<div dir="ltr">These hardware is exactly the same, no changes in bios, reinstalled from scratch.<div><br></div><div>The versions in the "old ones" are:</div><div><br></div><div>RHEL 5.6</div><div><div>kvm-83-224.el5</div><div>libvirt-0.8.2-15.el5_6.1<br></div><div>kmod-kvm-83-224.el5</div><div>kvm-tools-83-224.el5</div><div>libvirt-0.8.2-15.el5_6.1<br></div><div>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<br></div></div><div><br></div><div>I the ovirt "new" ones:</div><div><br></div><div>RHEL 6.5</div><div><div>qemu-img-rhev-0.12.1.2-2.415.el6_5.14.x86_64<br></div><div>qemu-kvm-rhev-0.12.1.2-2.415.el6_5.14.x86_64</div><div>qemu-kvm-rhev-tools-0.12.1.2-2.415.el6_5.14.x86_64</div><div>libvirt-0.10.2-29.el6_5.12.x86_64</div><div>libvirt-client-0.10.2-29.el6_5.12.x86_64</div></div><div>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</div><div><br></div><div>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 :)</div><div><br></div><div>X</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Oct 30, 2014 at 11:07 AM, Gianluca Cecchi <span dir="ltr"><<a href="mailto:gianluca.cecchi@gmail.com" target="_blank">gianluca.cecchi@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span class="">On Thu, Oct 30, 2014 at 10:46 AM, Xavier Naveira <span dir="ltr"><<a href="mailto:xnaveira@gmail.com" target="_blank">xnaveira@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">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.<div><br></div></div></blockquote><div><br></div></span><div>So a point is that the hw is the same and that the problem is only related to RH EL 5.x VMs.</div><div>Also no change in BIOS settings.</div><div>Did you reinstall from scratch?</div><div><br></div><div>What about the sw?</div><div>previously used version of Qemu/KVM and libvirt?</div><div>current version of Qemu/KVM and libvirt with oVirt?</div><div><br></div><div>Also, did you compare the qemu-kvm generated command line between plain Qemu/KVM and the one instantiated by oVirt?</div><div> </div></div></div></div>
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