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From "Pete Johnson" <pjohnso...@verizon.net>
Subject Re: Variable speed CPUs
Date Thu, 15 Aug 2013 17:28:04 GMT
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: users@cloudstack.apache.org
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 <msweet.dev@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 <pjohnson44@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
> >
> 


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