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Hi all: I have an Ubuntu 18.04 system. What is the easiest way to run all of my virtual machines with a low priority? Say a "nice" level of 15. I just do not want my virtual machines to have too much of an impact in any other processes on the system. Thanks in advance, rdiez

...04 system. What is the easiest way to run all of my virtual machines with a low priority? Say a "nice" level of 15. > > You can use the <vcpusched> (and related elements) to control > the schedular nice level up or down > > https://libvirt.org/formatdomain.html#elementsCPUTuning Thanks for your quick answer. I took at look at that documentation, but I did not quite understand it. It talks about vCPUs and how they are scheduled. My guess is that it is all about how those virtual CPUs are scheduled against each other. However, I wanted to lower the priority of all vir...

On 4/13/2015 1:18 PM, Kashyap Chamarthy wrote: > On Mon, Apr 13, 2015 at 12:14:12PM +0530, Jatin Davey wrote: >> Hi All >> >> I am new to KVM world. I have been using VMware for about a year. >> >> In VMware world we can reserve cpu resources for a VM. Say for instance if >> we need 4 vCPUs with a total of 8000 GHz then we can mention this >>

...; core's to the virtual cpus. Okay. I don't notice an option to regulate CPU freq. But the closest I see is the 'quota' XML attribute (as part of 'cputune' element) that will "ensure that all vcpus run at the same speed." https://libvirt.org/formatdomain.html#elementsCPUTuning -- /kashyap

Is it possible to set the CPU frequency exposed to the guest operating system for a kvm-enabled virtual machine ? The documentation does not mention anything about it. Thanks.

Hi, How do Hard limit a CPU allowance to 25% of a single core in KVM? Regards, Shashwat Shagun

...> I have an Ubuntu 18.04 system. What is the easiest way to run all of my virtual machines with a low priority? Say a "nice" level of 15. You can use the <vcpusched> (and related elements) to control the schedular nice level up or down https://libvirt.org/formatdomain.html#elementsCPUTuning Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|

...siest way to run all of my virtual machines with a low priority? Say a "nice" level of 15. > > > > You can use the <vcpusched> (and related elements) to control > > the schedular nice level up or down > > > > https://libvirt.org/formatdomain.html#elementsCPUTuning > > Thanks for your quick answer. > > I took at look at that documentation, but I did not quite understand it. It > talks about vCPUs and how they are scheduled. My guess is that it is all > about how those virtual CPUs are scheduled against each other. > > However, I...

Hi, Seems this question is not related with libvirt directly, but I still want to ping this list to see if someone can be help. The OS in my desktop box is Ubuntu 12.10, the kernel is 3.5.1. I installed the cgroup utility package with:#apt-get install cgroup-bin, but after I installed these packages successfully, I can't find cpu_quota/cpu_period controller in the /sys/fs/cgroup/cpu folder.

Hi , I was previously using xen and currently moved to KVM. I am using libvirt to manage these VMs. In den's credit scheduler , I had the ability to set a cap on the cpu usage for a VM. But I was not able to find a similar substitute in KVM. I find that we can use cgroups to provide shares for VM but that will be more like weight based and it doesn't set a hard cap for that VM. I tried

Hello libvirt users, I'm using the cgroup with QEMU guests. At /etc/libvirt/qemu.conf, I have the following parameter: cgroup_controllers = [ "cpu" ] This controller is successfully mounted and libvirt is able to create subgroups for each VM, it's really great the cgroups support in libvirt. The problem is that I can only set the parameters of a given cgroup under the cpu

.... I have a CentOS 5.n VM running on a Fedora 14 server/host, installed using virt-manager, pretty plain vanilla. I use it to compile binaries to run under RHEL/CentOS 5.n OS. I occasionally notice that when the VM gets paged out by the server, it takes several minutes to get it back in :-/ (see below). On the host, logged in to a shell through a terminal window, this A.M.: [wam at Q6600,

Hi, These are my doubts: 1. I tried live migration of Ubuntu 11.04 from the one physical machine to another using the migrate() function. I connected via tcp in the destination URI and migrated successfully(lesser than 2 seconds). I tried running virsh list --all on the destination PM and confirmed that the VM had been migrated successfully. When I tried checking ps aux | grep vmname where