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". For example, on the server side, the virtio-net NIC with rx dim enabled has 8 queues and runs nginx. The client uses the following command to send traffic to the server: ./wrk http://server_ip:80 -c 64 -t 5 -d 30 Then adjust the default rx-profile for server dim to {.usec = 1, .pkts = 256, .comps = n/a,}, {.usec = 8, .pkts = 256, .comps = n/a,}, {.usec = 30, .pkts = 256, .comps = n/a,}, {.usec = 64, .pkts = 256, .comps = n/a,}, {.usec = 128, .pkts = 256, .comps = n/a,} The server PPS is improved by 20%+. Please review, thank you very much! Changelog ===== v14->v15: - Modify the mod bit and add some hints. Jakub feedback: Use RESEND to refresh the review queue. 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 | 8 + 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 | 273 ++++++++++++++++++- 13 files changed, 681 insertions(+), 17 deletions(-) -- 2.32.0.3.g01195cf9f
