virtualbox 4.2.4 tooooo slow

[Rusty Nejdl]

On 2012-11-21 07:18, Bernhard Fröhlich wrote:
> On Wed, Nov 21, 2012 at 9:24 AM, 진석오 <jsukoh at gmail.com> wrote:
>> Dear,
>> 
>> I installed virtualbox 4.2.4(CFT) on zfs FreeBSD 9.1-RC3
>> 
>> installing and windows guest(windows 8) install with guest addition 
>> was
>> successful.
>> but the windows guest is too slow, it is hardly usable.
>> 
>> my hardware specs.
>> intel i7 quad core 3.6. ghz, with 8 thread
>> mem 16G
>> motherboard - asrock z79 extreme 6.
>> intel SSD 120G.
>> 
>> 
>> my virtualbox vdi file is at zroot/bigfile, with
>> primaryache, secondarycache = NONE, even sync=disabled because of 
>> slow
>> performance.
>> 
>> virtual machine settings
>> - mem  4096M, cpu 4ea
>> - 25g vdi(SATA controller) with SSD ticked
>> - VT-x/AMD-V, Nested Paging
>> - video 128M
>> 
>> 
>> 
>> I tried the VB on UFS because ZFS was too slow, but the result was 
>> the
>> same..
>> I downgraded to FreeBSD 9.0 on UFS or / ZFS, but but the result was 
>> the
>> same..
>> and  I tried virtualbox 4.1.22 on FB 9.0/9.1-RC3,but but the result 
>> was the
>> same..
>> 
>> but sad story is that
>> I found that virtualbox 4.2.4 on linux(opensuse 12.2, ext4) was very 
>> fast.
>> opensuse is installed on the second harddisk(NOT SSD)  at the same 
>> computer.
>> 
>> virtualbox zfs/FreeBSD on SSD is much slower than virtualbox 
>> ext4/opensuse
>> on SATA2 harddisk...
>> 
>> 
>> do I have any miss to setup on FreeBSD? I do not want to reboot to 
>> linux
>> just because of virtualbox....
>> 
>> please let me know what I should do, if you use virtualbox on FreeBSD
>> without any problem...
>> 
>> thank you in advance...
>> 
>> from jsuk
> 
> I would start doing some easy tests to verify what slow really means.
> Is it related
> to CPU, I/O, network? What does top say on the host? Is the VM 
> consuming lots
> of CPU all the time or generating an unusual high number of 
> interrupts?
> 
> VirtualBox tries to use hardware CPU features for virtualization BUT 
> it also has
> a software emulation fallback (from QEMU I think) but that is 
> painfully slow so
> usually when someone says "vbox is slow" that is a sign of either your 
> CPU
> features weren't detected correctly or your BIOS has a bug and doesn't 
> announce
> them properly. In either case checking that you run the latest BIOS is
> a good idea.
> 
> If you had a look at that stuff please attach your ~/VirtualBox
> VMs/Logs/VBox.log

I wonder if you didn't install or kldload the virtualbox kernel modules 
on the FreeBSD host?  Can you send the output of kldstat from the host?

Rusty Nejdl