Slowness with Virtualbox

[Christer Solskogen]

Hi!

I wrote this yesterday without any response so far: 
https://forums.freebsd.org/threads/poor-performance-with-virtualbox-ose.53722/

Short story. My "pretty" fast FreeBSD server (host) runs Virtualbox 
guests (Linux/CentOS) very slowly. Much slower than I anticipated. I've 
had Linux on that box before with Virtualbox without the same slowness.
Where should I begin to look?

And by slow, I mean /slow/. I have a PXE boot system where I can boot 
and install via kickstart a CentOS system in just about 4 min on a 
Windows machine with VirtualBox. On my FreeBSD host it takes about 
10-15min. Network is slow, but disk seems to be OK.

If I put some load on the guest, the guest locks up and I loose network 
connection to it, while the console (from VirtualBox GUI) is not 
responding (but the GUI for VirtualBox is working properly)

Help, please!

FreeBSD friend 10.2-RELEASE-p4 FreeBSD 10.2-RELEASE-p4 #0 r288404: Thu 
Oct 22 22:58:13 CEST 2015     root at friend:/usr/obj/usr/src/sys/FRIEND  amd64

virtualbox-ose-4.3.32 (I have also tried the unofficial 5.x port, but 
with the same result)

-- 
chs