FreeBSD Port: emulators/virtio-kmod - poor performance in VirtualBox

Marek Salwerowicz marek_sal at
Mon Nov 26 00:55:37 UTC 2012


I would like to test the 'intnet' networking mode in VirtualBox 4.2.4 
(under FreeBSD 9.1-PRERELEASE), running 2 VMs with FreeBSD 9.1-RC3 amd64 

After installing your port kernel detected the 'virtio' interface and I 
configured the IP on both machines.

I used the 'ttcp' program to test the network performance between 
machines and I noticed that average transfer rate is around 6-7 KB/s 
(while using eg. the Intel emulator, |82540EM, it's much better, around 
100 KB/s)

Do you have an idea why this is so slow?

And why the if_vtnet network driver isn't provided in GENERIC kernel? Is 
it still under development?


Marek Salwerowicz

More information about the freebsd-ports mailing list