Hello Andrija, Thanks for your input the OS Type for the systemVM template is set to "Debian GNU/Linux 8 (64-bit)"
I think I forgot to mention a very important aspect of my setup. This Cloudstack instance is powering XenServer and KVM where KVM was added recently. Your message made me think and look at my other (test lab) setup where CloudStack is only powering KVM hypervisors. I can confirm all VRs are running with virtio which implies there got to be something on the my mixed HV CloudStack. I will keep looking into this but if you have any further thoughts on this please let me know. Raf On 2020/05/15 11:14:37, Andrija Panic <andrija.pa...@gmail.com> wrote: > Rafal, > > what is the OS type you defined for the systemVM template? > > In my env, VR (VPC) - all interfaces are VirtIO. > > Best > Andrija > > On Fri, 15 May 2020 at 12:14, Rafal Turkiewicz <tur...@turexy.com> wrote: > > > Platform: > > CloudStack 4.11.2 on CentOS 7 > > KVM Hypervisor on CentOS 7 > > > > I have found some throughput issues on our VirtualRuters and I've tracked > > it down to CPU IRQ hitting 99% on the VR which was related to NIC > > interrupts. > > > > I decided to lookup what NIC is being emulated on the VRs; lsmod listed > > three Intel NICs: > > > > 00:03.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet > > Controller (rev 03) > > 00:04.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet > > Controller (rev 03) > > 00:05.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet > > Controller (rev 03) > > > > All my regular VMs are using Virtio network devices as specified within > > template settings nicAdapter=virtio > > > > When I manually updated the user_vm_details table for a VR with > > nicAdapter=virtio and restarted the VR everything came up as expected, the > > VR was started with virtio NICs and the IRQ issue was gone, also the > > throughput doubled. Now lspci on the VR was showing: > > > > 00:03.0 Ethernet controller: Red Hat, Inc Virtio network device > > 00:04.0 Ethernet controller: Red Hat, Inc Virtio network device > > 00:05.0 Ethernet controller: Red Hat, Inc Virtio network device > > > > The problem I have is getting the nicAdapter setting at systemvm template > > level like I do for regular VMs so that all VRs are deployed with virtio > > network adapter. I don't want to set this manually for every network I > > deploy. So I went to Templates -> Mysystemvm template -> Settings -> Add > > Setting > > > > Name: nicAdapter > > Value: virtio > > > > BUT it just looks to me like systemvms don't honour vm_template_details > > table where nicAdapter is specified. When a VR gets created, I looked up > > content of the user_vm_details for the VR and found nicAdapter=virio is > > missing but I would expect it to be there. > > > > If there is anyone running CloudStack with KVM who could help on this that > > would be great. It might well be a BUG and needs to be reported as such not > > sure at this stage. > > > > If any of the above is not entirely clear please let me know and I will try > > my best to explain in more detail. > > > > Thanks > > Raf > > > > > -- > > Andrija Panić >
