I find that my version is 0.9.4.
[root@sbc11 ssubbiah]# virsh --version 0.9.4
Should I do some modifications,enable options or add some patch to get the capability to set cap ? Thanks for all your help.
I found this comment in the code:
/* If we does not know VCPU<->PID mapping or all vcpu runs in the same * thread, we cannot control each vcpu. So we only modify cpu bandwidth * when each vcpu has a separated thread.
I think that means that in order to use CPU caps, you have to also use <vcpupin> to call out the host CPU pinning to be used by the guest VCPUS.
The original implementation was here, although I don't see much documentation in that patch series. https://www.redhat.com/archives/libvir-list/2011-July/msg01389.html
Wen, can you help out here?
Thanks Eric and Hi Wen. I did use <vcpupin> now . This is that part of my config xml file : <vcpu>3</vcpu> <cputune> <vcpupin vcpu='2' cpuset='0-2'/> </cputune> This shows the vcpu affinity : [root@hgcc11 cloning_script]# virsh vcpuinfo rubis_ws VCPU: 0 CPU: 2 State: running CPU time: 5.6s CPU Affinity: yyyy VCPU: 1 CPU: 1 State: running CPU time: 0.1s CPU Affinity: yyyy VCPU: 2 CPU: 0 State: running CPU time: 0.1s CPU Affinity: yyy- [root@hgcc11 cloning_script]# virsh schedinfo rubis_ws Scheduler : posix cpu_shares : 1024 Still I get it as an invalid option : [root@hgcc11 cloning_script]# virsh schedinfo rubis_ws --set vcpu_quota=1100 Scheduler : posix error: invalid scheduler option: vcpu_quota=1100 If I try to add the quota option to the xml file : <vcpu>3</vcpu> <cputune> <vcpupin vcpu='2' cpuset='0-2'/> <quota>-1</quota> </cputune> I get : [root@hgcc11 cloning_script]# virsh create images/rubis_ws.xml error: Failed to create domain from images/rubis_ws.xml error: Unable to set cpu bandwidth quota: No such file or directory Eventhough I am using libvirt 0.9.4, I think I am missing something.
-- Eric Blake eblake@redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org
- Regards, Sethuraman Subbiah Graduate Student - NC state University M.S in Computer Science