[Xen-users] Re: HVM CPU usage 100% after the migration

[cendhu <cendhu@xxxxxxxxx>]

Solved.

Problem was due to the line "maxmem=2048" in the config file.

After removing this line, HVM's CPU usage is between 0 to 2%

But the maxmem is a valid option for HVM config file.

On Fri, Sep 24, 2010 at 3:25 PM, cendhu <cendhu@xxxxxxxxx> wrote:

Hi,

   I am not running any application inside the HVM. But, after the migration, it always uses 100% cpu.

Xen : 4.0.1

Dom0: Ubuntu 10.04 Server & 2.6.32-bpo.4-xen-amd64

HVM : Ubuntu 10.04 Server 

Xentop Value before the Migration (Sample)

 NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) MAXMEM(%) VCPUS 

 Domain-0 -----r       6965      2.7            647168   15.7       no limit         n/a                 1   

 lucid_hvm -----r        567      0.5            2101220   50.9     2101248       50.9                1  

I am using the following command to perform the migration

$xm migrate --live lucid_hvm 192.168.100.11

Xentop Value after the Migration (Sample)

 NAME  STATE   CPU(sec) CPU(%)     MEM(k) MEM(%)  MAXMEM(k) MAXMEM(%) VCPUS 

 Domain-0 -----r       3965      5.7            642163   15.7       no limit         n/a                 1   

 lucid_hvm -----r        569      100.0        2101220   50.9     2101248       50.9               1  

This is how HVM config file looks

   import os, re

   arch = os.uname()[4]

   

   kernel = "/usr/lib/xen/boot/hvmloader"

   

   builder='hvm'

   

   memory = 2048

   maxmem=2048

   shadow_memory = 8

  

  name = "lucid_hvm"

  

  vif = [ 'mac=00:B6:3E:E8:41:2E' ]

  disk = [ 'file:/vmimage/lucid_hvm.img,xvda,w', 'file:/vmimage/ubuntu-10.04.1-server-i386.iso,xvdc:cdrom,r' ]

 

  device_model = '/usr/lib/xen/bin/qemu-dm'

 

  boot="c"

  

  sdl=0

  vnc=1

  vnclisten="0.0.0.0"

  vncconsole=1

  vncpasswd='xyz'

  stdvga=0

  serial='pty'

  usbdevice='tablet'

  

 >

 on_reboot   = 'restart'

 on_crash    = 'restart'

Thanks,

cendhu

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