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Ido Schimmel says: ==================== mlxsw: Implement sampling using mirroring So far, sampling was implemented using a dedicated sampling mechanism that is available on all Spectrum ASICs. Spectrum-2 and later ASICs support sampling by mirroring packets to the CPU port with probability. This method has a couple of advantages compared to the legacy method: * Extra metadata per-packet: Egress port, egress traffic class, traffic class occupancy and end-to-end latency * Ability to sample packets on egress / per-flow as opposed to only ingress This series should not result in any user-visible changes and its aim is to convert Spectrum-2 and later ASICs to perform sampling by mirroring to the CPU port with probability. Future submissions will expose the additional metadata and enable sampling using more triggers (e.g., egress). Series overview: Patches #1-#3 extend the SPAN (mirroring) module to accept new parameters required for sampling. See individual commit messages for detailed explanation. Patch #4-#5 split sampling support between Spectrum-1 and later ASIC while still using the legacy method for all ASIC generations. Patch #6 converts Spectrum-2 and later ASICs to perform sampling by mirroring to the CPU port with probability. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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.