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<div>Hi everyone,</div>
<div> </div>
<div>I use RTEMS on a MicroBlaze processor (implemented in a Spartan6 FPGA, on a SP605 evaluation kit), and I can’t create two tasks. I have tried this simple code :</div>
<div> </div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">rtems_task Init(</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> rtems_task_argument ignored</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">)</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">{ </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> rtems_status_code status_rtems;</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> printf("\n*** Test begins *** \n\n");</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> Task_name[ 1 ] = rtems_build_name( 'T', 'A', '1', ' ' );</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> Task_name[ 2 ] = rtems_build_name( 'T', 'A', '2', ' ' );</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> /* Creating and executing task 1 */</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> status_rtems = rtems_task_create(</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> Task_name[ 1 ], 1, RTEMS_MINIMUM_STACK_SIZE * 2, RTEMS_DEFAULT_MODES,</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> RTEMS_DEFAULT_ATTRIBUTES, &Task_id[ 1 ]</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> );</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> printf("\n At the end of task create 1, status_rtems = %d\n",(int)status_rtems);</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> status_rtems = rtems_task_start( Task_id[ 1 ], print1, 1 );</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> printf("\n At the end of task start 1, status_rtems = %d\n",(int)status_rtems);</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> /* Creating and executing task 2 */</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> status_rtems = rtems_task_create(</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> Task_name[ 2 ], 1, RTEMS_MINIMUM_STACK_SIZE * 2, RTEMS_DEFAULT_MODES,</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> RTEMS_DEFAULT_ATTRIBUTES, &Task_id[ 2 ]</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> );</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> printf("\n At the end of task create 2, status_rtems = %d\n",(int)status_rtems);</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> status_rtems = rtems_task_start( Task_id[ 2 ], print2, 1 );</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> printf("\n At the end of task start 2, status_rtems = %d\n",(int)status_rtems);</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> rtems_task_delete(RTEMS_SELF);</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">}</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">rtems_task print1(rtems_task_argument unused){</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> printf("\nTask 1 is executing !\n");</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> while(1){}</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">}</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">rtems_task print2(rtems_task_argument unused){</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> printf("\nTask 2 is executing !\n");</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> while(1){}</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">}</span></font></div>
<div><font face="Times New Roman" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Times New Roman" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font size="3"><span style="font-size:12pt;">And in my terminal I’ve got this : </span></font></div>
<div><font face="Times New Roman" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Times New Roman" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Times New Roman" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">*** Test begins ***</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">At the end of task create 1, status_rtems = 0</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">At the end of task start 1, status_rtems = 0</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">At the end of task create 1, status_rtems = 13</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">At the end of task start 1, status_rtems = 14</span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Courier New" size="3"><span style="font-size:12pt;">Task 1 is executing </span></font></div>
<div><font face="Times New Roman" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Times New Roman" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font size="3"><span style="font-size:12pt;">As you can see, task 1 is created, and executes fine. But the creating of task 2 return the status : <font face="Courier New" size="2"><span style="font-size:10pt;">RTEMS_UNSATISFIED</span></font><font face="Liberation Serif">
- not enough memory for stack/FP context</font><font face="Liberation Serif">.</font></span></font></div>
<div><font size="3"><span style="font-size:12pt;">However, I have plenty of space left on my RTEMS Workspace, and I do not use floating point context.</span></font></div>
<div><font size="3"><span style="font-size:12pt;">Going deeper with GDB, I have found that is the allocation in the heap that goes bad :</span></font></div>
<div><font size="3"><span style="font-size:12pt;">In function _<i>Heap_Allocate_</i><i>aligned_with</i><i>_boundary</i> (in cpukit/score/src/heapallocate.c), the Heap_Block “block” and “free_list_tail” have their fields <i>next </i>and <i>prev</i> pointing
to themself. </span></font></div>
<div><font face="Times New Roman" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font size="3"><span style="font-size:12pt;">I also tried to delete task 1 after the creation (the deleting was successful), but I have got the same error when creating task 2.</span></font></div>
<div><font face="Times New Roman" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font size="3"><span style="font-size:12pt;">As anyone of you has an explication ?</span></font></div>
<div><font size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font size="3"><span style="font-size:12pt;">Thanks a lot,</span></font></div>
<div><font size="3"><span style="font-size:12pt;">Dimitri Tuaz</span></font></div>
<div><font face="Times New Roman" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Times New Roman" size="3"><span style="font-size:12pt;"> </span></font></div>
<div><font face="Times New Roman" size="3"><span style="font-size:12pt;"> </span></font></div>
<div> </div>
<div> </div>
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