DPDK over OVS hardware - offloaded Bluefield SmartNIC

Infrastructure & Networking BlueField
1

Hello

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I am still working on OVS and DPDK on Bluefield SmartNIC.

(https://community.mellanox.com/s/question/0D51T00006zBdRNSA0/ovs-hw-offload-in-smartnic)

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I tried running DPDK after offloading OVS on SmartNIC hardware.

In my knowledge, I thought I would be able to control packet forwarding by HW-offloaded OVS with the highest priority. However, when I ran DPDK, it ignored offloaded rules, and receive/transmit packet.

Does DPDK completely ignores OVS rules? Or is there any way to run DPDK over OVS?

Thanks.

2

Hi,

Once you added your ovs rules and the offloading is enabled .

ovs-vsctl set Open_vSwitch . other_config:hw-offload=true

(check also the hw-tc-offload via ethtool -k | grep hw-tc-offload)

You will be able to dump the flows that are offloaded

ovs-dpctl dump-flows type=offloaded

Let me know if it answers your question.

Marc

3

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I’ve set hw-offload option of ovs, but it still didn’t work.

Actually, I could not find any rules by ovs-dpctl, while ovs-ofctl showed bridge rule which is currently forwarding packets between the network(p0) and host(pf0hpf).

Is there any special way to make a hw-offloaded rule?

4

Hi @marinearchon159 ,
ovs-dpctl does not really show the information you are looking for. Try using ovs-appctl. If a flow is offloaded to the hardware, you will see a dp flag in the output indicating whether kernel-driver-based offload via tc flowers, or dpdk.

Example I am running now:

ovs-appctl dpctl/dump-flows -m
ufid:f8a3234a-3f74-43ab-9d5d-fe2148d0d4cc, skb_priority(0/0),skb_mark(0/0),
ct_state(0/0),ct_zone(0/0),ct_mark(0/0),ct_label(0/0),recirc_id(0),
dp_hash(0/0),in_port(pf0hpf),packet_type(ns=0/0,id=0/0),
eth(src=00:00:00:00:00:00/00:00:00:00:00:00,dst=00:00:00:00:00:00/00:00:00:00:00:00),
eth_type(0x0800),ipv4(src=10.0.0.1,dst=10.0.0.2,proto=0/0,tos=0/0,ttl=0/0,
frag=no), packets:2075031628, bytes:1054116049076, used:0.220s, 
offloaded:yes, dp:tc, actions:p0