[rtems commit] score: Add priority affinity smp scheduler.
Jennifer Averett
jennifer at rtems.org
Thu Apr 3 16:13:11 UTC 2014
Module: rtems
Branch: master
Commit: 56c396ba476a48c4f2a4fdd488f704dd76dbddec
Changeset: http://git.rtems.org/rtems/commit/?id=56c396ba476a48c4f2a4fdd488f704dd76dbddec
Author: Jennifer Averett <jennifer.averett at oarcorp.com>
Date: Wed Mar 19 15:20:01 2014 -0500
score: Add priority affinity smp scheduler.
---
cpukit/score/Makefile.am | 2 +
.../rtems/score/schedulerpriorityaffinitysmp.h | 144 ++++++++++++++++++++
cpukit/score/preinstall.am | 4 +
cpukit/score/src/schedulerpriorityaffinitysmp.c | 80 +++++++++++
4 files changed, 230 insertions(+), 0 deletions(-)
diff --git a/cpukit/score/Makefile.am b/cpukit/score/Makefile.am
index a09ddc3..07cb520 100644
--- a/cpukit/score/Makefile.am
+++ b/cpukit/score/Makefile.am
@@ -109,6 +109,7 @@ endif
if HAS_SMP
include_rtems_score_HEADERS += include/rtems/score/atomic.h
include_rtems_score_HEADERS += include/rtems/score/cpustdatomic.h
+include_rtems_score_HEADERS += include/rtems/score/schedulerpriorityaffinitysmp.h
include_rtems_score_HEADERS += include/rtems/score/schedulersimplesmp.h
endif
@@ -125,6 +126,7 @@ endif
if HAS_SMP
libscore_a_SOURCES += src/profilingsmplock.c
+libscore_a_SOURCES += src/schedulerpriorityaffinitysmp.c
libscore_a_SOURCES += src/schedulerprioritysmp.c
libscore_a_SOURCES += src/schedulersimplesmp.c
libscore_a_SOURCES += src/smp.c
diff --git a/cpukit/score/include/rtems/score/schedulerpriorityaffinitysmp.h b/cpukit/score/include/rtems/score/schedulerpriorityaffinitysmp.h
new file mode 100644
index 0000000..124d0c3
--- /dev/null
+++ b/cpukit/score/include/rtems/score/schedulerpriorityaffinitysmp.h
@@ -0,0 +1,144 @@
+/**
+ * @file
+ *
+ * @ingroup ScoreSchedulerPriorityAffinitySMP
+ *
+ * @brief Deterministic Priority Affinity SMP Scheduler API
+ */
+
+/*
+ * COPYRIGHT (c) 2014.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#ifndef _RTEMS_SCORE_SCHEDULERPRIORITYAFFINITYSMP_H
+#define _RTEMS_SCORE_SCHEDULERPRIORITYAFFINITYSMP_H
+
+#include <rtems/score/scheduler.h>
+#include <rtems/score/schedulerpriority.h>
+#include <rtems/score/schedulersmp.h>
+#include <rtems/score/schedulerprioritysmp.h>
+#include <rtems/score/cpuset.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @defgroup ScoreSchedulerPriorityAffinitySMP Deterministic Priority Affinity SMP Scheduler
+ *
+ * @ingroup ScoreScheduler
+ *
+ * This is an extension of the Deterministic Priority SMP Scheduler. which
+ * is an implementation of the global fixed priority scheduler (G-FP).
+ * It adds thread to core affinity support.
+ *
+ * @note This is the first iteration of this scheduler. It currently tracks
+ * the requested affinity to exercise the Scheduler Framework but it
+ * does not honor that affinity in assigning threads to cores. This
+ * will be added in a subsequent revision.
+ * @{
+ */
+
+/**
+ * @brief Entry points for the Deterministic Priority Affinity SMP Scheduler.
+ */
+#define SCHEDULER_PRIORITY_AFFINITY_SMP_ENTRY_POINTS \
+ { \
+ _Scheduler_priority_SMP_Initialize, \
+ _Scheduler_priority_SMP_Schedule, \
+ _Scheduler_priority_SMP_Yield, \
+ _Scheduler_priority_SMP_Block, \
+ _Scheduler_priority_SMP_Enqueue_fifo, \
+ _Scheduler_priority_affinity_SMP_Allocate, \
+ _Scheduler_priority_Free, \
+ _Scheduler_priority_SMP_Update, \
+ _Scheduler_priority_SMP_Enqueue_fifo, \
+ _Scheduler_priority_SMP_Enqueue_lifo, \
+ _Scheduler_priority_SMP_Extract, \
+ _Scheduler_priority_Priority_compare, \
+ _Scheduler_default_Release_job, \
+ _Scheduler_default_Tick, \
+ _Scheduler_priority_SMP_Start_idle, \
+ _Scheduler_priority_affinity_SMP_Get_affinity, \
+ _Scheduler_priority_affinity_SMP_Set_affinity \
+ }
+
+/**
+ * @brief Allocates @a the_thread->scheduler.
+ *
+ * This routine allocates @a the_thread->scheduler.
+ *
+ * @param[in] the_thread is the thread the scheduler is allocating
+ * management memory for
+ */
+void * _Scheduler_priority_affinity_SMP_Allocate( Thread_Control *the_thread );
+
+/**
+ * @brief Get affinity for the priority affinity smp scheduler.
+ *
+ * @param[in] thread The associated thread.
+ * @param[in] cpusetsize The size of the cpuset.
+ * @param[in,out] cpuset The associated affinity set.
+ *
+ * @retval 0 Successfully got cpuset
+ * @retval -1 The cpusetsize is invalid for the system
+ */
+bool _Scheduler_priority_affinity_SMP_Get_affinity(
+ Thread_Control *thread,
+ size_t cpusetsize,
+ cpu_set_t *cpuset
+);
+
+/**
+ * @brief Set affinity for the priority affinity smp scheduler.
+ *
+ * @param[in] thread The associated thread.
+ * @param[in] cpusetsize The size of the cpuset.
+ * @param[in] cpuset Affinity new affinity set.
+ *
+ * @retval 0 Successful
+ */
+bool _Scheduler_priority_affinity_SMP_Set_affinity(
+ Thread_Control *thread,
+ size_t cpusetsize,
+ cpu_set_t *cpuset
+);
+
+/**
+ * This structure handles affinity specific data of a thread.
+ *
+ * @note The attribute priority_sched_info must remain
+ * the first element in the structure so that the
+ * Scheduler_priority_XXX methods will continue to
+ * function.
+ */
+typedef struct {
+
+ /**
+ * Data for the Priority Scheduler.
+ */
+ Scheduler_priority_Per_thread Priority_sched_info;
+
+ /**
+ * Pointer to corresponding Thread Control Block.
+ */
+ Thread_Control *thread;
+
+ /**
+ * Structure containing affinity set data and size
+ */
+ CPU_set_Control Affinity;
+} Scheduler_priority_affinity_SMP_Per_thread;
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _RTEMS_SCORE_SCHEDULERPRIORITYSMP_H */
diff --git a/cpukit/score/preinstall.am b/cpukit/score/preinstall.am
index 68ded43..efbe37d 100644
--- a/cpukit/score/preinstall.am
+++ b/cpukit/score/preinstall.am
@@ -386,6 +386,10 @@ $(PROJECT_INCLUDE)/rtems/score/cpustdatomic.h: include/rtems/score/cpustdatomic.
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/score/cpustdatomic.h
PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/score/cpustdatomic.h
+$(PROJECT_INCLUDE)/rtems/score/schedulerpriorityaffinitysmp.h: include/rtems/score/schedulerpriorityaffinitysmp.h $(PROJECT_INCLUDE)/rtems/score/$(dirstamp)
+ $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/score/schedulerpriorityaffinitysmp.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/score/schedulerpriorityaffinitysmp.h
+
$(PROJECT_INCLUDE)/rtems/score/schedulersimplesmp.h: include/rtems/score/schedulersimplesmp.h $(PROJECT_INCLUDE)/rtems/score/$(dirstamp)
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/score/schedulersimplesmp.h
PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/score/schedulersimplesmp.h
diff --git a/cpukit/score/src/schedulerpriorityaffinitysmp.c b/cpukit/score/src/schedulerpriorityaffinitysmp.c
new file mode 100644
index 0000000..6d7dd3b
--- /dev/null
+++ b/cpukit/score/src/schedulerpriorityaffinitysmp.c
@@ -0,0 +1,80 @@
+/**
+ * @file
+ *
+ * @brief Deterministic Priority Affinity SMP Scheduler Implementation
+ *
+ * @ingroup ScoreSchedulerPriorityAffinitySMP
+ */
+
+/*
+ * COPYRIGHT (c) 2014.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#if HAVE_CONFIG_H
+ #include "config.h"
+#endif
+
+#include <rtems/score/schedulerpriorityaffinitysmp.h>
+#include <rtems/score/schedulerpriorityimpl.h>
+#include <rtems/score/schedulersmpimpl.h>
+#include <rtems/score/wkspace.h>
+#include <rtems/score/cpusetimpl.h>
+
+RTEMS_INLINE_ROUTINE Scheduler_priority_affinity_SMP_Per_thread *
+_Scheduler_priority_affinity_Get_scheduler_info( Thread_Control *thread )
+{
+ return ( Scheduler_priority_affinity_SMP_Per_thread * ) thread->scheduler_info;
+}
+
+void * _Scheduler_priority_affinity_SMP_Allocate( Thread_Control *the_thread )
+{
+ Scheduler_priority_affinity_SMP_Per_thread *info =
+ _Workspace_Allocate( sizeof( *info ) );
+
+ info->Affinity = *_CPU_set_Default();
+ info->Affinity.set = &info->Affinity.preallocated;
+
+ the_thread->scheduler_info = info;
+
+ return info;
+}
+
+bool _Scheduler_priority_affinity_SMP_Get_affinity(
+ Thread_Control *thread,
+ size_t cpusetsize,
+ cpu_set_t *cpuset
+)
+{
+ Scheduler_priority_affinity_SMP_Per_thread *info =
+ _Scheduler_priority_affinity_Get_scheduler_info(thread);
+
+ if ( info->Affinity.setsize != cpusetsize ) {
+ return false;
+ }
+
+ CPU_COPY( cpuset, info->Affinity.set );
+ return true;
+}
+
+bool _Scheduler_priority_affinity_SMP_Set_affinity(
+ Thread_Control *thread,
+ size_t cpusetsize,
+ cpu_set_t *cpuset
+)
+{
+ Scheduler_priority_affinity_SMP_Per_thread *info =
+ _Scheduler_priority_affinity_Get_scheduler_info(thread);
+
+ if ( ! _CPU_set_Is_valid( cpuset, cpusetsize ) ) {
+ return false;
+ }
+
+ CPU_COPY( info->Affinity.set, cpuset );
+
+ return true;
+}
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