[pve-devel] balloon stats on win2008r2 working

[Alexandre DERUMIER]

I have found a simple way to get it working.


- set polling interval at start (2) (current implementation)
  during boot, balloon info return only actual && max_mem.

- when windows will be booted,with balloon service on,
  info ballon will give us "last_update" value, but not free_mem.

  (last_update value is only return when balloon service is working).

- then,we simply need to launch
  qom-set path=/machine/peripheral/balloon0 property=stats-polling-interval value=3   (!= from initial value)

  and now balloon info return free_mem 


Note also that last_update value not increase before resend qom-set, so we can also check that, if it's not increasing, resend qom-set


What Do you think ?

----- Mail original ----- 

De: "Alexandre DERUMIER" <aderumier at odiso.com> 
À: "Dietmar Maurer" <dietmar at proxmox.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Mercredi 19 Décembre 2012 13:09:35 
Objet: Re: [pve-devel] balloon stats on win2008r2 working 

Works for me, 
but I need to send a stats-polling-interval != from the start stats-polling-interval 
(maybe it's not resend to the balloon driver if the value is equal) 

Don't know why balloon device works differently on windows, but it seem to get the stats-polling-interval value, only when windows is fully started. 


working (started with interval=2) 
-------------------------------- 
(QEMU) qom-get path=/machine/peripheral/balloon0 property=stats-polling-interval 
{u'return': 2} 
(QEMU) qom-get path=/machine/peripheral/balloon0 property=stat-free-memory 
{u'error': {u'class': u'GenericError', u'desc': u"timer hasn't been enabled or guest doesn't support 'stat-free-memory'"}} 
(QEMU) qom-set path=/machine/peripheral/balloon0 property=stats-polling-interval value=3 
{u'return': {}} 
(QEMU) qom-get path=/machine/peripheral/balloon0 property=stat-free-memory 
{u'return': 1765240832} 

non working (started with interval=2) 
------------------------------------ 
(QEMU) qom-get path=/machine/peripheral/balloon0 property=stats-polling-interval 
{u'return': 2} 
(QEMU) qom-get path=/machine/peripheral/balloon0 property=stat-free-memory 
{u'error': {u'class': u'GenericError', u'desc': u"timer hasn't been enabled or guest doesn't support 'stat-free-memory'"}} 
(QEMU) qom-set path=/machine/peripheral/balloon0 property=stats-polling-interval value=2 
{u'return': {}} 
(QEMU) qom-get path=/machine/peripheral/balloon0 property=stat-free-memory 
{u'error': {u'class': u'GenericError', u'desc': u"timer hasn't been enabled or guest doesn't support 'stat-free-memory'"}} 


----- Mail original ----- 

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Alexandre DERUMIER" <aderumier at odiso.com>, pve-devel at pve.proxmox.com 
Envoyé: Mercredi 19 Décembre 2012 12:45:31 
Objet: RE: [pve-devel] balloon stats on win2008r2 working 

that does not work here :-/ 

> -----Original Message----- 
> From: pve-devel-bounces at pve.proxmox.com [mailto:pve-devel- 
> bounces at pve.proxmox.com] On Behalf Of Alexandre DERUMIER 
> Sent: Mittwoch, 19. Dezember 2012 12:05 
> To: pve-devel at pve.proxmox.com 
> Subject: [pve-devel] balloon stats on win2008r2 working 
> 
> - I have just installed a win2008R2 (X64) 
> 
> install ballon driver 
> 
> -go to hardware devices management, find pci device without driver. 
> -> update driver->choose disk 
> 
> then using 0.48 virtio driver, choose the whl directory 
> 
> 
> 
> then install service (I put files in c:\program files\balloon) 
> 
> #cd c:\program files\balloon 
> #blnsrv --install 
> 
> #reboot 
> 
> then stats works 
> 
> (QEMU) qom-get path=/machine/peripheral/balloon0 property=stats- 
> polling-interval 
> {u'return': 0} 
> (QEMU) qom-set path=/machine/peripheral/balloon0 property=stats- 
> polling-interval value=10 
> {u'return': 10} 
> (QEMU) qom-get path=/machine/peripheral/balloon0 property=stats- 
> polling-interval 
> {u'return': 10} 
> (QEMU) qom-get path=/machine/peripheral/balloon0 property=stats-last- 
> update 
> {u'return': 1355914831} 
> (QEMU) qom-get path=/machine/peripheral/balloon0 property=stats-last- 
> update 
> {u'return': 1355914841} 
> (QEMU) qom-get path=/machine/peripheral/balloon0 property=stat-free- 
> memory 
> {u'return': 1765306368} 
> (QEMU) qom-get path=/machine/peripheral/balloon0 property=stat-total- 
> memory 
> {u'return': 2147074048} 
> (QEMU) qom-get path=/machine/peripheral/balloon0 property=stat-swap-in 
> {u'return': 2440} 
> (QEMU) qom-get path=/machine/peripheral/balloon0 property=stat-swap- 
> out 
> {u'return': 0} 
> (QEMU) 
> 
> 
> I didn't have tested it with setting polling interval at start, I'll try with your last 
> qemu-serve today 
> 
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