On 06/01/2011 08:54 AM, Dag Wieers wrote:
> On Wed, 1 Jun 2011, Jan van Eldik wrote:
>> Just to add that we different parameters on 32bit and 64bit SLC5 systems.
>> From https://cern.service-now.com/kb_view.do?sysparm_article=KB0000278
>>
>> * SLC5/x86_64: "divider=10 clock=pmtmr"
>> * SLC5/i386: "divider=10 clocksource=acpi_pm"
>> * SLC4/x86_64: "divider=10 notsc"
>> * SLC4/i386: "divider=10 notsc"
>>
>> These parameters seem to work fine on 500+ VMs
>
> Interesting, that's what we did:
>
> - EL5/x86_64: elevator=noop divider=10 notsc
> - EL5/i386: elevator=noop divider=10 clocksource=acpi_pm
> - EL4/x86_64: elevator=noop divider=10 notsc
> - EL4/i386: elevator=noop divider=10 clock=pmtmr
>
> So it's different for EL5/x86_64 and EL4/i386. This was based on:
>
> http://kb.vmware.com/kb/1006427
>

Interesting.  divider=10 notsc seems to do the trick for us.  clock=pmtmr 
didn't work.  The vmware KB indicates that nothing should be needed for 5.4+, 
but that doesn't appear to be the case for Hyper-V.  Thanks all.

-- 
Orion Poplawski
Technical Manager                     303-415-9701 x222
NWRA/CoRA Division                    FAX: 303-415-9702
3380 Mitchell Lane                  [log in to unmask]
Boulder, CO 80301              http://www.cora.nwra.com