On 2018年01月15日 15:59, Wei Wang wrote:
On 01/15/2018 02:56 PM, Jason Wang wrote:
On 2018年01月12日 18:18, Stefan Hajnoczi wrote:
I just fail understand why we can't do software defined network or
storage with exist virtio device/drivers (or are there any
shortcomings that force us to invent new infrastructure).
Existing virtio-net works with a host central vSwitch, and it has the
following disadvantages:
1) long code/data path;
2) poor scalability; and
3) host CPU sacrifice
Please show me the numbers.
Vhost-pci solves the above issues by providing a point-to-point
communication between VMs. No matter how the control path would look
like finally, the key point is that the data path is P2P between VMs.
Best,
Wei
Well, I think I've pointed out several times in the replies of previous
versions. Both vhost-pci-net and virtio-net is an ethernet device, which
is not tied to a central vswitch for sure. There're just too many
methods or tricks which can be used to build a point to point data path.
The problem is not whether or not you can build direct path between VMs
through vhost-pci, the problem is why you must do it through vhost-pci.
Thanks
