[REQUEST] Convert the single threads operation in Virtual Switch to DPDK approach

[Irene-123]

Hi there,

I have went through the contribution guide and have a request to introduce DPDK or Linux Packet Buffer approach

Summary: The code in vslib/HostInterfaceInfo.cpp utilises read & write operations. This code essentially creates a separate thread for each switch port and does read() and write() of one packet at a time to copy packets from the virtual linux network interfaces and the virtual switch port TAP devices. This is very slow and adds a lot of latency.

Requirement/Reason: Low latency as read() write() operations create single new threads

Approach: Can I try to see if Linux Packet Buffer could be a more optimized approach or even DPDK (which is my target, as it's the fastest)?

I'm also new to the SONiC software & community around, would appreciate if I could get some direction or help :)
Also, apologies if any of my point above is incorrect, I have tried to frame the issue with the best of my knowledge

Thank you

[kcudnik]

hey, i wrote that code, and this was by design, that traffic on port was intended only for control traffic, not actual dataplane transfer, but if you want to improve that you are very wellcome :)

[Irene-123]

Sure, thank you, will keep the progress posted here