Bhyve: virtio-net very slow with FreeBSD 12.0 Host

[Ole]

Hello,


I want to push this up again. Cause I ran into it again :-(

I wonder why no one else has a similar problem. I think my setup is
very common.

I made some tcpdumps during (very slow) package installation inside
the VM. 

tcpdump -i igb0 | grep pkg
tcpdump -i igb0.4030 | grep pkg
tcpdump -i bridge0 | grep pkg
tcpdump -i tap0 | grep pkg

the very long output is here https://pastebin.com/vM1VFziJ . For me it
looks like very normal TCP traffic. seqs and acks ...

thanks
Ole

Tue, 5 Feb 2019 15:05:22 +0100 - Ole <ole at free.de>:

> Hello,
> 
> I discovered that virtio-net very slow with FreeBSD 12.0 Host. And
> with very slow I mean 16 kBit/s.
> 
> I can't exclude that there is a problem in my setup. But I created two
> very similar setups. One with FreeBSD 11.2 and one with 12.0. The
> server with 11.2 has no problem.
> 
> Either I do something really wrong or there is a Bug in the
> virtio-net.
> 
> 
> Both Servers are connected to a switch, the IPs of the VMs are in the
> vlan 4030. The Bhyve VMs are mangaed by vm-bhyve (master from
> github). 
> 
> Bridges are created by rc.conf:
> 
>   # Vlans
>   vlans_em0="030"
>   ifconfig_em0_4030="mtu 1400 up"
> 
>   # Bridges
>   cloned_interfaces="bridge0"
>   ifconfig_bridge0="addm em0.4030 mtu 1400 up"
> 
> switch definition:
> 
>   switch_list="vm-net"
>   type_vm-net="manual"
>   bridge_vm-net="bridge0"
> 
> VM config:
> 
>   loader="bhyveload"
>   cpu=7
>   memory=40G
>   network0_type="virtio-net"
>   network0_switch="vm-net"
>   disk0_type="virtio-blk"
>   disk0_name="disk0"
>   disk0_dev="sparse-zvol"
> 
> 
> vm creation:
> 
>   vm create -t test-host -i FreeBSD-12.0-RELEASE-amd64.raw
> test-example-com vm start test-example-com
> 
> Network setup (on the VM):
> 
> root at freebsd:~ # ifconfig vtnet0 xx.xx.xx.xx/28 mtu 1400
> root at freebsd:~ # route add default yy.yy.yy.yy
> 
> could someone help me to figure out if this is a Bug, and if yes
> where it is?
> 
> Thanks
> Ole


-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 833 bytes
Desc: Digitale Signatur von OpenPGP
URL: <http://lists.freebsd.org/pipermail/freebsd-questions/attachments/20190926/daf3ea73/attachment.sig>