Hardware offloaded QoS

Installing and Using OpenWrt
1

Hi,

New here. Thank you for building openwrt!

I have been trying to understand QoS and Hardware offloading, one of my question is that whether MT7988 able to support hardware offloaded QoS.

  1. I found in many documentations within openwrt, like thisstating

(hardware flow offloading is) Incompatible with features like Smart Queue Management (SQM) or QoS

  1. However, the datasheet states that there is a QoS DMA controller.

  2. Also, this post claims hardware QoS works on BPI-R4 in “openwrt master branch”

How should I understand the current status of how openwrt supports QoS hardware offloading on different hardware?

Thanks in advance!

2

Mediatek has HW QoS for quite a long time but I have failed to enable it: Hardware QoS support status - #8 by timur.davletshin

... IMHO it is not fully implemented.

PS: https://netdevconf.info/0x14/pub/papers/48/0x14-paper48-talk-paper.pdf - some theoretic background.

3

I would recommend you testing it out on your own hardware. Who knows, maybe things have changed since I tried it...

4

Thank you for the explanation! Do you recommend following your post here to test?

5

Yep, but don't forget to make sure that QoS offloading is enabled via ethtool (see same thread, few posts earlier).