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c-user: Add TAS and TTAS terms

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This commit is contained in:
Sebastian Huber 2017-02-03 11:55:29 +01:00
parent 87b4d03b35
commit 90a3c414ce
2 changed files with 8 additions and 2 deletions
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6
c-user/glossary.rst
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@ -668,6 +668,9 @@ Glossary
target
The system on which the application will ultimately execute.
TAS
An acronym for Test-And-Set.
task
thread
A logically complete thread of execution. It consists normally of a set
@ -741,6 +744,9 @@ Glossary
missed. Rate Monotonic Scheduling can be used to determine if all
deadlines will be met under transient overload.
TTAS
An acronym for Test and Test-And-Set.
user extensions
Software routines provided by the application to enhance the
functionality of RTEMS.

4
c-user/symmetric_multiprocessing_services.rst
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@ -643,8 +643,8 @@ variables,
Updates of the heir thread are done via a normal store operation. The thread
dispatch necessary indicator of another processor is set as a side-effect of an
inter-processor interrupt. So, this change notification works without the use
of locks. The thread context is protected by a TTAS lock embedded in the
context to ensure that it is used on at most one processor at a time.
of locks. The thread context is protected by a :term:`TTAS` lock embedded in
the context to ensure that it is used on at most one processor at a time.
Normally, only thread-specific or per-processor locks are used during a thread
dispatch. This implementation turned out to be quite efficient and no lock
contention was observed in the testsuite. The heavy-weight thread dispatch