Re: [dpdk-dev] [PATCH v3 0/3] Support UDP/IPv4 GSO

["Wang, Xiao W" <xiao.w.wang@intel.com>]

Hi,

> -----Original Message-----
> From: Hu, Jiayu
> Sent: Friday, June 22, 2018 1:54 PM
> To: dev@dpdk.org
> Cc: Wang, Xiao W <xiao.w.wang@intel.com>; Ananyev, Konstantin
> <konstantin.ananyev@intel.com>; Zhang, Yuwei1 <yuwei1.zhang@intel.com>;
> Iremonger, Bernard <bernard.iremonger@intel.com>; thomas@monjalon.net;
> Hu, Jiayu <jiayu.hu@intel.com>
> Subject: [PATCH v3 0/3] Support UDP/IPv4 GSO
> 
> With the support of UDP Fragmentation Offload (UFO) and TCP Segmentation
> Offload (TSO) in virtio, VMs can exchange large UDP and TCP packets
> exceeding MTU between each other, which can greatly reduce per-packet
> processing overheads.
> 
> When the destination of the large TCP and UDP packets is crossing
> machines, the host application needs to call two different libraries,
> GSO and IP fragmentation, to split the large packets respectively.
> However,the GSO and IP fragmentation library have quite different APIs,
> which greatly complicates the host application implementation.
> 
> To simplify application development, we propose to support UDP/IPv4
> fragmentation in the GSO library. With supporting UDP GSO, host
> applicationss can use the unified APIs to split large UDP and TCP packets.
> 
> This patchset is to support UDP/IPv4 GSO. The first patch is to provide
> UDP GSO function, the second patch is to enable UDP/IPv4 GSO in the
> testpmd checksum forwarding engine, and the last patch is to update the
> programmer guide and testpmd user guide.
> 
> Change log
> ==========
> v3:
> - replace rte_pktmbuf_mtod() with rte_pktmbuf_mtod_offset().
> - fix meson build.
> - add updates to document for better explaining how UDP GSO works.
> V2:
> - fix fragment offset calculation bug.
> - add UDP GSO description in testpmd user guide.
> - shorten the second patch name.
> 
> Jiayu Hu (3):
>   gso: support UDP/IPv4 fragmentation
>   app/testpmd: enable UDP GSO in csum engine
>   gso: update documents for UDP/IPv4 GSO
> 
>  app/test-pmd/cmdline.c                             |  5 +-
>  app/test-pmd/csumonly.c                            |  2 +
>  app/test-pmd/testpmd.c                             |  2 +-
>  .../generic_segmentation_offload_lib.rst           | 10 +++
>  doc/guides/testpmd_app_ug/testpmd_funcs.rst        |  7 ++
>  lib/librte_gso/Makefile                            |  1 +
>  lib/librte_gso/gso_common.h                        |  3 +
>  lib/librte_gso/gso_udp4.c                          | 81 ++++++++++++++++++++++
>  lib/librte_gso/gso_udp4.h                          | 42 +++++++++++
>  lib/librte_gso/meson.build                         |  2 +-
>  lib/librte_gso/rte_gso.c                           | 24 +++++--
>  lib/librte_gso/rte_gso.h                           |  6 +-
>  12 files changed, 175 insertions(+), 10 deletions(-)
>  create mode 100644 lib/librte_gso/gso_udp4.c
>  create mode 100644 lib/librte_gso/gso_udp4.h
> 
> --
> 2.7.4

Series Acked-by: Xiao Wang <xiao.w.wang@intel.com>

BRs,
Xiao