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score: Add clustered/partitioned scheduling
Clustered/partitioned scheduling helps to control the worst-case latencies in the system. The goal is to reduce the amount of shared state in the system and thus prevention of lock contention. Modern multi-processor systems tend to have several layers of data and instruction caches. With clustered/partitioned scheduling it is possible to honour the cache topology of a system and thus avoid expensive cache synchronization traffic. We have clustered scheduling in case the set of processors of a system is partitioned into non-empty pairwise-disjoint subsets. These subsets are called clusters. Clusters with a cardinality of one are partitions. Each cluster is owned by exactly one scheduler instance.
This commit is contained in:
Sebastian Huber
@@ -820,6 +820,119 @@ const rtems_libio_helper rtems_fs_init_helper =
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#if defined(RTEMS_SMP)
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const size_t _Scheduler_Count =
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RTEMS_ARRAY_SIZE( _Scheduler_Table );
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const Scheduler_Assignment _Scheduler_Assignments[] = {
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#if defined(CONFIGURE_SMP_SCHEDULER_ASSIGNMENTS)
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CONFIGURE_SMP_SCHEDULER_ASSIGNMENTS
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#else
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#define CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT \
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RTEMS_SCHEDULER_ASSIGN( \
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0, \
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RTEMS_SCHEDULER_ASSIGN_PROCESSOR_OPTIONAL \
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)
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CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 2
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 3
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 4
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 5
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 6
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 7
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 8
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 9
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 10
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 11
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 12
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 13
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 14
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 15
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 16
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 17
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 18
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 19
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 20
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 21
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 22
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 23
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 24
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 25
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 26
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 27
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 28
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 29
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 30
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 31
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#if CONFIGURE_SMP_MAXIMUM_PROCESSORS >= 32
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, CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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#undef CONFIGURE_SMP_SCHEDULER_ASSIGN_OPT
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#endif
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};
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RTEMS_STATIC_ASSERT(
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CONFIGURE_SMP_MAXIMUM_PROCESSORS
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== RTEMS_ARRAY_SIZE( _Scheduler_Assignments ),
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_Scheduler_Assignments
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);
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#endif
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#if defined(CONFIGURE_SCHEDULER_EDF)
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@@ -26,6 +26,29 @@
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#define RTEMS_SCHEDULER_CONTEXT_NAME( name ) \
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_Configuration_Scheduler_ ## name
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#if defined(RTEMS_SMP)
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/* This object doesn't exist and indicates a configuration error */
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extern const Scheduler_Control RTEMS_SCHEDULER_INVALID_INDEX;
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#define RTEMS_SCHEDULER_ASSIGN_DEFAULT \
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SCHEDULER_ASSIGN_DEFAULT
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#define RTEMS_SCHEDULER_ASSIGN_PROCESSOR_OPTIONAL \
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SCHEDULER_ASSIGN_PROCESSOR_OPTIONAL
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#define RTEMS_SCHEDULER_ASSIGN_PROCESSOR_MANDATORY \
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SCHEDULER_ASSIGN_PROCESSOR_MANDATORY
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#define RTEMS_SCHEDULER_ASSIGN( index, attr ) \
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{ \
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( index ) < RTEMS_ARRAY_SIZE( _Scheduler_Table ) ? \
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&_Scheduler_Table[ ( index ) ] : &RTEMS_SCHEDULER_INVALID_INDEX, \
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( attr ) \
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}
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#define RTEMS_SCHEDULER_ASSIGN_NO_SCHEDULER { NULL, 0 }
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#endif
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/*
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* This file should be only included in the context of <rtems/confdefs.h>.
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* Define the scheduler configuration macros only in case the corresponding
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