netdev - Re: [PATCH net-next v14 0/5] ethtool: provide the dim profile fine-tuning channel

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Date: Sat, 8 Jun 2024 12:17:46 +0800
From: Heng Qi <hengqi@...ux.alibaba.com>
To: netdev@...r.kernel.org, virtualization@...ts.linux.dev,
 Jakub Kicinski <kuba@...nel.org>
Cc: "David S . Miller" <davem@...emloft.net>, Paolo Abeni
 <pabeni@...hat.com>, Eric Dumazet <edumazet@...gle.com>,
 Jason Wang <jasowang@...hat.com>, "Michael S . Tsirkin" <mst@...hat.com>,
 Brett Creeley <bcreeley@....com>, Ratheesh Kannoth <rkannoth@...vell.com>,
 Alexander Lobakin <aleksander.lobakin@...el.com>,
 Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, Tal Gilboa <talgi@...dia.com>,
 Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
 Maxime Chevallier <maxime.chevallier@...tlin.com>,
 Jiri Pirko <jiri@...nulli.us>, Paul Greenwalt <paul.greenwalt@...el.com>,
 Ahmed Zaki <ahmed.zaki@...el.com>, Vladimir Oltean
 <vladimir.oltean@....com>, Kory Maincent <kory.maincent@...tlin.com>,
 Andrew Lunn <andrew@...n.ch>, justinstitt@...gle.com,
 donald.hunter@...il.com, Eugenio Pérez
 <eperezma@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>,
 Dragos Tatulea <dtatulea@...dia.com>,
 Rahul Rameshbabu <rrameshbabu@...dia.com>,
 Heiner Kallweit <hkallweit1@...il.com>,
 Przemek Kitszel <przemyslaw.kitszel@...el.com>,
 awel Dembicki <paweldembicki@...il.com>
Subject: Re: [PATCH net-next v14 0/5] ethtool: provide the dim profile
 fine-tuning channel

Gentle ping.

Thanks.

在 2024/6/3 下午11:47, Heng Qi 写道:
> The NetDIM library provides excellent acceleration for many modern
> network cards. However, the default profiles of DIM limits its maximum
> capabilities for different NICs, so providing a way which the NIC can
> be custom configured is necessary.
>
> Currently, the way is based on the commonly used "ethtool -C".
>
> Please review, thank you very much!
>
> Changelog
> =====
> v13->v14:
>    - Make DIMLIB dependent on NET (patch 2/5).
>
> v12->v13:
>    - Rebase net-next to fix the one-line conflict.
>    - Update tiny comments.
>    - Config ETHTOOL_NETLINK to select DIMLIB.
>
> v11->v12:
>    - Remove the use of IS_ENABLED(DIMLIB).
>    - Update Simon's htmldoc hint.
>
> v10->v11:
>    - Fix and clean up some issues from Kuba, thanks.
>    - Rebase net-next/main
>
> v9->v10:
>    - Collect dim related flags/mode/work into one place.
>    - Use rx_profile + tx_profile instead of four profiles.
>    - Add several helps.
>    - Update commit logs.
>
> v8->v9:
>    - Fix the compilation error of conflicting names of rx_profile in
>      dim.h and ice driver: in dim.h, rx_profile is replaced with
>      dim_rx_profile. So does tx_profile.
>
> v7->v8:
>    - Use kmemdup() instead of kzalloc()/memcpy() in dev_dim_profile_init().
>
> v6->v7:
>    - A new wrapper struct pointer is used in struct net_device.
>    - Add IS_ENABLED(CONFIG_DIMLIB) to avoid compiler warnings.
>    - Profile fields changed from u16 to u32.
>
> v5->v6:
>    - Place the profile in netdevice to bypass the driver.
>      The interaction code of ethtool <-> kernel has not changed at all,
>      only the interaction part of kernel <-> driver has changed.
>
> v4->v5:
>    - Update some snippets from Kuba.
>
> v3->v4:
>    - Some tiny updates and patch 1 only add a new comment.
>
> v2->v3:
>    - Break up the attributes to avoid the use of raw c structs.
>    - Use per-device profile instead of global profile in the driver.
>
> v1->v2:
>    - Use ethtool tool instead of net-sysfs.
>
> Heng Qi (5):
>    linux/dim: move useful macros to .h file
>    dim: make DIMLIB dependent on NET
>    ethtool: provide customized dim profile management
>    dim: add new interfaces for initialization and getting results
>    virtio-net: support dim profile fine-tuning
>
>   Documentation/netlink/specs/ethtool.yaml     |  31 +++
>   Documentation/networking/ethtool-netlink.rst |   4 +
>   Documentation/networking/net_dim.rst         |  42 +++
>   drivers/net/virtio_net.c                     |  54 +++-
>   drivers/soc/fsl/Kconfig                      |   2 +-
>   include/linux/dim.h                          | 113 ++++++++
>   include/linux/ethtool.h                      |   4 +-
>   include/linux/netdevice.h                    |   3 +
>   include/uapi/linux/ethtool_netlink.h         |  22 ++
>   lib/Kconfig                                  |   1 +
>   lib/dim/net_dim.c                            | 144 +++++++++-
>   net/Kconfig                                  |   1 +
>   net/ethtool/coalesce.c                       | 263 ++++++++++++++++++-
>   13 files changed, 667 insertions(+), 17 deletions(-)
>