Hi All,
details:
Rtems head: 7 Jan. 2014
BSP: xilinx_zynq_zedboard
Goal: cpu_idle_report_implementation
I'm adjusting a piece of code we've used succesfully with rtems 4.9 and rtems
4.10 in combination with the Sparc BSP (Leon processor).
This code is used to measure the idle time of the processor.
I'm adjusting this code in order to be used with the recent rtems head of 7
Jan. 2014 and the BSP of the xilinx_zynq_zedboard
I've added the following include
#include <rtems/score/objectimpl.h>
in order to access the 'Object_Information' object
The only problem I'm still having is that I cannot find an equal implementation
of '_Thread_Idle'
in rtems 4.9 and 4.10 (sparc bsp) this is implemented at line 435 of
sparc-rtems4.10/include/rtems/score/thread.h (SCORE_EXTERN Thread_Control
*Thread_Idle;)
however in 4.11 with the xilinx_zynq_zedboard bsp I cannot find a similar
implementation.
file: rtems/cpukit/libmisc/cpuuse/cpuidlereport.c
// CPU Usage Reporter
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <inttypes.h>
#include <rtems/cpuuse.h>
#include <rtems/bspIo.h>
// added this in v4.11 in order to acces 'Objects_Information'
#include <rtems/score/objectimpl.h>
#if defined(RTEMS_ENABLE_NANOSECOND_CPU_USAGE_STATISTICS)
#include <rtems/score/timespec.h>
#endif
#ifdef RTEMS_ENABLE_NANOSECOND_CPU_USAGE_STATISTICS
extern struct timespec CPU_usage_Uptime_at_last_reset;
#endif
uint32_t rtems_cpu_idle_report( void )
{
uint32_t ival, fval, promille = 1000;
/*
* 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.
*/
#ifdef RTEMS_ENABLE_NANOSECOND_CPU_USAGE_STATISTICS
struct timespec uptime, total, rane/
_TOD_Get_uptime( &uptime );
_Timespec_Subtract( &CPU_usage_Uptime_at_last_reset, &uptime, &total );
ran = _Thread_Idle->cpu_time_used;
_Timespec_Divide( &ran, &total, &ival, &fval );
#else
uint32_t i;
uint32_t api_index;
Thread_Control *the_thread;
Objects_Information *information;
uint32_t total_units = 0;
for ( api_index = 1 ; api_index <= OBJECTS_APIS_LAST ; api_index++ ) {
if ( !_Objects_Information_table[ api_index ] )
continue;
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;
}
}
}
ival = (total_units) ? _Thread_Idle->cpu_time_used * 10000 / total_units : 0;
fval = ival % 100;
ival /= 100;
#endif
promille = ival * 10 + fval / 100;
return promille;
}
Any ideas on what I'm missing here?
Thanks,
Giovanni Macciocu, Software Design Engineer
SRON Netherlands Institute for Space Research
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