From: "Michael S. Tsirkin" <mst@redhat•com>
To: Yunjian Wang <wangyunjian@huawei•com>
Cc: willemdebruijn.kernel@gmail•com, jasowang@redhat•com,
kuba@kernel•org, bjorn@kernel•org, magnus.karlsson@intel•com,
maciej.fijalkowski@intel•com, jonathan.lemon@gmail•com,
davem@davemloft•net, bpf@vger•kernel.org, netdev@vger•kernel.org,
linux-kernel@vger•kernel.org, kvm@vger•kernel.org,
virtualization@lists•linux.dev, xudingke@huawei•com,
liwei395@huawei•com
Subject: Re: [PATCH net-next v2 0/3] tun: AF_XDP Tx zero-copy support
Date: Wed, 28 Feb 2024 13:31:00 -0500 [thread overview]
Message-ID: <20240228133035-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <1709118281-125508-1-git-send-email-wangyunjian@huawei.com>
On Wed, Feb 28, 2024 at 07:04:41PM +0800, Yunjian Wang 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 broken pls repost.
vhost bits look ok though:
Acked-by: Michael S. Tsirkin <mst@redhat•com>
> 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
prev parent reply other threads:[~2024-02-28 18:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-28 11:04 [PATCH net-next v2 0/3] tun: AF_XDP Tx zero-copy support Yunjian Wang
2024-02-28 12:36 ` Jiri Pirko
2024-02-28 18:31 ` Michael S. Tsirkin [this message]
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