Re: [Qemu-devel] [RFC PATCH 0/8] virtio-net 1.1 userspace backend support

[Jason Wang]

On 2018年04月04日 20:53, address@hidden wrote:
> From: Wei Xu <address@hidden>
>
> This is a prototype for virtio-net 1.1 support in userspace backend,
> only minimum part are included in this RFC(roughly synced to v8 as
> Jason and Tiwei's RFC).
>
> Test has been done together with Tiwei's RFC guest virtio-net driver
> patch, ping and a quick iperf test successfully.
>
> Issues:
> 1. Rx performance of Iperf is much slower than TX.
>      TX: 13-15Gb
>      RX: 100-300Mb

This needs to be investigated. What's the pps of TX/RX then? (Maybe you 
can try Jen's dpdk code too).

Thanks

> Missing:
> - device and driver
> - indirect descriptor
> - migration
> - vIOMMU support
> - other revisions since v8
> - see FIXME
>
> Wei Xu (8):
>    virtio: feature bit, data structure for packed ring
>    virtio: memory cache for packed ring
>    virtio: add empty check for packed ring
>    virtio: add detach element for packed ring(1.1)
>    virtio: notification tweak for packed ring
>    virtio: flush/push support for packed ring
>    virtio: get avail bytes check for packed ring
>    virtio: queue pop support for packed ring
>
>   hw/virtio/virtio.c                             | 618 +++++++++++++++++++++++--
>   include/hw/virtio/virtio.h                     |  12 +-
>   include/standard-headers/linux/virtio_config.h |   2 +
>   3 files changed, 601 insertions(+), 31 deletions(-)