4 queues. The traffic=C2=A0w=
as generated using TREX, running inside a VM.=C2=A0</div><div style=3D"colo=
r:rgb(0,0,0)"><br></div><div style=3D"color:rgb(0,0,0)">When=C2=A0I traced =
my experiment, I noticed that the traffic was only received in queue &quot;=
0&quot;, while the other RX queues were empty. When I run the application, =
a msg is printed &quot;Port 1 modified RSS hash function based on hardware =
support,requested:0xa38c configured:0&quot;.=C2=A0</div><div style=3D"color=
:rgb(0,0,0)"><br></div><div style=3D"color:rgb(0,0,0)">It seems that while =
the vhost-user NIC implementation supports multiple queues, it does not sup=
port distributing the traffic between the RX queues.=C2=A0</div><div style=
=3D"color:rgb(0,0,0)"><br></div><div style=3D"color:rgb(0,0,0)">I wonder if=
 there is a way to make it work?</div><div style=3D"color:rgb(0,0,0)"><br><=
/div><div style=3D"color:rgb(0,0,0)">Thank you,<br></div><div style=3D"colo=
r:rgb(0,0,0)"><br></div><div style=3D"color:rgb(0,0,0)">PS:=C2=A0=C2=A0</di=
v><div style=3D"color:rgb(0,0,0)">- DPDK version: 19.08</div><div style=3D"=
color:rgb(0,0,0)">- Qemu version:=C2=A04.2.1</div><div style=3D"color:rgb(0=
,0,0)"><br></div><div style=3D"color:rgb(0,0,0)">Adele</div></div>

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