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| Filename | Latest commit message | Latest commit date |
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371e4fcc9d
This commit adds a bpf kselftest, which demonstrates how percpu and shared cgroup local storage can be used for efficient lookup-free network accounting. Cgroup local storage provides generic memory area with a very efficient lookup free access. To avoid expensive atomic operations for each packet, per-cpu cgroup local storage is used. Each packet is initially charged to a per-cpu counter, and only if the counter reaches certain value (32 in this case), the charge is moved into the global atomic counter. This allows to amortize atomic operations, keeping reasonable accuracy. The test also implements a naive network traffic throttling, mostly to demonstrate the possibility of bpf cgroup--based network bandwidth control. Expected output: ./test_netcnt test_netcnt:PASS Signed-off-by: Roman Gushchin <guro@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> |
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| 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.
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.