On Thu, Dec 1, 2022 at 1:36 AM Gianluca Cecchi <gianluca.cec...@gmail.com> wrote: > > On Wed, Nov 30, 2022 at 11:52 AM Volenbovskyi, Konstantin > <konstantin.volenbovs...@haufe.com> wrote: >> >> Hi, >> >> Not a direct answer – but I think something to consider: >> >> >> >> -I am not sure what virtio is there ‘out of box’, but I imagine that you >> need to check what is latest virtio-win package >> >> containing NetKVM driver. >> >> (https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/archive-virtio/ >> ?) >> >> -I would imagine that main driver of higher virtio-net performance is >> support and use of multiqueue. >> >> I don’t know about Windows 2019 , maybe it is matter of configuration. >> >> >> >> Check out https://access.redhat.com/solutions/6638561 and >> https://github.com/virtio-win/kvm-guest-drivers-windows/issues/237 >> >> >> >> BR, >> >> Konstantin >> >> > > > Thanks for your input, Konstantin. > Some more context. > Vm was migrated from vSphere (using an external provider via network). > The VM has an application that communicates with an Oracle System on a second > server (VM) running Linux. > With the Windows VM on vSphere, with vmxnet3 driver, the network performance > of the application was about 5Gbs. > The Linux server is a VM on oVirt infra. > The reason to move the Windows VM to oVirt is to investigate if it can get > better performance. > But after the migration test it seems that the application network > performance is about 2Gbs, so far worse than on vSphere. > > After these application results above, some bare tests with iperf3 were done. > On oVirt Linux -> Linux with VMs on two different hypervisors network > performance is more than 9Gbs > Windows -> Linux on same hypervisor 2Gbs > Windows -> Linux on different hypervisor 1.5Gbs > Linux -> Windows almost 10Gbs > > As suggested from the links you provided I tried iperf2, using EPEL iperf rpm > for Linux VM and sourceforge iperf-2.1.8-win.exe for Windows. > With VMs on different hosts and transferring from Windows to Linux I got > 9.3Gbs > So the problem is not the driver itself or VM configuration but probably the > "legacy" application doesn't support multiqueue or any network performance > optimizations that are available in the driver.
If the fault is on the "legacy" application, how can it achieve 5Gbs on vSphere? Best regards, -- Didi _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-le...@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/OEOW37KFPUUUNCUZKIBJNPRZSO7JDCQ5/
