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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2014-04-09 15:07:54 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2014-04-15 10:41:44 +0200 |
| commit | c5831a3f9af11228dbdaabaf01f69d37e55684ef (patch) | |
| tree | e9ddedd942f3f31d239820dfc4dbcef4cde0b09a /cpukit/rtems | |
| parent | rtems: Add task get/set scheduler (diff) | |
| download | rtems-c5831a3f9af11228dbdaabaf01f69d37e55684ef.tar.bz2 | |
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.
Diffstat (limited to 'cpukit/rtems')
| -rw-r--r-- | cpukit/rtems/src/clocktick.c | 2 | ||||
| -rw-r--r-- | cpukit/rtems/src/taskcreate.c | 2 | ||||
| -rw-r--r-- | cpukit/rtems/src/tasksetaffinity.c | 1 |
3 files changed, 3 insertions, 2 deletions
diff --git a/cpukit/rtems/src/clocktick.c b/cpukit/rtems/src/clocktick.c index 1abaa7f20e..a026b44494 100644 --- a/cpukit/rtems/src/clocktick.c +++ b/cpukit/rtems/src/clocktick.c @@ -34,7 +34,7 @@ rtems_status_code rtems_clock_tick( void ) _Watchdog_Tickle_ticks(); - _Scheduler_Tick( _Scheduler_Get( NULL ) ); + _Scheduler_Tick(); #if defined( RTEMS_SMP ) _Thread_Enable_dispatch(); diff --git a/cpukit/rtems/src/taskcreate.c b/cpukit/rtems/src/taskcreate.c index 35dd37c4e5..65a8d33ff1 100644 --- a/cpukit/rtems/src/taskcreate.c +++ b/cpukit/rtems/src/taskcreate.c @@ -23,6 +23,7 @@ #include <rtems/rtems/modesimpl.h> #include <rtems/rtems/support.h> #include <rtems/score/apimutex.h> +#include <rtems/score/schedulerimpl.h> #include <rtems/score/sysstate.h> #include <rtems/score/threadimpl.h> @@ -140,6 +141,7 @@ rtems_status_code rtems_task_create( status = _Thread_Initialize( &_RTEMS_tasks_Information, the_thread, + _Scheduler_Get_by_CPU_index( _SMP_Get_current_processor() ), NULL, stack_size, is_fp, diff --git a/cpukit/rtems/src/tasksetaffinity.c b/cpukit/rtems/src/tasksetaffinity.c index 6d8def7aca..3294f97639 100644 --- a/cpukit/rtems/src/tasksetaffinity.c +++ b/cpukit/rtems/src/tasksetaffinity.c @@ -43,7 +43,6 @@ rtems_status_code rtems_task_set_affinity( case OBJECTS_LOCAL: ok = _Scheduler_Set_affinity( - _Scheduler_Get( the_thread ), the_thread, cpusetsize, cpuset |