Wed, Feb 28, 2024 at 12:04:41PM CET, [email protected] wrote:
>Hi all:
>
>Now, some drivers support the zero-copy feature of AF_XDP sockets,
>which can significantly reduce CPU utilization for XDP programs.
>
>This patch set allows TUN to also support the AF_XDP Tx zero-copy
>feature. It is based on Linux 6.8.0+(openEuler 23.09) and has
>successfully passed Netperf and Netserver stress testing with
>multiple streams between VM A and VM B, using AF_XDP and OVS.
>
>The performance testing was performed on a Intel E5-2620 2.40GHz
>machine. Traffic were generated/send through TUN(testpmd txonly
>with AF_XDP) to VM (testpmd rxonly in guest).
>
>+------+---------+---------+---------+
>| | copy |zero-copy| speedup |
>+------+---------+---------+---------+
>| UDP | Mpps | Mpps | % |
>| 64 | 2.5 | 4.0 | 60% |
>| 512 | 2.1 | 3.6 | 71% |
>| 1024 | 1.9 | 3.3 | 73% |
>+------+---------+---------+---------+
>
>Yunjian Wang (3):
> xsk: Remove non-zero 'dma_page' check in xp_assign_dev
> vhost_net: Call peek_len when using xdp
> tun: AF_XDP Tx zero-copy support
Threading of the patchset seems to be broken. Did you by any chance send
this with "--nothread" git-send-email option?
pw seems to cope fine with this though.
>
> drivers/net/tun.c | 177 ++++++++++++++++++++++++++++++++++++++--
> drivers/vhost/net.c | 21 +++--
> include/linux/if_tun.h | 32 ++++++++
> net/xdp/xsk_buff_pool.c | 7 --
> 4 files changed, 220 insertions(+), 17 deletions(-)
>
>--
>2.41.0
>
>