I have a problem with the priority of ecos

[moktar_bouain]

Hello ,
I have a problem  with  the priority of ecos.
 I have the following configuration:

#include <cyg/kernel/kapi.h>

#include <stdio.h>
#include <math.h>
#include <stdlib.h>
cyg_thread thread_s[2];         
char stack[2][4096]; 
cyg_handle_t simple_threadA, simple_threadB;
cyg_mutex_t cliblock;
void taska(cyg_addrword_t data)
{
printf("TASKA \n");
  }
void taskb(cyg_addrword_t data)
{
printf("TASKB \n");
  
}

void cyg_user_start(void)
{
  printf("Entering twothreads' cyg_user_start() function\n");

  cyg_mutex_init(&cliblock);

  cyg_thread_create(10, taska, (cyg_addrword_t) 0,"Thread A", (void *)
stack[0], 4096,&simple_threadA, &thread_s[0]);
  cyg_thread_create(0, taskb, (cyg_addrword_t) 1,"Thread B", (void *)
stack[1], 4096,&simple_threadB, &thread_s[1]);
  }

void main (cyg_addrword_t data)
{
  for(;;)
 {
  cyg_thread_resume(simple_threadA);
  cyg_thread_resume(simple_threadB);
}
}

 when I execute  this configuration:
TASKB 
TASKB 
TASKB 
TASKB 
TASKB 
TASKB 
TASKB 
TASKB 
TASKB 
TASKB 
TASKB 

but when  I changed the priority: 

  cyg_thread_create(1, taska, (cyg_addrword_t) 0,"Thread A", (void *)
stack[0], 4096,&simple_threadA, &thread_s[0]);
  cyg_thread_create(0, taskb, (cyg_addrword_t) 1,"Thread B", (void *)
stack[1], 4096,&simple_threadB, &thread_s[1]);
I find  this  false result
TASKB 
TASKA 
TASKB 
TASKA 
TASKB 
TASKA 
TASKB 
TASKA 
TASKB 
TASKA 
TASKB 
TASKA 
TASKB 
TASKA 
TASKB 

Any help??
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