[dpdk-dev] [RFC 0/7] PMD driver for AF_XDP

Qi Zhang qi.z.zhang at intel.com
Tue Feb 27 10:35:47 CET 2018


The RFC patches add a new PMD driver for AF_XDP which is a proposed
faster version of AF_PACKET interface in Linux, see below link for 
detail AF_XDP introduction:
https://fosdem.org/2018/schedule/event/af_xdp/
https://lwn.net/Articles/745934/

This patchset is base on v18.02.
It also require a linux kernel that have below AF_XDP RFC patches be
applied.
https://patchwork.ozlabs.org/patch/867961/
https://patchwork.ozlabs.org/patch/867960/
https://patchwork.ozlabs.org/patch/867938/
https://patchwork.ozlabs.org/patch/867939/
https://patchwork.ozlabs.org/patch/867940/
https://patchwork.ozlabs.org/patch/867941/
https://patchwork.ozlabs.org/patch/867942/
https://patchwork.ozlabs.org/patch/867943/
https://patchwork.ozlabs.org/patch/867944/
https://patchwork.ozlabs.org/patch/867945/
https://patchwork.ozlabs.org/patch/867946/
https://patchwork.ozlabs.org/patch/867947/
https://patchwork.ozlabs.org/patch/867948/
https://patchwork.ozlabs.org/patch/867949/
https://patchwork.ozlabs.org/patch/867950/
https://patchwork.ozlabs.org/patch/867951/
https://patchwork.ozlabs.org/patch/867952/
https://patchwork.ozlabs.org/patch/867953/
https://patchwork.ozlabs.org/patch/867954/
https://patchwork.ozlabs.org/patch/867955/
https://patchwork.ozlabs.org/patch/867956/
https://patchwork.ozlabs.org/patch/867957/
https://patchwork.ozlabs.org/patch/867958/
https://patchwork.ozlabs.org/patch/867959/

There is no clean upstream target yet since kernel patch is still in
RFC stage, The purpose of the patchset is just for anyone that want to
eveluate af_xdp with DPDK application and get feedback for further
improvement.

To try with the new PMD
1. compile and install the kernel with above patches applied.
2. configure $LINUX_HEADER_DIR (dir of "make headers_install")
   and $TOOLS_DIR (dir at <kernel_src>/tools) at driver/net/af_xdp/Makefile
   before compile DPDK.
3. make sure libelf and libbpf is installed.

BTW, performance test shows our PMD can reach 94%~98% of the orignal benchmark
when share memory is enabled.

Qi Zhang (7):
  net/af_xdp: new PMD driver
  lib/mbuf: enable parse flags when create mempool
  lib/mempool: allow page size aligned mempool
  net/af_xdp: use mbuf mempool for buffer management
  net/af_xdp: enable share mempool
  net/af_xdp: load BPF file
  app/testpmd: enable parameter for mempool flags

 app/test-pmd/parameters.c                     |  12 +
 app/test-pmd/testpmd.c                        |  15 +-
 app/test-pmd/testpmd.h                        |   1 +
 config/common_base                            |   5 +
 config/common_linuxapp                        |   1 +
 drivers/net/Makefile                          |   1 +
 drivers/net/af_xdp/Makefile                   |  60 ++
 drivers/net/af_xdp/bpf_load.c                 | 798 +++++++++++++++++++++++
 drivers/net/af_xdp/bpf_load.h                 |  65 ++
 drivers/net/af_xdp/libbpf.h                   | 199 ++++++
 drivers/net/af_xdp/meson.build                |   7 +
 drivers/net/af_xdp/rte_eth_af_xdp.c           | 878 ++++++++++++++++++++++++++
 drivers/net/af_xdp/rte_pmd_af_xdp_version.map |   4 +
 drivers/net/af_xdp/xdpsock_queue.h            |  62 ++
 lib/librte_mbuf/rte_mbuf.c                    |  15 +-
 lib/librte_mbuf/rte_mbuf.h                    |   8 +-
 lib/librte_mempool/rte_mempool.c              |   2 +
 lib/librte_mempool/rte_mempool.h              |   1 +
 mk/rte.app.mk                                 |   1 +
 19 files changed, 2125 insertions(+), 10 deletions(-)
 create mode 100644 drivers/net/af_xdp/Makefile
 create mode 100644 drivers/net/af_xdp/bpf_load.c
 create mode 100644 drivers/net/af_xdp/bpf_load.h
 create mode 100644 drivers/net/af_xdp/libbpf.h
 create mode 100644 drivers/net/af_xdp/meson.build
 create mode 100644 drivers/net/af_xdp/rte_eth_af_xdp.c
 create mode 100644 drivers/net/af_xdp/rte_pmd_af_xdp_version.map
 create mode 100644 drivers/net/af_xdp/xdpsock_queue.h

-- 
2.13.6



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