Re: [Qemu-devel] [virtio-dev] [PATCH v3 0/7] Vhost-pci for inter-VM communication

[Jason Wang <jasowang@redhat.com>]

On 2017年12月05日 11:33, Wei Wang wrote:
> Vhost-pci is a point-to-point based inter-VM communication solution. This
> patch series implements the vhost-pci-net device setup and emulation. The
> device is implemented as a virtio device, and it is set up via the
> vhost-user protocol to get the neessary info (e.g the memory info of the
> remote VM, vring info).
>
> Currently, only the fundamental functions are implemented. More features,
> such as MQ and live migration, will be updated in the future.
>
> The DPDK PMD of vhost-pci has been posted to the dpdk mailinglist here:
> http://dpdk.org/ml/archives/dev/2017-November/082615.html
>
> v2->v3 changes:
> 1) static device creation: instead of creating and hot-plugging the
>     device when receiving a vhost-user msg, the device is not created
>     via the qemu booting command line.
> 2) remove vqs: rq and ctrlq are removed in this version.
>      - receive vq: the receive vq is not needed anymore. The PMD directly
>                    shares the remote txq and rxq - grab from remote txq to
>                    receive packets, and put to rxq to send packets.
>      - ctrlq: the ctrlq is replaced by the first 4KB metadata area of the
>               device Bar-2.
> 3) simpler implementation: the entire implementation has been tailored
>     from ~1800 LOC to ~850 LOC.

Hi:

Any performance numbers you can share?

Thanks