EDIT : The tutorial that I followed to test SoftNIC (
https://doc.dpdk.org/guides-19.02/nics/softnic.html) is appropriate for
DPDK 19.02 but not for the newer versions like 19.11.12, the one I use.
We found out something :

" sudo ./dpdk-testpmd --vdev
'net_softnic0,firmware=./firmware.cli,cpu_id=0,conn_port=8086,sc=0' -- -i
--portmask=0x2".  We didn't really understand the impact of "sc=0" by the
way.
First line of firmware.cli file : "link LINK0 dev net_softnic0" instead of
"link LINK0 dev 0000:19:00.0".
Then, we switched the forwarding mode to Input/Output with the CLI. With
all of that, it looked like it worked. We didn't have any error messages
like before.

If someone is comfortable with test pmd / softnic versions, help should be
quite welcome.

Then, can anyone help us on the pipeline we wanna design (first e-mail) ?

Regards,

Max.




Le mar. 3 mai 2022 à 11:33, Maxime Ramiara <max1mo.ram8@gmail.com> a écrit :

> Hi all,
>
> I'm a beginner with dpdk. With my team, we developed a dpdk app with the
> following pipeline:
>
> NIC RX -> RX Thread -> Worker Thread -> TX Thread -> NIC TX.
>
> Within the RX Thread, we parse some headers. Within the worker thread,
> we're using the hierarchical scheduler. To sum up, we want to replace the
> HS with the traffic manager.
> However, it seems the TM can only be set up on a NIC. This is not what we
> want because we're doing some packet processing stuff within the TX Thread.
>
>
> Thus, we thought about the SoftNIC as a solution for our problem. Would it
> be possible to develop a pipeline like this ?
>
> NIC RX -> RX Thread -> SoftNIC with TM -> Worker Thread -> TX Thread ->
> NIC TX.
>
> It looks like the "firmware.cli" script and the packet framework offer us
> some freedom to make our pipeline.
> First and foremost, I tried to test the SoftNIC with the following command
> in the doc :
>
> ./testpmd -c 0x3 --vdev 'net_softnic0,firmware=<script
> path>/firmware.cli,cpu_id=0,conn_port=8086' -- -i
>      --forward-mode=softnic --portmask=0x2
>
> Below are my network devices with the command log:
>
> ./usertools/dpdk-devbind.py --status
>
> Network devices using DPDK-compatible driver
> ============================================
> 0000:19:00.0 'Ethernet Controller X710 for 10GbE SFP+ 1572' drv=vfio-pci
> unused=i40e
> 0000:19:00.1 'Ethernet Controller X710 for 10GbE SFP+ 1572' drv=vfio-pci
> unused=i40e
>
> Network devices using kernel driver
> ===================================
> 0000:01:00.0 'I350 Gigabit Network Connection 1521' if=eno3 drv=igb
> unused=vfio-pci *Active*
>
> Other Network devices
> =====================
> 0000:01:00.1 'I350 Gigabit Network Connection 1521' unused=igb,vfio-pci
>
> Then, the command log of test-pmd:
>
> sudo ./dpdk-testpmd --vdev
> 'net_softnic0,firmware=./firmware.cli,cpu_id=0,conn_port=8087' -- -i
> --forward-mode=softnic --portmask=0x2
> [sudo] password for user:
> EAL: Detected CPU lcores: 32
> EAL: Detected NUMA nodes: 2
> EAL: Detected static linkage of DPDK
> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
> EAL: Selected IOVA mode 'PA'
> EAL: VFIO support initialized
> EAL: Using IOMMU type 8 (No-IOMMU)
> EAL: Probe PCI driver: net_i40e (8086:1572) device: 0000:19:00.0 (socket 0)
> EAL: Probe PCI driver: net_i40e (8086:1572) device: 0000:19:00.1 (socket 0)
> TELEMETRY: No legacy callbacks, legacy socket not created
> Interactive-mode selected
> Invalid softnic packet forwarding mode
> previous number of forwarding ports 3 - changed to number of configured
> ports 1
> testpmd: create a new mbuf pool <mb_pool_0>: n=395456, size=2176, socket=0
> testpmd: preferred mempool ops selected: ring_mp_mc
> testpmd: create a new mbuf pool <mb_pool_1>: n=395456, size=2176, socket=1
> testpmd: preferred mempool ops selected: ring_mp_mc
>
> Warning! port-topology=paired and odd forward ports number, the last port
> will pair with itself.
>
> Configuring Port 0 (socket 0)
> Port 0: E4:43:4B:04:D1:4E
> Configuring Port 1 (socket 0)
> Port 1: E4:43:4B:04:D1:50
> Configuring Port 2 (socket 0)
> ; SPDX-License-Identifier: BSD-3-Clause
> ; Copyright(c) 2018 Intel Corporation
>
> link LINK0 dev 0000:19:00.0
>
> pipeline RX period 10 offset_port_id 0
> pipeline RX port in bsz 32 link LINK0 rxq 0
> pipeline RX port out bsz 32 swq RXQ0
> pipeline RX table match stub
> pipeline RX port in 0 table 0
> pipeline RX table 0 rule add match default action fwd port 0
>
> pipeline TX period 10 offset_port_id 0
> pipeline TX port in bsz 32 swq TXQ0
> pipeline TX port out bsz 32 link LINK0 txq 0
> pipeline TX table match stub
> pipeline TX port in 0 table 0
> pipeline TX table 0 rule add match default action fwd port 0
>
> thread 1 pipeline RX enable
> Command "thread pipeline enable" failed.
> thread 1 pipeline TX enable
> Command "thread pipeline enable" failed.
> Port 2: 00:00:00:00:00:00
> Checking link statuses...
> Done
> testpmd>
> Port 0: link state change event
>
> Port 1: link state change event
>
>
> Can anyone please help us on this ?
>
> Regards,
>
> Max.
>