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Linux kernel source tree
8e4b53f60f
A huge function mlx5e_sq_xmit was split into several to achieve multiple goals: 1. Reuse the code in IPoIB. 2. Better intergrate with TLS, IPSEC, GENEVE and checksum offloads. Now it's possible to reserve space in the WQ before running eseg-based offloads, so: 2.1. It's not needed to copy cseg and eseg after mlx5e_fill_sq_frag_edge anymore. 2.2. mlx5e_txqsq_get_next_pi will be used instead of the legacy mlx5e_fill_sq_frag_edge for better code maintainability and reuse. 3. Prepare for the upcoming TX MPWQE for SKBs. It will intervene after mlx5e_sq_calc_wqe_attr to check if it's possible to use MPWQE, and the code flow will split into two paths: MPWQE and non-MPWQE. Two high-level functions are provided to send packets: * mlx5e_xmit is called by the networking stack, runs offloads and sends the packet. In one of the following patches, MPWQE support will be added to this flow. * mlx5e_sq_xmit_simple is called by the TLS offload, runs only the checksum offload and sends the packet. This change has no performance impact in TCP single stream test and XDP_TX single stream test. When compiled with a recent GCC, this change shows no visible performance impact on UDP pktgen (burst 32) single stream test either: Packet rate: 16.86 Mpps (±0.15 Mpps) -> 16.95 Mpps (±0.15 Mpps) Instructions per packet: 434 -> 429 Cycles per packet: 158 -> 160 Instructions per cycle: 2.75 -> 2.69 CPU: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz (x86_64) NIC: Mellanox ConnectX-6 Dx GCC 10.2.0 Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com> Reviewed-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@nvidia.com> |
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| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.