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17103b8504
Collect the statistics of specific types of behavior in the sched_ext core, which are not easily visible but still interesting to an scx scheduler. An event type is defined in 'struct scx_event_stats.' When an event occurs, its counter is accumulated using 'scx_add_event()' and '__scx_add_event()' to per-CPU 'struct scx_event_stats' for efficiency. 'scx_bpf_events()' aggregates all the per-CPU counters and exposes a system-wide counters. For convenience and readability of the code, 'scx_agg_event()' and 'scx_dump_event()' are provided. The collected events can be observed after a BPF scheduler is unloaded beforea new BPF scheduler is loaded so the per-CPU 'struct scx_event_stats' are reset. Signed-off-by: Changwoo Min <changwoo@igalia.com> Signed-off-by: Tejun Heo <tj@kernel.org>
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 reStructuredText 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.