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Diffstat (limited to 'c-user/symmetric_multiprocessing_services.rst')
| -rw-r--r-- | c-user/symmetric_multiprocessing_services.rst | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/c-user/symmetric_multiprocessing_services.rst b/c-user/symmetric_multiprocessing_services.rst index 5ff24a3..0cdf1ef 100644 --- a/c-user/symmetric_multiprocessing_services.rst +++ b/c-user/symmetric_multiprocessing_services.rst @@ -5,6 +5,9 @@ .. COMMENT: Copyright (c) 2017 embedded brains GmbH. .. COMMENT: All rights reserved. +.. index:: Symmetric Multiprocessing +.. index:: SMP + Symmetric Multiprocessing (SMP) ******************************* @@ -124,11 +127,12 @@ when a task switch occurred at just the wrong moment. Now there are N-1 tasks executing in parallel all the time and this results in many more opportunities for small windows in critical sections to be hit. -Task Affinity -------------- .. index:: task affinity .. index:: thread affinity +Task Affinity +------------- + RTEMS provides services to manipulate the affinity of a task. Affinity is used to specify the subset of processors in an SMP system on which a particular task can execute. @@ -144,11 +148,12 @@ not support affinity, it is likely to ignore all attempts to set affinity. The scheduler with support for arbitary processor affinities uses a proof of concept implementation. See https://devel.rtems.org/ticket/2510. -Task Migration --------------- .. index:: task migration .. index:: thread migration +Task Migration +-------------- + With more than one processor in the system tasks can migrate from one processor to another. There are four reasons why tasks migrate in RTEMS. |