Virtio just 1gb instead of 10gb

[unraider]

hello, I run OPNsense as a VM using Unraid as Host.

All Interfaces als virualized using VIRTIO (also tested VIRTIO-NET and E1000).
In Web-UI they are shown as "10Gbase-T <full-duplex>".

When copying files (and testing with iperf3) I only get 1 gbit speed (iperf3 shows 850 Mbits/sec).

Other VMs on the same Host (ubuntu, freebsd13) are running successfully with 10gbit speed (iperf3 shows 18 Gbits/sec).

Settings in OPNsense: CRC, TSO, LRO are deactivated.
Tested on fresh install withoud Shaper.

My Network runs at 10gb and 2.5gbit and 1gbit - and OPNsense is the only limiting element.

Please give some hints what I could try to get full speed.

[Grossartig]

You could try the speedtest plugin from this repository to measure your outgoing speed directly from OPNsense to give you another data point: https://www.routerperformance.net/opnsense-repo/

[unraider]

I don't need another method to test network speed.

I need a method to improve speed to a level all other VMs (Ubuntu, FreeBSD13) reach "out of the box", and OPNsense does not.

[5SpeedFun]

What speed is your cpu on the host? 

I greatly increased my throughput by passing the pci device directly to opnsense to work with.  Speed improved tremendously.  Is this an option for you?

[unraider]

you are right, CPU Speed does matter.
I've tested following:

My Unraid Server (HOST System) runs on an older XEON 4-Core at 3,3Ghz (Xeon® CPU E3-1230 V2)
with following results testing VM-to-Host-Networkspeed via iperf3:
OPNSense only 850mbit/s
Other VMs on the same Host (ubuntu, freebsd13) 18 Gbits/sec

Other VMs on a newer Test-System (Ryzen7-5750G): 25GBits/sec

=> so CPU speed is not the reason for such poor values on OPNSense (hmm.. maybe OPNSense implements some kind of huge overhead, so it's so much slower than other Operating Systems???)

=> passing through PCIe devices is not an option for me, because I use Brigdes on Host for other VMs and Dockers.

[Patrick M. Hausen]

Since OPNsense 22.1 is FreeBSD 13 I would first use ifconfig to compare the interface settings of a generic FreeBSD VM that - as you wrote - performs well and the OPNsense VM.