SCHED_FIFO    ,     -
   ,         . 
     ,   
SCHED_FIFO,        (round-
robin).  ,    SCHED_FIFO,  -
  ,          -
   ,     .

 SCHED_RR   SCHED_FIFO,   ,
       ,    -
   .  ,  SCHED_RR  
SCHED_FIFO   , ..    (round-robin)
 .        -
 SCHED RR,          -
 .      ,  -
      .      
SCHED_FIFO,          
  ,         -
      SCHED_RR,    -
   .

       -
.         -
  .  ,  ,    
,         .

       Linux -
       (soft real-time). 
   ,     
      ,   
   .    
      (hard real-time)  
        
.   Linux     -
   .       Linux
,        ,  
  .    Linux   ,  -
     ,     -
  Linux      .  
2.6       .

       1  MAX_RT_PRIO  1.
    MAX_RT_PRIO  100,   -
        1  99. 
       nice
   SCHED_OTHER,    -
   MAX_RT_PRIO   (MAX_RT_PRIO+40).  
 ,     nice  -20  +19  -
       100  139.

90  4