Re: [Users] VirtIO disk latency

On Jan 9, 2014, at 3:16 AM, Markus Stockhausen <stockhausen@collogia.de> wrote:

We see a quite a heavy latency penalty using KVM VirtIO disks in comparison to ESX. Doing one I/O onto disk inside a VM usually adds 370us of overhead in the virtualisation layer. This has been tested with VirtIO-SCSI and windows guest (2K3). More here (still now answer yet):

It would be interesting to see you do the same tests on virtio-blk instead of virtio-scsi.