High CPU load with USB-ethernet adapter

Indigo

Member
Dec 14, 2020
5
1
23
35
I have an NUC10 in which i am running OpenWRT 21 as my router.
I have add an USB-to-Ethernet port (where i PPPoE passthrou from ISP router to the NUC) and the NUC's LAN port is connected to my switch.

The problem occur when i am downloading anything with speed of 2-3 MB/s the CPU temp is increasing a lot and the fan working at maximum RPM.
When i am transferring files and the NUC's LAN port is at his maximum load (1 Gbit) i don't have this kind of problem.

My question why this happening at such low bandwidth (2-3 MB/s) and only with the USB-to-Ethernet stick?
I happen to have TP-LINK UE300 and TP-LINK UE300C but the problem was the same.

Here my settings

1682355473416.png

1682355485753.png


and here the status of CPU when i am not downloading anything

1682356534434.png

1682355550564.png

and here when i am downloading something from the net at 3.5 MB/s

1682355655720.png
1682355679120.png


In the beginning i configure the USB-to-Ethernet port via Network option to one Linux Bridge and then this Linux Bridge to the OpenWRT VM but i still i had this problem, then i though if i passthrou direct to the VM the USB-to-Ethernet stick it will be solved but unfortunately nothing changed.
 
Last edited:

About

The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!