Re: [dpdk-dev] [PATCH v3 0/2] Enhance Async Enqueue for Small Packets

["Wang, Yinan" <yinan.wang@intel.com>]

Tested-by: Wang, Yinan <yinan.wang@intel.com>

> -----Original Message-----
> From: Hu, Jiayu <jiayu.hu@intel.com>
> Sent: 2020?12?25? 16:29
> To: dev@dpdk.org
> Cc: maxime.coquelin@redhat.com; Xia, Chenbo <chenbo.xia@intel.com>;
> Jiang, Cheng1 <cheng1.jiang@intel.com>; Wang, Yinan
> <yinan.wang@intel.com>; Hu, Jiayu <jiayu.hu@intel.com>
> Subject: [PATCH v3 0/2] Enhance Async Enqueue for Small Packets
> 
> Async enqueue offloads large copies to DMA devices, and small copies
> are still performed by the CPU. However, it requires users to get
> enqueue completed packets by rte_vhost_poll_enqueue_completed(), even
> if they are completed by the CPU when rte_vhost_submit_enqueue_burst()
> returns. This design incurs extra overheads of tracking completed
> pktmbufs and function calls, thus degrading performance on small packets.
> 
> The first patch cleans up async enqueue code, and the second patch
> enables rte_vhost_submit_enqueue_burst() to return completed packets.
> 
> Change log
> ==========
> v3:
> - fix incorrect ret value when DMA ring is full
> - enhance description of API declaration and programmer guide
> v2:
> - fix typo
> - rename API variables
> - update programmer guide
> 
> Jiayu Hu (2):
>   vhost: cleanup async enqueue
>   vhost: enhance async enqueue for small packets
> 
>  doc/guides/prog_guide/vhost_lib.rst |   8 +-
>  lib/librte_vhost/rte_vhost_async.h  |  32 +++--
>  lib/librte_vhost/vhost.c            |  14 +-
>  lib/librte_vhost/vhost.h            |   7 +-
>  lib/librte_vhost/vhost_user.c       |   7 +-
>  lib/librte_vhost/virtio_net.c       | 258 ++++++++++++++++++++----------------
>  6 files changed, 185 insertions(+), 141 deletions(-)
> 
> --
> 2.7.4