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From: Adel Belkhiri <adel.belkhiri@gmail.com>
To: users@dpdk.org
Subject: Does the vhost-user driver ensures the distribution of traffic between multiple RX queues?
Date: Thu, 9 Jun 2022 13:37:44 -0400	[thread overview]
Message-ID: <CAMxxxdPRiMc6KUKmaSdrtsoXg5o7=jEYUAup+OfR_LcWob89xA@mail.gmail.com> (raw)
In-Reply-To: <CAMxxxdPe8aZ4=KcuE+Gf4-hJGZ3cNc6j2e4V0vM05-rGB+dzTA@mail.gmail.com>

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Hi guys,

I have a question for you. I know that vhost-user NICs can be configured
with many  RX/TX queues, but does the vhost-user driver ensures the
distribution of traffic between RX queues?

I used the sample application l3fdw to switch traffic between two
vhost-user NICs, each with 4 queues. The traffic was generated using TREX
(and testpmd also), 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.

The l3fdw app tells me that "Port 0 modified RSS hash function based on
hardware support,requested:0xa38c configured:0". For offloading
capabilities, testpmd indicates that the vhost-user nic NIC has only
support for VLAN STRIP (and not for RSS)!

I appreciate any clarification on this matter.

Thank you,

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

Adele

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           reply	other threads:[~2022-06-09 17:37 UTC|newest]

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