Sorry, add missing loopback performance comparison.
+---------+----------+----------------+----------------+
|Loopback |1 Queue |2 Queues |4 Queues |
+---------+----------+----------------+----------------+
|Inorder |6.2Mpps |9.5 ~ 11.9Mpps |10.6 ~ 11.3Mpps |
+---------+----------+----------------+----------------+
|Normal |7.5Mpps |7.7 ~ 9.0Mpps |7.6 ~ 7.8Mpps |
+---------+----------+----------------+----------------+
Thanks,
Marvin
> -----Original Message-----
> From: Liu, Yong
> Sent: Friday, June 08, 2018 5:07 PM
> To: maxime.coque...@redhat.com; Bie, Tiwei <tiwei....@intel.com>
> Cc: Wang, Zhihong <zhihong.w...@intel.com>; dev@dpdk.org; Liu, Yong
> <yong....@intel.com>
> Subject: [PATCH 0/7] support VIRTIO_F_IN_ORDER feature
>
> In latest virtio-spec, new feature bit VIRTIO_F_IN_ORDER was introduced.
> When this feature has been negotiated, virtio driver will use
> descriptors in ring order: starting from offset 0 in the table, and
> wrapping around at the end of the table. Vhost devices will always use
> descriptors in the same order in which they have been made available.
> This can simplify vhost and device code as desc/used/avail ring are
> using same index.
>
> Based on updated virtio-spec, this series realized IN_ORDER prototype
> in virtio driver. Due to new [RT]x path added into selection, also add
> two new parameters mrg_rx and in_order into virtio-user vdev parameters
> list. This will allow user to configure feature bits thus can impact
> [RT]x path selection.
>
> IN_ORDER can improve virtio/vhost performance. This patch implement
> virtio driver part only, we can see significant gain there. As a result
> it impacts vhost performance a little since there’s no dedicated Rx/Tx
> implementation on vhost side. This can be added in another patch later.
>
> Performance of virtio user with IN_ORDER feature:
>
> Platform: Purely
> CPU: Intel(R) Xeon(R) Platinum 8160 CPU @ 2.10GHz
> DPDK baseline: 18.05
> Setup: testpmd with vhost vdev + testpmd with virtio vdev
>
> +--------------+----------+----------+---------+
> |Vhost->Virtio |1 Queue |2 Queues |4 Queues |
> +--------------+----------+----------+---------+
> |Inorder |12.9Mpps |25.4Mpps |31.6Mpps |
> |Normal |12.1Mpps |18.5Mpps |18.9Mpps |
> +--------------+----------+----------+---------+
>
> +--------------+----------+----------------+---------+
> |Virtio->Vhost |1 Queue |2 Queues |4 Queues |
> +--------------+----------+----------------+---------+
> |Inorder |16.4Mpps |11.9 ~ 19.5Mpps |11.8Mpps |
> |Normal |13.3Mpps |9.8 ~ 14Mpps |10.5Mpps |
> +--------------+----------+----------------+---------+
>
> +---------+----------+----------------+----------------+
> |Loopback |1 Queue |2 Queues |4 Queues |
> +---------+----------+----------------+----------------+
> |Inorder |6.2Mpps |9.5 ~ 11.9Mpps |10.6 ~ 11.3Mpps |
> +---------+----------+----------------+----------------+
>
> Marvin Liu (7):
> vhost: announce VIRTIO_F_IN_ORDER support
> net/virtio: add VIRTIO_F_IN_ORDER definition
> net/virtio-user: add mgr_rxbuf and in_order vdev parameters
> net/virtio: free IN_ORDER descriptors
> net/virtio: support IN_ORDER Rx and Tx
> net/virtio: add IN_ORDER Rx/Tx into selection
> net/virtio: annouce VIRTIO_F_IN_ORDER support
>
> drivers/net/virtio/virtio_ethdev.c | 31 +-
> drivers/net/virtio/virtio_ethdev.h | 7 +
> drivers/net/virtio/virtio_pci.h | 8 +
> drivers/net/virtio/virtio_rxtx.c | 618 ++++++++++++++++--
> .../net/virtio/virtio_user/virtio_user_dev.c | 10 +-
> .../net/virtio/virtio_user/virtio_user_dev.h | 3 +-
> drivers/net/virtio/virtio_user_ethdev.c | 33 +-
> drivers/net/virtio/virtqueue.c | 8 +
> drivers/net/virtio/virtqueue.h | 2 +
> lib/librte_vhost/socket.c | 4 +
> lib/librte_vhost/vhost.h | 10 +-
> 11 files changed, 668 insertions(+), 66 deletions(-)
>
> --
> 2.17.0
