Re: [ovirt-users] Ovirt VM Performance abd CPU times

2014-11-11 Thread Xavier Naveira
Ok, so we found a solution that I thought I'll share in case this thread pops up in a future search. The problem was that our Redhat 5.x guests still run with a kernel that lacks the tickeless feature, meaning that they are poking the host a 1000 times per second even if they haven't anything to

Re: [ovirt-users] Ovirt VM Performance abd CPU times

2014-11-09 Thread Xavier Naveira
We tried a minimal installation from CD of RedHat 5.10 and it is the same. This should be fairly easy to reproduce: - Install a RedHat 6.5 hypervisor - Install a RedHat 5.10 guest in it - Enjoy your overused CPU Is there someone with a similar setup out there? Xavier On Fri, Nov 7, 2014 at

Re: [ovirt-users] Ovirt VM Performance abd CPU times

2014-11-07 Thread Xavier Naveira
Hi, We have installed and added a new hypervisor into the ovirt cluster but this time with disabled HT. I migrated a RedHat 5.10 machine to it and immediately the qemu-kvm process running the vm (freshly installed, just basic packages) began to consume 20-40% CPU as showed running top on the

Re: [ovirt-users] Ovirt VM Performance abd CPU times

2014-11-07 Thread Gianluca Cecchi
On Fri, Nov 7, 2014 at 10:48 AM, Xavier Naveira xnave...@gmail.com wrote: Hi, We have installed and added a new hypervisor into the ovirt cluster but this time with disabled HT. I migrated a RedHat 5.10 machine to it and immediately the qemu-kvm process running the vm (freshly installed,

Re: [ovirt-users] Ovirt VM Performance abd CPU times

2014-10-30 Thread 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

[ovirt-users] Ovirt VM Performance abd CPU times

2014-10-29 Thread Xavier Naveira
Hi, We are migrating our ifrastructure from kvm+libvirt hypervisors to ovirt. Everything is working fine but we're noticing that all the qemu-kvm processes in the hypervisors take a lot of CPU. The typical example is an idle machine, running top from the machine itself it reports cpu use

Re: [ovirt-users] Ovirt VM Performance abd CPU times

2014-10-29 Thread Daniel Helgenberger
On 29.10.2014 10:21, Xavier Naveira wrote: Hi, We are migrating our ifrastructure from kvm+libvirt hypervisors to ovirt. Everything is working fine but we're noticing that all the qemu-kvm processes in the hypervisors take a lot of CPU. Without further details of the workload this is hard

Re: [ovirt-users] Ovirt VM Performance abd CPU times

2014-10-29 Thread Daniel Helgenberger
On 29.10.2014 11:48, Xavier Naveira wrote: On 10/29/2014 11:47 AM, Xavier Naveira wrote: On 10/29/2014 11:40 AM, Daniel Helgenberger wrote: On 29.10.2014 10:21, Xavier Naveira wrote: Hi, We are migrating our ifrastructure from kvm+libvirt hypervisors to ovirt. Everything is working fine

Re: [ovirt-users] Ovirt VM Performance abd CPU times

2014-10-29 Thread Xavier Naveira
On 10/29/2014 03:07 PM, Xavier Naveira wrote: On 10/29/2014 01:26 PM, Daniel Helgenberger wrote: On 29.10.2014 11:48, Xavier Naveira wrote: On 10/29/2014 11:47 AM, Xavier Naveira wrote: On 10/29/2014 11:40 AM, Daniel Helgenberger wrote: On 29.10.2014 10:21, Xavier Naveira wrote: Hi, We

Re: [ovirt-users] Ovirt VM Performance abd CPU times

2014-10-29 Thread Daniel Helgenberger
On 29.10.2014 15:57, Xavier Naveira wrote: On 10/29/2014 03:07 PM, Xavier Naveira wrote: On 10/29/2014 01:26 PM, Daniel Helgenberger wrote: On 29.10.2014 11:48, Xavier Naveira wrote: On 10/29/2014 11:47 AM, Xavier Naveira wrote: On 10/29/2014 11:40 AM, Daniel Helgenberger wrote: On

Re: [ovirt-users] Ovirt VM Performance abd CPU times

2014-10-29 Thread Xavier Naveira
On 10/29/2014 04:06 PM, Daniel Helgenberger wrote: On 29.10.2014 15:57, Xavier Naveira wrote: On 10/29/2014 03:07 PM, Xavier Naveira wrote: On 10/29/2014 01:26 PM, Daniel Helgenberger wrote: On 29.10.2014 11:48, Xavier Naveira wrote: On 10/29/2014 11:47 AM, Xavier Naveira wrote: On

Re: [ovirt-users] Ovirt VM Performance abd CPU times

2014-10-29 Thread Xavier Naveira
On 10/29/2014 04:29 PM, Xavier Naveira wrote: On 10/29/2014 04:06 PM, Daniel Helgenberger wrote: On 29.10.2014 15:57, Xavier Naveira wrote: On 10/29/2014 03:07 PM, Xavier Naveira wrote: On 10/29/2014 01:26 PM, Daniel Helgenberger wrote: On 29.10.2014 11:48, Xavier Naveira wrote: On

Re: [ovirt-users] Ovirt VM Performance abd CPU times

2014-10-29 Thread Xavier Naveira
On 10/29/2014 05:15 PM, Daniel Helgenberger wrote: On 29.10.2014 16:44, Xavier Naveira wrote: On 10/29/2014 04:29 PM, Xavier Naveira wrote: On 10/29/2014 04:06 PM, Daniel Helgenberger wrote: On 29.10.2014 15:57, Xavier Naveira wrote: On 10/29/2014 03:07 PM, Xavier Naveira wrote: On