On Jan 9, 2014, at 3:16 AM, Markus Stockhausen <[email protected]> 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.
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