cpuset(3) - NetBSD Manual Pages

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CPUSET(3)               NetBSD Library Functions Manual              CPUSET(3)


NAME

     cpuset_create, cpuset_destroy, cpuset_zero, cpuset_set, cpuset_clr,
     cpuset_isset, cpuset_size -- dynamic CPU sets


SYNOPSIS

     #include <sched.h>

     cpuset_t *
     cpuset_create(void);

     void
     cpuset_destroy(cpuset_t *set);

     void
     cpuset_zero(cpuset_t *set);

     int
     cpuset_set(cpuid_t cpu, cpuset_t *set);

     int
     cpuset_clr(cpuid_t cpu, cpuset_t *set);

     int
     cpuset_isset(cpuid_t cpu, const cpuset_t *set);

     size_t
     cpuset_size(const cpuset_t *set);


DESCRIPTION

     This section describes the functions used to create, set, use and destroy
     the dynamic CPU sets.

     This API can be used with the POSIX threads, see pthread(3) and
     affinity(3).

     The ID of the primary CPU in the system is 0.


FUNCTIONS

     cpuset_create()
              Allocates and initializes a clean CPU-set.  Returns the pointer
              to the CPU-set, or NULL on failure.

     cpuset_destroy(set)
              Destroy the CPU-set specified by set.

     cpuset_zero(set)
              Makes the CPU-set specified by set clean, that is, memory is
              initialized to zero bytes, and none of the CPUs set.

     cpuset_set(cpu, set)
              Sets the CPU specified by cpu in set.  Returns zero on success,
              and -1 if cpu is invalid.

     cpuset_clr(cpu, set)
              Clears the CPU specified by cpu in the CPU-set set.  Returns
              zero on success, and -1 if cpu is invalid.

     cpuset_isset(cpu, set)
              Checks if CPU specified by cpu is set in the CPU-set set.
              Returns the positive number if set, zero if not set, and -1 if
              cpu is invalid.

     cpuset_size(set)
              Returns the size in bytes of CPU-set specified by set.


SEE ALSO

     affinity(3), pset(3), sched(3), schedctl(8), kcpuset(9)


HISTORY

     The dynamic CPU sets appeared in NetBSD 5.0.

NetBSD 8.0                     November 2, 2011                     NetBSD 8.0