Jithin, I have just tested this against my production setup running 4.1.1 on Ubuntu 12.04 w/ KVM, my mistake, the clockspeed of the service offering does not get passed to KVM. However, if the clockspeed of the service offering is higher than the host (3500Mhz in your case Pete), then the VM will not boot.
Pete are correct in thinking that Cloudstack will assume 3.5Ghz regardless of its actual clockspeed, this makes no difference as some processors do this anyway with no effect to applications. Thanks, Marty On Thu, Aug 15, 2013 at 6:35 PM, Jithin Raju <[email protected]> wrote: > Hi Pete, > > Could you please compare your results with the output of dmidecode and 'cat > /proc/cpuinfo' > > Thanks, > Jithin > > > On Thu, Aug 15, 2013 at 10:58 PM, Pete Johnson <[email protected] > >wrote: > > > I'm using AMD FX-8320 8-core 3.5 GHz processors with 16GB of unbuffered > > ECC memory. (they're the best cost/performance processor available) > > > > - Pete > > > > -----Original Message----- From: Jithin Raju > > Sent: Thursday, August 15, 2013 1:04 PM > > > > To: [email protected] > > Subject: Re: Variable speed CPUs > > > > 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 <[email protected]> > > 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: [email protected] > >> > 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 < > [email protected] > >> > >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 > >> > > >> > >> > > >
