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| Filename | Latest commit message | Latest commit date |
|---|---|---|
a729b7f0bd
This commit adds configurable overhead compensation support to the rate shaper. With this feature, userspace can configure the actual bottleneck link overhead and encapsulation mode used, which will be used by the shaper to calculate the precise duration of each packet on the wire. This feature is needed because CAKE is often deployed one or two hops upstream of the actual bottleneck (which can be, e.g., inside a DSL or cable modem). In this case, the link layer characteristics and overhead reported by the kernel does not match the actual bottleneck. Being able to set the actual values in use makes it possible to configure the shaper rate much closer to the actual bottleneck rate (our experience shows it is possible to get with 0.1% of the actual physical bottleneck rate), thus keeping latency low without sacrificing bandwidth. The overhead compensation has three tunables: A fixed per-packet overhead size (which, if set, will be accounted from the IP packet header), a minimum packet size (MPU) and a framing mode supporting either ATM or PTM framing. We include a set of common keywords in TC to help users configure the right parameters. If no overhead value is set, the value reported by the kernel is used. Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk> Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.