[ovirt-users] VMs using hugepages

[Michal Skrivanek]

> On 31 May 2016, at 14:30, Ralf Schenk <rs at databay.de> wrote:
> 
> Hello,
> 
> I try to get VM's to use hugepages by default. We use them on our manual VM's set up for libvirt and experience performance advantages. I installed vdsm-hook-hugepages, but according to http://www.ovirt.org/develop/developer-guide/vdsm/hook/hugepages/ <http://www.ovirt.org/develop/developer-guide/vdsm/hook/hugepages/> I have to set hugepages=SIZE. Engine Web-Fronted doesn't show an option anywhere to specify this. 
> 

It uses transparent hugepages for quite some time, which kind of obsoleted the hook. Do you really need/want to explicitly configure hugepages, is THP not good enough for your case?
(though, I tried the hook not so long ago and it did its job, so not sure what’s the problem…, it’s just annoying to configure it:)

Thanks,
michal

> I want the VMs to have:
> 
>   <memoryBacking>
>     <hugepages/>
>   </memoryBacking>
> 
> Any hint ?
> Versions:
> 
> vdsm.noarch                           4.17.28-0.el7.centos       @ovirt-3.6
> vdsm-cli.noarch                       4.17.28-0.el7.centos       @ovirt-3.6
> vdsm-gluster.noarch                   4.17.28-0.el7.centos       @ovirt-3.6
> vdsm-hook-hugepages.noarch            4.17.28-0.el7.centos       @ovirt-3.6
> vdsm-hook-vmfex-dev.noarch            4.17.28-0.el7.centos       @ovirt-3.6
> vdsm-infra.noarch                     4.17.28-0.el7.centos       @ovirt-3.6
> vdsm-jsonrpc.noarch                   4.17.28-0.el7.centos       @ovirt-3.6
> vdsm-python.noarch                    4.17.28-0.el7.centos       @ovirt-3.6
> vdsm-xmlrpc.noarch                    4.17.28-0.el7.centos       @ovirt-3.6
> vdsm-yajsonrpc.noarch                 4.17.28-0.el7.centos       @ovirt-3.6
> 
> Engine:
> ovirt-engine.noarch                        3.6.6.2-1.el7.centos       @ovirt-3.6
> 
> -- 
> 
> <logo_databay_email.gif>
> 
> Ralf Schenk
> fon +49 (0) 24 05 / 40 83 70
> fax +49 (0) 24 05 / 40 83 759
> mail rs at databay.de <mailto:rs at databay.de>
>  	
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