Hi there, On Fri, Apr 26, 2013 at 9:09 AM, Christoph Pleger < [email protected]> wrote:
> Hello, > > > I have a new question about that. > > > > On http://opennebula.org/documentation:rel3.8:kvmg, I read about > cgroups: > > > > "So, thanks to cgroups a VM with CPU=0.5 will get half of the physical > CPU > > cycles than a VM with CPU=1.0." > > > > How can a second VM get half of the physical CPU cycles of a first VM if > > the first VM is defined to use 100 % of the CPU cycles? > > I'm not that much familiar with cgroups, but the way I understand it the first VM does not get 100%, it will get 1024 shares out of 1536 (2/3 of cpu time). > Does really nobody know that? Or was my question too difficult to > understand or just too stupid? > Relax buddy, this is a best-effort mailing list, not a commercial support service. > By the way, if every cloudnode has 64 cpu cores and a VM is defined to use > 64 virtual cpus, does for example CPU=0.8 mean 80 percent of one cpu core > or 80 percent of 64 cpu cores? > It will get allocated 80 from the total of 6400 Host CPU. The number of virtual CPUs is not related to the real CPU allocated. Regards > Regards > Christoph > > -- Carlos Martín, MSc Project Engineer OpenNebula - The Open-source Solution for Data Center Virtualization www.OpenNebula.org <http://www.opennebula.org/> | [email protected] | @OpenNebula <http://twitter.com/opennebula> <[email protected]>
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