[libvirt] cpulimit and kvm process

[Jaromír Červenka]

  Hello,

is there any way how to set some initial nice? In XML maybe...?

Thank you.

Dne 1.10.2010 14:15, Richard W.M. Jones napsal(a):
> On Fri, Oct 01, 2010 at 10:03:28AM +0300, Mihamina Rakotomandimby wrote:
>> Manao ahoana, Hello, Bonjour,
>>
>> I would like to launch several KVM guests on a multicore CPU.
>> The number of the KVM process is over the number of physical cores.
>>
>> I would like to limit each KVM process to say... 10% of CPU
>>
>> I first use "cpulimit "
>>
>> Would you know some better way to limit them? it's in order to avoid 4
>> VM to hog all the 4 hardware cores.
> KVM processes are just like Linux processes, so you can pin them and
> renice them.
>
> There is support for pinning virtual CPUs to physical CPUs in libvirt,
> eg:
>
>    virsh vcpupin GuestName 0 0
>
> but you can also use Linux tools.  "tuna" is one such program which I
> think is in Fedora, or upstream here:
>
>    http://git.kernel.org/?p=linux/kernel/git/acme/tuna.git;a=summary
>
> Another tool is "renice".
>
> Rich.
>