What is the standard procedure for CPU usage calculation for "Two" Core Dom0..?

What is the standard procedure for CPU usage calculation for "Two" Core Dom0..?

[kushal waikar]

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Hi,
    I am using "XenAPI -1.0.6" ... I have "Dual Core" machine on which I am working..I am trying   to fetch Dom-0 CPU utilization using XenAPI RPC "get_utilisation()"(class host cpu)....
    Since my machine is dual core this function is yielding me utilization of Core 1 & Core 2 separately(e.g Core ONE - 0.4241242424  & Core TWO - 0.3254842450)..I just want to calculate the overall CPU utilization in percentage for the Dom-0...What is the standard procedure in this case to calculate overall CPU utilization in percentage by considering above two CPU utilizations for each core ? 

Thanks,
Kushal Waikar
kushalwaikar@yahoo.co.in



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Re: [Xen-API] What is the standard procedure for CPU usage calculation for "Two" Core Dom0..?

[Zhigang Wang]

I think it's wrong to implement the API to return the percentage. if return
the actual usage, it should be better.

see: http://lists.xensource.com/archives/html/xen-devel/2008-09/msg00069.html

thanks,

zhigang

kushal waikar wrote:
> Hi,
>     I am using "XenAPI -1.0.6" ... I have "Dual Core" machine on which I
> am working..I am trying  to fetch Dom-0 CPU utilization using XenAPI RPC
> "get_utilisation()"(class host cpu)....
>     Since my machine is dual core this function is yielding me
> utilization of Core 1 & Core 2 separately(e.g Core ONE - 0.4241242424  &
> Core TWO - 0.3254842450)..I just want to calculate the overall CPU
> utilization in percentage for the Dom-0...What is the standard procedure
> in this case to calculate overall CPU utilization in percentage by
> considering above two CPU utilizations for each core ?
> 
> Thanks,
> Kushal Waikar
> kushalwaikar@yahoo.co.in
> 
> 
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