search for: schedinfo

...nts on qemu version in order to use the "numatune" and/or "cpu/numa/cell" elements? Or do they use cgroups and not the native qemu numa support? Second, are there any instructions on how to set up cgroups? I initially hadn't had cgroups mounted and running "virsh schedinfo <domain>" gave an error. So I mounted "/sys/fs/cgroup/memory" and "/sys/fs/cgroup/cpu" and restarted libvirtd but running "virsh schedinfo <domain>" still gives an error: root@compute-1:~# virsh schedinfo 8 Scheduler : Unknown error: Requested...

Hi techs, Could you please explain or refer me to documentation where I could find a description of global_quota schedinfo option. Someone told me that it could mean a cpu limitation in percents like: global_quota : 25000 (does it mean cpu limit % set to 25 ?) Is it true? What other parameters mean in below output? I didn't find any related documentation at libvirt.org. Could you help me to describe me or refer...

...troduced in qemu-2.1.0. As of libvirt, you'll need libvirt-1.2.7 at least. Although the newer the better - there were couple of fixes recently. > > > Second, are there any instructions on how to set up cgroups? I > initially hadn't had cgroups mounted and running "virsh schedinfo > <domain>" gave an error. So I mounted "/sys/fs/cgroup/memory" and > "/sys/fs/cgroup/cpu" and restarted libvirtd but running "virsh schedinfo > <domain>" still gives an error: > > root@compute-1:~# virsh schedinfo 8 > Scheduler...

libvirt schedinfo : ------------------ What is the meaning of the 'cap' parameter in the schedinfo virsh command (what are the units and range of values ) and what is the 'weigth' parameter ? Zvi Dubitzky Email:dubi at il.ibm.com

Hi, How can I add ''schedinfo'' to the domU configuration? These parameters are default after reboot. -- Regards, Piotr Jasiukajtis | estibi | SCA OS0072 http://estseg.blogspot.com

...to cause vCPUs to dominate the total time of the CPUs they are pinned to. Here are the sched info parameters: Scheduler : posix cpu_shares : 0 vcpu_period : 0 vcpu_quota : 0 emulator_period: 0 emulator_quota : 0 The documentation ( http://libvirt.org/sources/virshcmdref/html/sect-schedinfo.html) is not yet filled for this. If anyone can explain these parameters, or point me to relevant code it would be helpful! Thanks Yasser

Hi I tried to restrict usage of some running VM by cpu.shares (i.e. set to 10 from original 1024) on loaded system and it seem doesn't work as I expected... all running processes has same CPU usage (by htop) :-/ Does anyone has same experience? Fedora 19, libvirt-1.0.5.9-1.fc19.x86_64 Thanks a lot Martin -- Martin Pavlásek <mpavlase@redhat.com> OpenStack QA Associate/Red Hat

On Thu, Nov 02, 2017 at 03:03:56PM +0200, Volo M. wrote: >Hi techs, > >Could you please explain or refer me to documentation where I could find a >description of global_quota schedinfo option. Someone told me that it could >mean a cpu limitation in percents like: >global_quota : 25000 (does it mean cpu limit % set to 25 ?) > The _quota values are relative to the _period, both in milliseconds and refer to the cumulative CPU time available to all the processes/threads...

I have fedora14 installed with standard libvirt-0.8.3. I can start VM using .xml files and also run: virsh schedinfo. the cgroup CPU controller is mounted and active . In fact I have the path to the Virtual machine : /dev/cgroup/cpu/libvirt/qemu/<vm name > Now I upgraded to libvirt-0.8.8 from a tar ball ( configure , make , make install) . I rebooted , new libvirtd started . virsh is working ok (I ca...

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

Hi, I have one RHEL 5.5 Xen box and one RHEL 5.5 KVM box. In the Xen box, the following command works well: $ virsh schedinfo RHELu3T Scheduler : credit weight : 256 cap : 0 But in KVM box, it can not work: $ virsh schedinfo RHEL5u3 Scheduler : Unknown error: this function is not supported by the hypervisor: virDomainGetSchedulerType Is it because that the libvirt APIs virDomainGetSchedulerP...

...oaded system and it seem doesn't work as I >> expected... all running processes has same CPU usage (by htop) :-/ > > How exactly are you changing the cgroup settings? Are you trying to > directly modify cgroup files (unsupported), or using the libvirt API > (such as via virsh schedinfo)? > Via mounted virtualfs - /sys/fs/cgroup/cpu/machine/<name-of-VM>/{emulator,vcpu0}/cpu.shares -- -- Martin Pavlásek <mpavlase@redhat.com> OpenStack QA Associate/Red Hat Czech/BRQ irc: mpavlase

...bvirt-0.8.8 > Message-ID: > <OF06ABB03A.CFC8CAEA-ONC2257860.00546582-C2257860.00556403 at il.ibm.com> > Content-Type: text/plain; charset="US-ASCII" > > I have fedora14 installed with standard libvirt-0.8.3. I can start VM > using .xml files and also run: virsh schedinfo. the cgroup CPU > controller is mounted and active . In fact I have the path to the Virtual > machine : /dev/cgroup/cpu/libvirt/qemu/<vm name > > > Now I upgraded to libvirt-0.8.8 from a tar ball ( configure , make , make > install) . I rebooted , new libvirtd started...

...t; will get twice the CPU scheduler time of the former. If the latter >> VM is completely idle though, the former VM will not be capped in any >> way. >> >> If you want absolute caps then you need to use period/quota settings. >> Also you want todo this via the virsh schedinfo command, not accessing >> cgroups directly. >> >> Regards, >> Daniel > Thanks Daniel for reply, nice example! > In my case I've got quite weird results > > guest: dd if=/dev/zero of=/dev/null for simulating heavy load > host: dd if=... same as guest (to...

...", "/dev/net/tun", ] /etc/cgconfig.conf mount { cpu = /dev/cgroup/cpu; cpuacct = /dev/cgroup/cpuacct; devices = /dev/cgroup/devices; # memory = /dev/cgroup/memory; blkio = /dev/cgroup/blkio; } When I'm running virsh, and want to change cpu shares I receive an error virsh # schedinfo --set cpu.shares=2048 test Scheduler : posix error: internal error cannot find cgroup for domain test Really I didn't have any group test in $ ls /dev/cgroup/cpu/sysdefault/libvirt/qemu/ cgroup.clone_children cgroup.event_control cgroup.procs cpu.shares notify_on_release tasks It happ...

Hello, I have another question about cgroup in libvirt I create a script that put vm in cgroup for limiting blkio sudo cgcreate -f 750 -d 750 -a $user:$group -g blkio:$alias pid=`pgrep $alias` echo $pid > /dev/cgroup/blkio/$alias/tasks $virsh schedinfo --set cpu_shares=$cpu $alias echo "8:0 $disk_io" > /dev/cgroup/blkio/$alias/blkio.throttle.read_bps_device echo "8:0 $disk_io" > /dev/cgroup/blkio/$alias/blkio.throttle.write_bps_device For example I write: 8:0 10485760 to /dev/cgroup/blkio/$alias/blkio.throttle.*_bps_dev...

I have 2 VMs launched by : 'virsh create <xml file>' . Both VMs get 2 vcpus (out of total 2 cores of the host) I then try bias their cpu cycle quota by manipulating the cpu_shares ( virsh schedinfo --set cpu_shares=<value> vm1/2 ) so that VM1 will get 3 times the cpu cycles VM2 gets. (e.g : VM1 cpu_shares = 150 . VM2 cpu_shares = 50) . There are no other VMs defined or any other significant process running on the host . Each VM runs the same process (2 threads endless loop ). Still...

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.

...rom original 1024) on loaded system and it seem doesn't work as I > expected... all running processes has same CPU usage (by htop) :-/ How exactly are you changing the cgroup settings? Are you trying to directly modify cgroup files (unsupported), or using the libvirt API (such as via virsh schedinfo)? -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org

Hi I was asking about the fedora 14 kernel if it is good enough for cgroup usage because I am trying to set a cgroup under cpu subsytem ( /dev/cgroup/cpu/group1/ ) that have /cpu.rt_runtime_us of 100000 while cpu.rt_period_us has a value of 1000000 i.e a ratio of 1/10 . still when I run a task (endless loop) in that group (cgexec -g cpu,cpuset:group1 ./test) it gets all the cpu core time