>From 3918fcb958e14e0d325901f90538f31c8cda940a Mon Sep 17 00:00:00 2001
From: "Moroz.Oleg" <oleg.mo...@mcc.vniiem.ru>
Date: Wed, 17 Dec 2014 17:26:19 +0300
Subject: [PATCH 2/2] Adding CPU usage statistic get for usage in user code
---
cpukit/libmisc/cpuuse/cpuusagereport.c | 115 +++++++++++++++++++++++++++++++++
cpukit/libmisc/cpuuse/cpuuse.h | 16 +++++
2 files changed, 131 insertions(+)
diff --git a/cpukit/libmisc/cpuuse/cpuusagereport.c b/cpukit/libmisc/cpuuse/cpuusagereport.c
index 296fa28..f0fb869 100644
--- a/cpukit/libmisc/cpuuse/cpuusagereport.c
+++ b/cpukit/libmisc/cpuuse/cpuusagereport.c
@@ -225,3 +225,118 @@ void rtems_cpu_usage_report( void )
{
rtems_cpu_usage_report_with_plugin( NULL, printk_plugin );
}
+
+void rtems_cpu_usage_statistic_get(cpu_usage_t *usage_array, uint32_t count)
+{
+ uint32_t threads_found = 0;
+ uint32_t i;
+ uint32_t api_index;
+ Thread_Control *the_thread;
+ Objects_Information *information;
+ char name[13];
+ uint32_t ival, fval;
+#ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__
+ Timestamp_Control uptime, total, ran, uptime_at_last_reset;
+ uint32_t seconds, nanoseconds;
+#else
+ uint32_t total_units = 0;
+#endif
+
+ if (!usage_array || count == 0 ) return;
+for (threads_found=0;threads_found<count;threads_found++)
+{
+ usage_array[threads_found].task_id = 0;
+ memset(usage_array[threads_found].task_name,0,sizeof(usage_array[threads_found].task_name));
+ usage_array[threads_found].usage_in_percents = 0.0f;
+}
+threads_found = 0;
+
+#ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__
+ _Timestamp_Set_to_zero( &total );
+ uptime_at_last_reset = CPU_usage_Uptime_at_last_reset;
+#else
+ for ( api_index = 1 ; api_index <= OBJECTS_APIS_LAST && threads_found<count; api_index++ ) {
+#if !defined(RTEMS_POSIX_API) || defined(RTEMS_DEBUG)
+ if ( !_Objects_Information_table[ api_index ] )
+ continue;
+#endif
+
+ information = _Objects_Information_table[ api_index ][ 1 ];
+ if ( information ) {
+ for ( i=1 ; i <= information->maximum ; i++ ) {
+ the_thread = (Thread_Control *)information->local_table[ i ];
+
+ if ( the_thread )
+ total_units += the_thread->cpu_time_used;
+ }
+ }
+ }
+#endif
+
+
+ for ( api_index = 1 ; api_index <= OBJECTS_APIS_LAST && threads_found<count; api_index++ ) {
+#if !defined(RTEMS_POSIX_API) || defined(RTEMS_DEBUG)
+ if ( !_Objects_Information_table[ api_index ] )
+ continue;
+#endif
+
+ information = _Objects_Information_table[ api_index ][ 1 ];
+ if ( information ) {
+ for ( i=1 ; i <= information->maximum ; i++ ) {
+ the_thread = (Thread_Control *)information->local_table[ i ];
+
+ if ( !the_thread )
+ continue;
+
+ rtems_object_get_name( the_thread->Object.id, sizeof(name), name );
+
+ usage_array[threads_found].task_id = the_thread->Object.id;
+ memcpy(usage_array[threads_found].task_name,name,sizeof(name));
+
+#ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__
+ {
+ Timestamp_Control last;
+
+ ran = the_thread->cpu_time_used;
+ if ( is_executing_on_a_core( the_thread, &last ) ) {
+ Timestamp_Control used;
+ _TOD_Get_uptime( &uptime );
+ _Timestamp_Subtract( &last, &uptime, &used );
+ _Timestamp_Add_to( &ran, &used );
+ } else {
+ _TOD_Get_uptime( &uptime );
+ }
+ _Timestamp_Subtract( &uptime_at_last_reset, &uptime, &total );
+ _Timestamp_Divide( &ran, &total, &ival, &fval );
+
+ seconds = _Timestamp_Get_seconds( &ran );
+ nanoseconds = _Timestamp_Get_nanoseconds( &ran ) /
+ TOD_NANOSECONDS_PER_MICROSECOND;
+
+ usage_array[threads_found].usage_in_percents = ival+(fval/1000.0);
+ }
+#else
+ if (total_units) {
+ uint64_t ival_64;
+
+ ival_64 = the_thread->cpu_time_used;
+ ival_64 *= 100000;
+ ival = ival_64 / total_units;
+ } else {
+ ival = 0;
+ }
+
+ fval = ival % 1000;
+ ival /= 1000;
+ usage_array[threads_found].usage_in_percents = ival+(fval/1000.0);
+#endif
+
+ threads_found++;
+ }
+
+
+ }
+
+ }
+
+}
diff --git a/cpukit/libmisc/cpuuse/cpuuse.h b/cpukit/libmisc/cpuuse/cpuuse.h
index 1aee275..9b7b371 100644
--- a/cpukit/libmisc/cpuuse/cpuuse.h
+++ b/cpukit/libmisc/cpuuse/cpuuse.h
@@ -39,6 +39,14 @@
extern "C" {
#endif
+typedef struct
+{
+ rtems_id task_id;
+ uint8_t task_name[13];
+ float usage_in_percents;
+}cpu_usage_t;
+
+
#ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__
extern Timestamp_Control CPU_usage_Uptime_at_last_reset;
#else
@@ -70,6 +78,14 @@ void rtems_cpu_usage_report( void );
void rtems_cpu_usage_reset( void );
+/**
+ * @brief Get CPU usage into array of cpu_usage_t
+ *
+ * CPU Usage Reporter for telemetry
+ */
+
+void rtems_cpu_usage_statistic_get(cpu_usage_t *usage_array, uint32_t count);
+
#ifdef __cplusplus
}
#endif
--
2.1.3
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