score: Add per-CPU profiling

Add per-CPU profiling stats API.  Implement the thread dispatch disable
level profiling.  The interrupt profiling must be implemented in CPU
port specific parts (mostly assembler code).  Add a support function
_Profiling_Outer_most_interrupt_entry_and_exit() for this purpose.

1 files changed, 113 insertions, 0 deletions

diff --git a/cpukit/score/include/rtems/score/profiling.h b/cpukit/score/include/rtems/score/profiling.h
new file mode 100644
index 0000000000..468c124450
--- /dev/null
+++ b/cpukit/score/include/rtems/score/profiling.h
@@ -0,0 +1,113 @@
+/**
+ * @file
+ *
+ * @ingroup ScoreProfiling
+ *
+ * @brief Profiling Support API
+ */
+
+/*
+ * Copyright (c) 2014 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#ifndef _RTEMS_SCORE_PROFILING
+#define _RTEMS_SCORE_PROFILING
+
+#include <rtems/score/percpu.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @defgroup ScoreProfiling Profiling Support
+ *
+ * @brief Profiling support.
+ *
+ * @{
+ */
+
+static inline void _Profiling_Thread_dispatch_disable(
+  Per_CPU_Control *per_cpu,
+  uint32_t previous_thread_dispatch_disable_level
+)
+{
+#if defined( RTEMS_PROFILING )
+  if ( previous_thread_dispatch_disable_level == 0 ) {
+    Per_CPU_Stats *stats = &per_cpu->Stats;
+
+    stats->thread_dispatch_disabled_instant = _CPU_Counter_read();
+    ++stats->thread_dispatch_disabled_count;
+  }
+#else
+  (void) per_cpu;
+  (void) previous_thread_dispatch_disable_level;
+#endif
+}
+
+static inline void _Profiling_Thread_dispatch_enable(
+  Per_CPU_Control *per_cpu,
+  uint32_t new_thread_dispatch_disable_level
+)
+{
+#if defined( RTEMS_PROFILING )
+  if ( new_thread_dispatch_disable_level == 0 ) {
+    Per_CPU_Stats *stats = &per_cpu->Stats;
+    CPU_Counter_ticks now = _CPU_Counter_read();
+    CPU_Counter_ticks delta = _CPU_Counter_difference(
+      now,
+      stats->thread_dispatch_disabled_instant
+    );
+
+    stats->total_thread_dispatch_disabled_time += delta;
+
+    if ( stats->max_thread_dispatch_disabled_time < delta ) {
+      stats->max_thread_dispatch_disabled_time = delta;
+    }
+  }
+#else
+  (void) per_cpu;
+  (void) new_thread_dispatch_disable_level;
+#endif
+}
+
+static inline void _Profiling_Update_max_interrupt_delay(
+  Per_CPU_Control *per_cpu,
+  CPU_Counter_ticks interrupt_delay
+)
+{
+#if defined( RTEMS_PROFILING )
+  Per_CPU_Stats *stats = &per_cpu->Stats;
+
+  if ( stats->max_interrupt_delay < interrupt_delay ) {
+    stats->max_interrupt_delay = interrupt_delay;
+  }
+#else
+  (void) per_cpu;
+  (void) interrupt_delay;
+#endif
+}
+
+void _Profiling_Outer_most_interrupt_entry_and_exit(
+  Per_CPU_Control *per_cpu,
+  CPU_Counter_ticks interrupt_entry_instant,
+  CPU_Counter_ticks interrupt_exit_instant
+);
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _RTEMS_SCORE_PROFILING */