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Tony Nguyen says: ==================== 10GbE Intel Wired LAN Driver Updates 2021-12-28 Alexander Lobakin says: napi_build_skb() I introduced earlier this year ([0]) aims to decrease MM pressure and the overhead from in-place kmem_cache_alloc() on each Rx entry processing by decaching skbuff_heads from NAPI per-cpu cache filled prior to that by napi_consume_skb() (so it is sort of a direct shortcut for free -> mm -> alloc cycle). Currently, no in-tree drivers use it. Switch all Intel Ethernet drivers to it to get slight-to-medium perf boosts depending on the frame size. ice driver, 50 Gbps link, pktgen + XDP_PASS (local in) sample: frame_size/nthreads 64/42 128/20 256/8 512/4 1024/2 1532/1 net-next (Kpps) 46062 34654 18248 9830 5343 2714 series 47438 34708 18330 9875 5435 2777 increase 2.9% 0.15% 0.45% 0.46% 1.72% 2.32% Additionally, e1000's been switched to napi_consume_skb() as it's safe and works fine there, and there's no point in napi_build_skb() without paired NAPI cache feeding point. [0] https://lore.kernel.org/all/20210213141021.87840-1-alobakin@pm.me * '10GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue: ixgbevf: switch to napi_build_skb() ixgbe: switch to napi_build_skb() igc: switch to napi_build_skb() igb: switch to napi_build_skb() ice: switch to napi_build_skb() iavf: switch to napi_build_skb() i40e: switch to napi_build_skb() e1000: switch to napi_build_skb() e1000: switch to napi_consume_skb() ==================== Link: https://lore.kernel.org/r/20211228175815.281449-1-anthony.l.nguyen@intel.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.