score: Introduce CPU budget operations

This patch set replaces the CPU budget algorithm enumeration with a set of CPU
budget operations which implement a particular CPU budget algorithm.  This
helps to hide the CPU budget algorithm implementation details from the general
thread handling.  The CPU budget callouts are turned into CPU budget
operations.  This slightly reduces the size of the thread control block.

All schedulers used the default scheduler tick implementation.  The tick
scheduler operation is removed and the CPU budget operations are directly used
in _Watchdog_Tick() if the executing thread uses a CPU budget algorithm.  This
is performance improvement for all threads which do not use a CPU budget
algorithm (default behaviour).

1 files changed, 0 insertions, 38 deletions

diff --git a/cpukit/include/rtems/score/schedulerimpl.h b/cpukit/include/rtems/score/schedulerimpl.h
index 50110ea6e7..2c53c05056 100644
--- a/cpukit/include/rtems/score/schedulerimpl.h
+++ b/cpukit/include/rtems/score/schedulerimpl.h
@@ -600,44 +600,6 @@ RTEMS_INLINE_ROUTINE void _Scheduler_Cancel_job(
 }
 
 /**
- * @brief Scheduler method invoked at each clock tick.
- *
- * This method is invoked at each clock tick to allow the scheduler
- * implementation to perform any activities required.  For the
- * scheduler which support standard RTEMS features, this includes
- * time-slicing management.
- *
- * @param cpu The cpu control for the operation.
- */
-RTEMS_INLINE_ROUTINE void _Scheduler_Tick( const Per_CPU_Control *cpu )
-{
-  const Scheduler_Control *scheduler;
-  Thread_Control          *executing;
-
-  scheduler = _Scheduler_Get_by_CPU( cpu );
-
-#if defined(RTEMS_SMP)
-  if ( scheduler == NULL ) {
-    /*
-     * In SMP configurations, processors may be removed/added at runtime
-     * from/to a scheduler.  There may be still clock interrupts on currently
-     * unassigned processors.
-     */
-    return;
-  }
-#endif
-
-  /*
-   * Each online processor has at least an idle thread as the executing thread
-   * even in case it has currently no scheduler assigned.  Clock interrupts on
-   * processors which are not online would be a severe bug of the Clock Driver.
-   */
-  executing = _Per_CPU_Get_executing( cpu );
-  _Assert( executing != NULL );
-  ( *scheduler->Operations.tick )( scheduler, executing );
-}
-
-/**
  * @brief Starts the idle thread for a particular processor.
  *
  * @param scheduler The scheduler instance.