Re: [Xen-users] understanding xm top

["Liang Yang" <multisyncfe991@xxxxxxxxxxx>]

So the "whole box" means the CPU utilization for each domain is the percentage by all available CPUs? For example, suppose I have four CPUs and domain0/domainU each has one VCPU (mapped to a fixed physial CPU). If xm top shows 10% CPU utilization for domain0, it means the CPU utilization in domain0 is 10% of FOUR physcial CPUs. Is this right?

 

Thanks,

 

Liang

 

----- Original Message -----

From: Tommie McAfee

To: john maclean

Cc: Xen Users

Sent: Wednesday, November 15, 2006 8:28 AM

Subject: Re: [Xen-users] understanding xm top

These values are for the "whole box" meaning: whatever you start dom0 with, whatever you start a domU with, xm top will show.  They will not change even after doing vcpu-sets or mem-sets, and so they do always match with xm list.

On 11/11/06, john maclean <jayeola@xxxxxxxxx> wrote:

For the output of 'xm top', are the %mem and %cpu fields the
percentages for the totals or the amount that they have been
allocated? For example:-

acid:~# xm list
Name                              ID Mem(MiB) VCPUs State  Time(s)
Domain-0                           0      256     1 r-----  3825.9
bxvm                               1      128     1 ------   355.4
cxvm                               3      128     1 -b----    76.1
cxvm0                              8       64     1 -b----   383.5
exvm                               9       98     1 ------   198.4

If xm top showed
     NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k)
MAXMEM(%) VCPUS NETS NETTX(k) NETRX(k) SSID
  Domain-0 -----r       3847     6.5     262148   25.2   no limit
n/a     1    8    31428   456290    0
      bxvm --b---        356    0.6      68376    6.6      73728
7.1     1    1    30490    19836    0
     cxvm0 --b---        383    0.0       65348    6.3      65536
6.3     1    1     4065   168943    0
      exvm --b---        199    0.9      64328    6.2      65536
6.3     1    1     1095      718    0
      cxvm --b---         76    0.0      64320     6.2      65536
6.3     1    1      994     4902    0

Are the  CPU(%) and MAXMEM(%)  a percentage of the total cpu and mem
for the whole box or just what they have been allocated, as shown by
`xm list`?

Thanks Chaps.

--
John Maclean  - 07739 171 531
MSc (DIC)

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