[libvirt-users] a question on vCPU setting for lxc

[sylecn]

Hi,

I'm not libvirt expect. My guess is that some vcpu settings only apply to
KVM/qemu backend. LXC is quite different from them.

If setting vcpu# is not effective for LXC container, you may need to use
cgroups.


--
Thanks,
Yuanle


On Mon, Mar 17, 2014 at 2:32 PM, WANG Cheng D <
Cheng.d.Wang at alcatel-sbell.com.cn> wrote:

>  Dear all,
>
> I am not clear about the 'vcpu' element for CPU allocation. I allocated 1
> vCPU to my container, after I started the container, I ran 4
> computation-intensive tasks on the container. And I found all the 4
> physical core are 100% used (my host has 4 physical cores and no other
> application ran on the host except the container). That is, all available
> cores were used by the container. I want to know how to give a hard
> limitation for CPU usage of a container.
>
> So I don't understand what 'vcpu' setting can be used for.
>
> I know that another CPU allocation element 'shares' can also be used, but
> this elements only give a relative quota. If new containers are started,
> the CPU quota for the already started containers will change.
>
> Regards,
>
> Cheng
>
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