NAME

       pthread_attr_setcpu_np,  pthread_attr_getcpu_np  - examine
       and change the CPU pthread attribute



SYNOPSIS

       #include <rtl_sched.h>

       int pthread_sttr_setcpu_np(pthread_attr_t *attr, int cpu);
       int   pthread_sttr_getcpu_np(pthread_attr_t   *attr,   int
       *cpu);



DESCRIPTION

       These functions are non-portable  Real-Time  Linux  exten­
       sions. On SMP machines they allow a thread to be scheduled
       on a specific CPU.

       pthread_attr_setcpu_np  modifies  the   thread   attribute
       object  attribute  so  that  the  created  thread would be
       scheduled  on  the  CPU  with  id  cpu  (as  displayed  in
       /proc/cpuinfo  ).  The  thread attribute object attr first
       has to be initialized with pthread_attr_init(3).

       pthread_attr_getcpu_np fills the location  pointed  to  by
       cpu with the CPU id from the attribute structure.



RETURN VALUE

       All  functions  return  0  on success and a non-zero error
       code on error.



ERRORS

       pthread_attr_getcpu_np returns EINVAL if the specified CPU
       does not exist in the system.



NOTES

       If  pthread_attr_setcpu_np  was  not used on the attribute
       object passed to pthread_create, the thread  is  scheduled
       on the current CPU.



AUTHOR

       Michael Barabanov <baraban@fsmlabs.com>



SEE ALSO

       pthread_attr_getstacksize(3)  pthread_attr_setstacksize(3)
       pthread_attr_setschedparam(3)         pthread_attr_init(3)
       pthread_attr_getschedparam(3) pthread_create(3)



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