On 14/08/2023 11:38, Patrick M. Hausen wrote:
[..]
I never had this solved. Even my FreeBSD guest on FreeBSD host with VirtualBox
is slow as few hunderds kB/s
It was like 10Mbps with Bhyve. I only use VMs for testing but installing
packages is always so slow. So you are not alone. I would really like to know
how to improve the network speed with virtualized environment.
This looks weird to me. I run lots of VMs in production on TrueNAS CORE
- essentially FreeBSD 13-STABLE with bhyve and all of them get near gigabit
speed with bridged networking.
Guests:
Windows
Ubuntu
FreeBSD (OPNsense)
Specifically the OPNsense VM can route 700-800 Mbit/s across gigabit interfaces.
All my VMs use VirtIO network drivers - do yours?
NICs are emulated Intel PRO/1000 MT but I tested VirtIO in the past and
it was the same.
Now I tried to disable RXCSUM and TXCSUM on host interface and it fixed
it. It is strange to me because I never had speed problem on the host it
self so I do not suspect anything wrong on host's interface.
1) speedtest in VM with RXCSUM & TXCSUM enabled
Hosted by Rohwerder Datasystems GmbH (Schwarzenbek) [463.71 km]: 42.018 ms
Testing download speed
Download: 7.37 Mbit/s
Testing upload speed
Upload: 25.16 Mbit/s
2) speedtest in VM right after I disabled RXCSUM & TXCSUM on the host
Hosted by Rohwerder Datasystems GmbH (Schwarzenbek) [463.71 km]: 23.841 ms
Testing download speed
Download: 242.99 Mbit/s
Testing upload speed
Upload: 24.80 Mbit/s
250 Mbit/s is a full speed of my home internet connection.
I don't know why but RXCSUM and TXCSUM cause more problems in my
experiences. I remember I must disabled RXCSUM & TXCSUM in completely
virtual environment of some cloud provider (based on KVM & Qemu) where
we run about 10 machines and one of them should act like an Ipsec
gateway fore a couple of private VMs. Packets were not forwarded between
2 NICs until i disabled RX & TX csums on private VirtIO NIC - all VMs
were FreeBSD 12.3 at that time.
Thank you!
Best regards
Miroslav Lachman
