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/**
* @file
*
* @brief CPU Usage Report
* @ingroup libmisc_cpuuse CPU Usage
*/
/*
* COPYRIGHT (c) 1989-2010.
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <inttypes.h>
#include <rtems/cpuuse.h>
#include <rtems/score/objectimpl.h>
#include <rtems/score/todimpl.h>
#include <rtems/score/watchdogimpl.h>
#ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__
static bool is_executing_on_a_core(
Thread_Control *the_thread,
Timestamp_Control *time_of_context_switch
)
{
#ifndef RTEMS_SMP
if ( _Thread_Executing->Object.id == the_thread->Object.id ) {
*time_of_context_switch = _Thread_Time_of_last_context_switch;
return true;
}
#else
/* FIXME: Locking */
if ( the_thread->is_executing ) {
*time_of_context_switch = the_thread->cpu->time_of_last_context_switch;
return true;
}
#endif
return false;
}
#endif
/*
* rtems_cpu_usage_report
*/
void rtems_cpu_usage_report_with_plugin(
void *context,
rtems_printk_plugin_t print
)
{
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 ( !print )
return;
/*
* When not using nanosecond CPU usage resolution, we have to count
* the number of "ticks" we gave credit for to give the user a rough
* guideline as to what each number means proportionally.
*/
#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 ; 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
(*print)(
context,
"-------------------------------------------------------------------------------\n"
" CPU USAGE BY THREAD\n"
"------------+----------------------------------------+---------------+---------\n"
#ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__
" ID | NAME | SECONDS | PERCENT\n"
#else
" ID | NAME | TICKS | PERCENT\n"
#endif
"------------+----------------------------------------+---------------+---------\n"
);
for ( api_index = 1 ; api_index <= OBJECTS_APIS_LAST ; 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 );
(*print)(
context,
" 0x%08" PRIx32 " | %-38s |",
the_thread->Object.id,
name
);
#ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__
{
Timestamp_Control last;
/*
* If this is the currently executing thread, account for time
* since the last context switch.
*/
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 );
/*
* Print the information
*/
seconds = _Timestamp_Get_seconds( &ran );
nanoseconds = _Timestamp_Get_nanoseconds( &ran ) /
TOD_NANOSECONDS_PER_MICROSECOND;
(*print)( context,
"%7" PRIu32 ".%06" PRIu32 " |%4" PRIu32 ".%03" PRIu32 "\n",
seconds, nanoseconds,
ival, fval
);
}
#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;
(*print)( context,
"%14" PRIu32 " |%4" PRIu32 ".%03" PRIu32 "\n",
the_thread->cpu_time_used,
ival,
fval
);
#endif
}
}
}
#ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__
seconds = _Timestamp_Get_seconds( &total );
nanoseconds = _Timestamp_Get_nanoseconds( &total ) /
TOD_NANOSECONDS_PER_MICROSECOND;
(*print)(
context,
"------------+----------------------------------------+---------------+---------\n"
" TIME SINCE LAST CPU USAGE RESET IN SECONDS: %7" PRIu32 ".%06" PRIu32 "\n"
"-------------------------------------------------------------------------------\n",
seconds, nanoseconds
);
#else
(*print)(
context,
"------------+----------------------------------------+---------------+---------\n"
" TICKS SINCE LAST SYSTEM RESET: %14" PRIu32 "\n"
" TOTAL UNITS: %14" PRIu32 "\n"
"-------------------------------------------------------------------------------\n",
_Watchdog_Ticks_since_boot - CPU_usage_Ticks_at_last_reset,
total_units
);
#endif
}
void rtems_cpu_usage_report( void )
{
rtems_cpu_usage_report_with_plugin( NULL, printk_plugin );
}
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