Hi Marty, Not sure though, but I don't see the clock speed mentioned at the service offering is set as a configuration parameter of the guest OS for kvm.
Rather the clock speed set for the service offering is used as a reference of the resource utilization while allocating host for the instances deployed using service offering. Pete: Which is the model number of the AMD processor you are using? >From KVM perspective,We can specify the number of vCPUs to be allocated to guests, also it supports which physical CPU to use: "--cpuset=CPUSET Set which physical cpus the guest can use. "CPUSET" is a comma separated list of numbers, which can also be specified in ranges or cpus to exclude. Example: 0,2,3,5 : Use processors 0,2,3 and 5 1-5,^3,8 : Use processors 1,2,4,5 and 8" Thanks, Jithin On Thu, Aug 15, 2013 at 10:08 PM, Marty Sweet <msweet....@gmail.com> wrote: > In KVM and cloudstack 4.1.1 VM clock speed is enforced by the service > offering set to the Guest VM. > > For example, if I were to make a service offering of 1vCPU running at 3Ghz > and I only have a host running (at clock speed) of 2Ghz then cloudstack > will refuse the start of the VM. > > You can see your processor statistics by running lshw -C CPU on the host, > the clock speed shown will be the actual host clock speed, regardless of > BIOS technologies which may throttle or boost the frequency at anytime > depending on load. > > Marty > > On Thursday, August 15, 2013, Pete Johnson wrote: > > > I am planning on running a mix of service offerings, mostly small but > > their will be some pretty large database/processing servers using 2+ > cores. > > Won't know how large yet. > > > > - Pete > > > > -----Original Message----- From: Bradley Hieber > > Sent: Thursday, August 15, 2013 12:07 PM > > To: users@cloudstack.apache.org > > Subject: Re: Variable speed CPUs > > > > What is the service offering for the guest machines? The service offering > > governs the type of virtual CPU presented to the guest. > > > > > > On Thu, Aug 15, 2013 at 12:04 PM, Pete Johnson <pjohnso...@verizon.net > > >wrote: > > > > Hi, > >> I have build a small private cloud for an R&D project for one of my > >> clients. I have 3 hosts each with 16gb memory and 8 cores (AMD) per > host. > >> I’m using Cloudstack 4.1 and hosts are Ubuntu 12.04 w/KVM. These > CPUs > >> can vary clock speeds based on bios settings which is enabled. The > >> Cloudstack dashboard correctly estimates the CPU clock speed at its MAX > of > >> 3500 MHz. But, when I log onto the guests and run virt-top it says > >> 1400MHz > >> which I assume is its current throttled down clock speed. I am still > >> setting things up and have not had the chance to put the hosts under > >> enough > >> load to see of it clocks up. My questions are: Does Cloudstack support > >> viewable clocked CPUs in hosts? How does Cloudstack support variable > >> clocked hosts from a real-time capacity load perspective and a usage > >> perspective. > >> Thanks > >> Pete Johnson > >> > > > > > > > > > > -- > > Brad > > >