libmisc/cpuuse/cpuusagereset.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSImplCPUUsageReporting
0007  *
0008  * @brief This source file contains the definition of
0009  *   rtems_cpu_usage_reset().
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-2009
0014  *  On-Line Applications Research Corporation (OAR).
0015  *
0016  * Redistribution and use in source and binary forms, with or without
0017  * modification, are permitted provided that the following conditions
0018  * are met:
0019  * 1. Redistributions of source code must retain the above copyright
0020  *    notice, this list of conditions and the following disclaimer.
0021  * 2. Redistributions in binary form must reproduce the above copyright
0022  *    notice, this list of conditions and the following disclaimer in the
0023  *    documentation and/or other materials provided with the distribution.
0024  *
0025  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0026  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0027  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0028  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0029  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0030  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0031  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0032  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0033  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0034  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0035  * POSSIBILITY OF SUCH DAMAGE.
0036  */
0037
0038 #ifdef HAVE_CONFIG_H
0039 #include "config.h"
0040 #endif
0041
0042 #include <rtems/cpuuse.h>
0043 #include <rtems/rtems/scheduler.h>
0044 #include <rtems/score/percpu.h>
0045 #include <rtems/score/todimpl.h>
0046 #include <rtems/score/schedulerimpl.h>
0047 #include <rtems/score/watchdogimpl.h>
0048
0049 #include "cpuuseimpl.h"
0050
0051 static bool CPU_usage_Per_thread_handler(
0052   Thread_Control *the_thread,
0053   void           *arg
0054 )
0055 {
0056   const Scheduler_Control *scheduler;
0057   ISR_lock_Context         state_lock_context;
0058   ISR_lock_Context         scheduler_lock_context;
0059
0060   _Thread_State_acquire( the_thread, &state_lock_context );
0061   scheduler = _Thread_Scheduler_get_home( the_thread );
0062   _Scheduler_Acquire_critical( scheduler, &scheduler_lock_context );
0063
0064   the_thread->cpu_time_used_at_last_reset =
0065     _Thread_Get_CPU_time_used_locked( the_thread );
0066
0067   _Scheduler_Release_critical( scheduler, &scheduler_lock_context );
0068   _Thread_State_release( the_thread, &state_lock_context );
0069   return false;
0070 }
0071
0072 /*
0073  *  rtems_cpu_usage_reset
0074  */
0075 void rtems_cpu_usage_reset( void )
0076 {
0077   uint32_t cpu_count;
0078   uint32_t cpu_index;
0079
0080   _TOD_Get_uptime( &CPU_usage_Uptime_at_last_reset );
0081
0082   cpu_count = rtems_scheduler_get_processor_maximum();
0083   for ( cpu_index = 0 ; cpu_index < cpu_count ; ++cpu_index ) {
0084     Per_CPU_Control *cpu = _Per_CPU_Get_by_index( cpu_index );
0085
0086     cpu->cpu_usage_timestamp = CPU_usage_Uptime_at_last_reset;
0087   }
0088
0089   rtems_task_iterate(CPU_usage_Per_thread_handler, NULL);
0090 }