Re: [Xen-users] why xentop cpu utilities show over 100%

[Flako <subforos@xxxxxxxxx>]

2012/10/10 Jun Hu <duanshuidao@xxxxxxxxxxx>:
> Hi experts:
>
> why  cpu %  show 135.6%  which is over 100%ï
>
> how do I  compute exact cpu ulitities?
>
>
> xentop - 20:43:55   Xen 4.1.3_02-0.5.1
> 2 domains: 2 running, 0 blocked, 0 paused, 0 crashed, 0 dying, 0 shutdown
> Mem: 4122636k total, 4117100k used, 5536k free    CPUs: 2 @ 2793MHz
>       NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) MAXMEM(%)
> VCPUS NETS NETTX(k) NETRX(k) VBDS   VBD_OO   VBD_R
> D   VBD_WR  VBD_RSECT  VBD_WSECT SSID
>   Domain-0 -----r        184    4.8    1839104   44.6   no limit       n/a
> 2    0        0        0    0        0
> 0        0          0          0    0
> sles11sp2p -----r       1194  135.6    2097152   50.9    2097152      50.9
> 2    1      128       26    2        0     372
> 3     3360     121590     206784    0
>
>
>
>
> From: hu jun
> Sent: Friday, October 05, 2012 8:05 PM
> To: Mahesh Thiagarajan ; .
> Subject: Re: [Xen-users] virt-manager vs xentop
>
>
>
> ________________________________
> From: duanshuidao@xxxxxxxxxxx
> To: mahesh.thiagarajan@xxxxxxxxxx; xen-users@xxxxxxxxxxxxx
> Subject: RE: [Xen-users] virt-manager vs xentop
> Date: Fri, 5 Oct 2012 12:05:17 +0000
>
> how to calculate cpu ulitities in xentop ? It often appears numbers above
> 100%.
>
>
> this is my question too.
>
>
>> Date: Fri, 5 Oct 2012 10:52:52 +0530
>> From: mahesh.thiagarajan@xxxxxxxxxx
>> To: xen-users@xxxxxxxxxxxxxx
>> Subject: [Xen-users] virt-manager vs xentop
>>
>> Hi,
>>
>> To identify the suitable virtualization technology for a project, we
>> were evaluating XEN against openVZ in terms of CPU usage for a
>> networking application. The networking application indulges heavily in
>> data transfer between the virtual nodes/containers/OS's inside a high
>> end machine. While measuring the CPU usage of XEN, we see that the CPU
>> usage indicated by the virt-manager tool and xentop are way different.
>> In a four core machine, virt-manager indicates a cpu usage of 40% where
>> as xentop 130%.
>>

100% indicates a core (vcpu) to 100%, ie if there are 4 cores, xm top
could indicate 400%
the 135.6 indicate that sles11sp2p is using cores of 1.3 dom0

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
http://lists.xen.org/xen-users