[PATCH] c-user: Add scheduler glossary terms
sebastian.huber at embedded-brains.de
Mon Apr 12 09:30:24 UTC 2021
Add glossary terms which characterize the relationship of a scheduler to
c-user/glossary.rst | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/c-user/glossary.rst b/c-user/glossary.rst
index 4e375de..fe9ad4a 100644
@@ -17,6 +17,10 @@ Glossary
A term used to describe an object which has been created by an
+ alien scheduler
+ An alien scheduler of a :term:`task` is a :term:`scheduler` which is not an
+ :term:`eligible scheduler`.
This term is an acronym for Arbitrary Processor Affinity. APA schedulers
allow a thread to have an arbitrary affinity to a processor set, rather than
@@ -240,6 +244,10 @@ Glossary
This term is an acronym for
`Executable and Linkable Format <https://en.wikipedia.org/wiki/Executable_and_Linkable_Format>`_.
+ eligible scheduler
+ An eligible scheduler of a :term:`task` is a :term:`scheduler` which can be
+ used by the task to allocate a processor for the task.
An application that is delivered as a hidden part of a larger system.
For example, the software in a fuel-injection control system is an
@@ -340,9 +348,20 @@ Glossary
dispatch is marked as necessary, then the next thread dispatch will make
the heir task the executing task.
+ helping scheduler
+ A helping scheduler of a :term:`task` is a :term:`scheduler` which is a
+ :term:`eligible scheduler` and which is not the :term:`home scheduler` of
+ the task.
A multiprocessor computer system composed of dissimilar processors.
+ home scheduler
+ The home scheduler of a :term:`task` is a :term:`scheduler` which is a
+ :term:`eligible scheduler` and which is assigned to the task during the
+ initialization or explicitly via a directive call such as
A multiprocessor computer system composed of a single type of processor.
@@ -728,6 +747,9 @@ Glossary
priority number and assign the tasks with the lowest priority number to
one processor of the set of processors owned by a scheduler instance.
+ A scheduler can be a :term:`home scheduler`, a :term:`helping scheduler`,
+ an :term:`eligible scheduler`, and an :term:`alien scheduler` for a task.
A scheduler instance is a scheduling algorithm with a corresponding
context to store its internal state. Each processor in the system is
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