libvirt users - Jun 2014 - Cannot obtain CPU freq during vbox machine creation

Dear libvirt experts,

I can not instantiate even a simple machine when using the 'vbox'
hypervisor:

s14% virt-install --connect=vbox:///session --virt-type vbox --name vtest
--memory 500
ERROR    cannot obtain CPU freq: No such file or directory

s14% virsh -c vbox:///session
błąd: cannot obtain CPU freq: No such file or directory
(1)

How to fix this error? The VirtualBox driver seems to be installed:

s14% virsh -V
Narzędzie wiersza poleceń virsh biblioteki libvirt 1.2.5
Proszę zobaczyć stronę WWW pod adresem http://libvirt.org/

Compiled with support for:
 Hypervisors: QEMU/KVM UML VMWare PHYP VirtualBox ESX Test
 Networking: Remote Bridging
 Storage: Dir SCSI
 Miscellaneous: Daemon Secrets Debug Readline Modular

s14% uname -a
FreeBSD s14 9.3-PRERELEASE FreeBSD 9.3-PRERELEASE #0: Fri May 16 06:45:56 CEST 2
014
.


Yours faithfully,
    Tomasz Kowal

On Thu, Jun 05, 2014 at 11:00:43PM +0200, Tomasz Kowal
wrote:
> Dear libvirt experts,
> 
> I can not instantiate even a simple machine when using the 'vbox'
hypervisor:
> 
> s14% virt-install --connect=vbox:///session --virt-type vbox --name vtest
--memory 500
> ERROR    cannot obtain CPU freq: No such file or directory
> 
> s14% virsh -c vbox:///session
> błąd: cannot obtain CPU freq: No such file or directory
That error message means the following system call is failing

    if (sysctlbyname("dev.cpu.0.freq", &cpu_freq,
&cpu_freq_len, NULL, 0) < 0) {
        virReportSystemError(errno, "%s", _("cannot obtain CPU
freq"));
        return -1;
    }

Afraid I don't know enough about FreeBSD to say why that might
fail, but there's obviously something unexpected in the setup
or deployment of your system that differs from what we previously
had tested with.


Regards,
Daniel
-- 
|: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
|: http://libvirt.org              -o-             http://virt-manager.org :|
|: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
|: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc :|

On 05.06.2014 23:00, Tomasz Kowal wrote:
> Dear libvirt experts,
> 
> I can not instantiate even a simple machine when using the 'vbox'
hypervisor:
> 
> s14% virt-install --connect=vbox:///session --virt-type vbox --name vtest
--memory 500
> ERROR    cannot obtain CPU freq: No such file or directory
> 
> s14% virsh -c vbox:///session
> błąd: cannot obtain CPU freq: No such file or directory
> (1)
> 
> How to fix this error? The VirtualBox driver seems to be installed:
> 
> s14% virsh -V
> Narzędzie wiersza poleceń virsh biblioteki libvirt 1.2.5
> Proszę zobaczyć stronę WWW pod adresem http://libvirt.org/
> 
> Compiled with support for:
>   Hypervisors: QEMU/KVM UML VMWare PHYP VirtualBox ESX Test
>   Networking: Remote Bridging
>   Storage: Dir SCSI
>   Miscellaneous: Daemon Secrets Debug Readline Modular
> 
> s14% uname -a
> FreeBSD s14 9.3-PRERELEASE FreeBSD 9.3-PRERELEASE #0: Fri May 16 06:45:56
CEST 2
This is interesting. We have a code for getting this info on FreeBSD, but for
some reason it's not working on your system:

src/nodeinfo.c=1041=int nodeGetInfo(virNodeInfoPtr nodeinfo)
--
src/nodeinfo.c-1083-    unsigned long cpu_freq;
src/nodeinfo.c-1084-    size_t cpu_freq_len = sizeof(cpu_freq);
src/nodeinfo.c-1085-
src/nodeinfo.c-1086-# ifdef __FreeBSD__
src/nodeinfo.c-1087-    if (sysctlbyname("dev.cpu.0.freq",
&cpu_freq, &cpu_freq_len, NULL, 0) < 0) {
src/nodeinfo.c:1088:        virReportSystemError(errno, "%s",
_("cannot obtain CPU freq"));
src/nodeinfo.c-1089-        return -1;
src/nodeinfo.c-1090-    }
src/nodeinfo.c-1091-
src/nodeinfo.c-1092-    nodeinfo->mhz = cpu_freq;
src/nodeinfo.c-1093-# else
src/nodeinfo.c-1094-    if (sysctlbyname("hw.cpufrequency",
&cpu_freq, &cpu_freq_len, NULL, 0) < 0) {
src/nodeinfo.c:1095:        virReportSystemError(errno, "%s",
_("cannot obtain CPU freq"));
src/nodeinfo.c-1096-        return -1;
src/nodeinfo.c-1097-    }
src/nodeinfo.c-1098-
src/nodeinfo.c-1099-    nodeinfo->mhz = cpu_freq / 1000000;
src/nodeinfo.c-1100-# endif

I guess the sysctlbyname() call on te line 1087 failed, but I'm not sure
why. Maybe the name is version dependent?

Michal

Tomasz Kowal wrote:
> Dear libvirt experts,
> 
> I can not instantiate even a simple machine when using the 'vbox'
hypervisor:
> 
> s14% virt-install --connect=vbox:///session --virt-type vbox --name vtest
--memory 500
> ERROR    cannot obtain CPU freq: No such file or directory
> 
> s14% virsh -c vbox:///session
> błąd: cannot obtain CPU freq: No such file or directory
> (1)
> 
> How to fix this error? The VirtualBox driver seems to be installed:
> 
> s14% virsh -V
> Narzędzie wiersza poleceń virsh biblioteki libvirt 1.2.5
> Proszę zobaczyć stronę WWW pod adresem http://libvirt.org/
> 
> Compiled with support for:
>  Hypervisors: QEMU/KVM UML VMWare PHYP VirtualBox ESX Test
>  Networking: Remote Bridging
>  Storage: Dir SCSI
>  Miscellaneous: Daemon Secrets Debug Readline Modular
> 
> s14% uname -a
> FreeBSD s14 9.3-PRERELEASE FreeBSD 9.3-PRERELEASE #0: Fri May 16 06:45:56
CEST 2                                                                          
014
Hi,

Could you please show an output of the 'sysctl dev.cpu.0.freq' command?

PS I'm not aware of anybody using libvirtd on FreeBSD with the vbox
driver, so quite probably you're entering an unexplored territory. I've
tried connecting to 'vbox:///session' though and it worked, but I
didn't
go further.
> .
> 
> 
> Yours faithfully,
>     Tomasz Kowal
Roman Bogorodskiy