Hi, Please ignore the first patch as the formatting in it looks a little uneven. Thanks!
On Sun, Jun 21, 2020 at 2:48 PM Richi Dubey <richidu...@gmail.com> wrote: > --- > c-user/glossary.rst | 34 ++++++++++++++++++++++++++++++++++ > 1 file changed, 34 insertions(+) > > diff --git a/c-user/glossary.rst b/c-user/glossary.rst > index 86350a8..63a4728 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 +17,14 @@ 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. > + APA schedulers allow a thread to have an arbitrary affinity to a > + processor set, rather than a restricted mapping to only one > processor > + of the set or the ability to run on all processors of the set. > + > + 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 +786,20 @@ Glossary > :term:`return value` to indicate a successful operation or error > conditions. > > + Strong APA > + Strong APA is a specialization of :term:`APA`. > + Schedulers which implement strong APA recursively search for a > + processor in the :term:`thread`'s affinity set, whenever a thread > + becomes ready for execution, followed by the processors in the > + affinity set of threads that are assigned the processor 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 > + to provide a thread to processor mapping with a higher total > + priority of the threads allocated a processor. > + Similar analysis is done when a thread blocks. > + > + 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 +928,17 @@ Glossary > Message queues, regions, and semaphores have a wait queue > associated with > them. > > + Weak APA > + Weak APA is a specialization of :term:`APA`. > + It refers to Linux's push and pull implementation of APA model. > + When a :term:`thread` becomes ready for execution, it is > + allocated a processor if there is an idle processor, or if a > + processor is executing a lower priority thread in its affinity > + set. Unlike :term:`Strong APA`, no thread is migrated from its > + processor to find a thread to processor mapping. > + > + See also :cite:`Cerqueira:2014:LPA`. > + > YAML > This term is an acronym for `YAML Ain't Markup Language < > https://yaml.org/>`_. > > -- > 2.17.1 > >
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