lfr_cpu_usage_report.c
115 lines
| 3.5 KiB
| text/x-c
|
CLexer
r300 | /* | |||
* CPU Usage Reporter | ||||
* | ||||
* COPYRIGHT (c) 1989-2009 | ||||
* 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.com/license/LICENSE. | ||||
* | ||||
* $Id$ | ||||
*/ | ||||
#include "lfr_cpu_usage_report.h" | ||||
unsigned char lfr_rtems_cpu_usage_report( void ) | ||||
{ | ||||
uint32_t api_index; | ||||
Thread_Control *the_thread; | ||||
Objects_Information *information; | ||||
uint32_t ival, fval; | ||||
#ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__ | ||||
Timestamp_Control uptime; | ||||
Timestamp_Control total; | ||||
Timestamp_Control ran; | ||||
#else | ||||
uint32_t total_units = 0; | ||||
#endif | ||||
unsigned char cpu_load; | ||||
cpu_load = 0; | ||||
/* | ||||
* 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__ | ||||
_TOD_Get_uptime( &uptime ); | ||||
_Timestamp_Subtract( &CPU_usage_Uptime_at_last_reset, &uptime, &total ); | ||||
#else | ||||
for ( api_index = 1 ; api_index <= OBJECTS_APIS_LAST ; api_index++ ) { | ||||
if ( !_Objects_Information_table[ api_index ] ) { } | ||||
else | ||||
{ | ||||
information = _Objects_Information_table[ api_index ][ 1 ]; | ||||
if ( information != NULL ) | ||||
{ | ||||
for ( i=1 ; i <= information->maximum ; i++ ) { | ||||
the_thread = (Thread_Control *)information->local_table[ i ]; | ||||
if ( the_thread != NULL ) | ||||
total_units += the_thread->cpu_time_used; | ||||
} | ||||
} | ||||
} | ||||
} | ||||
#endif | ||||
for ( api_index = 1 ; api_index <= OBJECTS_APIS_LAST ; api_index++ ) | ||||
{ | ||||
if ( !_Objects_Information_table[ api_index ] ) { } | ||||
else | ||||
{ | ||||
information = _Objects_Information_table[ api_index ][ 1 ]; | ||||
if ( information != NULL ) | ||||
{ | ||||
the_thread = (Thread_Control *)information->local_table[ 1 ]; | ||||
if ( the_thread == NULL ) { } | ||||
else | ||||
{ | ||||
#ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__ | ||||
/* | ||||
* If this is the currently executing thread, account for time | ||||
* since the last context switch. | ||||
*/ | ||||
ran = the_thread->cpu_time_used; | ||||
if ( _Thread_Executing->Object.id == the_thread->Object.id ) | ||||
{ | ||||
Timestamp_Control used; | ||||
_Timestamp_Subtract( | ||||
&_Thread_Time_of_last_context_switch, &uptime, &used | ||||
); | ||||
_Timestamp_Add_to( &ran, &used ); | ||||
} | ||||
_Timestamp_Divide( &ran, &total, &ival, &fval ); | ||||
#else | ||||
if (total_units != 0) | ||||
{ | ||||
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; | ||||
#endif | ||||
} | ||||
} | ||||
} | ||||
} | ||||
cpu_load = (unsigned char) (100 - ival); | ||||
return cpu_load; | ||||
} | ||||