On 17/06/2020 14:13, Richi Dubey wrote:
---
c-user/glossary.rst | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/c-user/glossary.rst b/c-user/glossary.rst
index 86350a8..1d95f26 100644
--- a/c-user/glossary.rst
+++ b/c-user/glossary.rst
@@ -1,5 +1,6 @@
.. SPDX-License-Identifier: CC-BY-SA-4.0
+.. Copyright (C) 2020 Richi Dubey (richidu...@gmail.com)
.. Copyright (C) 2017, 2019 embedded brains GmbH
(http://www.embedded-brains.de)
.. Copyright (C) 1988, 1998 On-Line Applications Research Corporation (OAR)
@@ -16,6 +17,13 @@ Glossary
A term used to describe an object which has been created by an
application.
+ APA
+ This term is an acronym for Arbitrary Processor Affinity.
+ In this model,
Model of what?
a thread is allowed to have an arbitrary affinity to
+ the processor set, rather than a global mapping from one thread to all
Maybe "a processor set"?
I would say: rather than a restricted mapping to only one processor of
the set or the ability to run on all processors of the set.
+ processors or one thread to one processor.
+ It has two variants, :term:`Weak APA` and :term:`Strong APA`.
+
aperiodic task
A task which must execute only at irregular intervals and has only a
soft
deadline.
@@ -777,6 +785,19 @@ Glossary
:term:`return value` to indicate a successful operation or error
conditions.
+ Strong APA
+ Strong APA is a specialization of :term:`APA`.
+ This variant of APA refers to a system model in which whenever a
Is it really a system model?
+ :term:`thread` becomes ready for execution, recursively the processor
+ in the thread's affinity set is checked, followed by the processor in
+ the affinity set of threads that are assigned the processor present in
+ the ready thread's affinity set. This is done to find a thread to
processor
+ mapping that does not violate the priority ordering and provide a
schedule
+ with a higher total priority of the threads scheduled.
+ Similar analysis is done when a thread finishes its execution.
Since you learn vim currently, maybe you can try to visually select this
paragraph and then type "qa".
+
+ :cite:`Cerqueira:2014:LPA`
Please use a sentence, for example "See also :cite:`Cerqueira:2014:LPA`".
+
suspend
A term used to describe a task that is not competing for the CPU
because it
has had a ``rtems_task_suspend`` directive.
@@ -905,6 +926,14 @@ Glossary
Message queues, regions, and semaphores have a wait queue associated
with
them.
+ Weak APA
+ Weak APA is a specialization of :term:`APA`.
+ This refers to Linux's pull push implementation of APA model.
push/pull or "push and pull"
+ A ready thread is scheduled when a processor in its affinity set is
idle
+ or is executing a thread which is at a lower priority.
Maybe mention that no threads are forced to migrate to find a processor.
+
+ :cite:`Cerqueira:2014:LPA`
+
YAML
This term is an acronym for `YAML Ain't Markup Language
<https://yaml.org/>`_.
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