[ovirt-users] Ovirt VM Performance abd CPU times

[Xavier Naveira]

These hardware is exactly the same, no changes in bios, reinstalled from
scratch.

The versions in the "old ones" are:

RHEL 5.6
kvm-83-224.el5
libvirt-0.8.2-15.el5_6.1
kmod-kvm-83-224.el5
kvm-tools-83-224.el5
libvirt-0.8.2-15.el5_6.1
Kernel: 2.6.18-238.1.1.el5 #1 SMP Tue Jan 4 13:32:19 EST 2011 x86_64 x86_64
x86_64 GNU/Linux

I the ovirt "new" ones:

RHEL 6.5
qemu-img-rhev-0.12.1.2-2.415.el6_5.14.x86_64
qemu-kvm-rhev-0.12.1.2-2.415.el6_5.14.x86_64
qemu-kvm-rhev-tools-0.12.1.2-2.415.el6_5.14.x86_64
libvirt-0.10.2-29.el6_5.12.x86_64
libvirt-client-0.10.2-29.el6_5.12.x86_64
Kernel: 2.6.32-431.23.3.el6.x86_64 #1 SMP Wed Jul 16 06:12:23 EDT 2014
x86_64 x86_64 x86_64 GNU/Linux

I haven't gone into the details but the command line generated by our old
software is like 2 lines of text while in the ovirt nodes for the same type
of machine it is 10 :)

X

On Thu, Oct 30, 2014 at 11:07 AM, Gianluca Cecchi <gianluca.cecchi at gmail.com
> wrote:

> On Thu, Oct 30, 2014 at 10:46 AM, Xavier Naveira <xnaveira at gmail.com>
> wrote:
>
>> I haven't tested the performance differences with or without HT. We were
>> running pure kvm-libvirt hosts on these machines and we're migrating them
>> to oVirt and that's what triggered the problem with the Redhat 5 vms.
>>
>>
> So a point is that the hw is the same and that the problem is only related
> to RH EL 5.x VMs.
> Also no change in BIOS settings.
> Did you reinstall from scratch?
>
> What about the sw?
> previously used version of Qemu/KVM and libvirt?
> current version of Qemu/KVM and libvirt with oVirt?
>
> Also, did you compare the qemu-kvm generated command line between plain
> Qemu/KVM and the one instantiated by oVirt?
>
>
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