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 <[email protected] > wrote: > On Thu, Oct 30, 2014 at 10:46 AM, Xavier Naveira <[email protected]> > 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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