pset_info(2)

NAME

     pset_info - get information about a processor set

SYNOPSIS

     #include <sys/pset.h>

     int pset_info(psetid_t pset,  int  *type,  uint_t  *numcpus,
     processorid_t *cpulist);

DESCRIPTION

     The pset_info() function returns information on the  proces-
     sor set pset.

     If type is non-null, then on successful completion the  type
     of  the processor set will be stored in the location pointed
     to by type. Processor  set  types  can  have  the  following
     values:

     PS_SYSTEM
           The processor set was created by the system. Processor
           sets of this type cannot be modified or removed by the
           user, but LWPs and processes  can  be  bound  to  them
           using pset_bind(2).

     PS_PRIVATE
           The processor set was created  by  pset_create(2)  and
           can  be  modified  by  pset_assign(2)  and  removed by
           pset_destroy(2). LWPs and processes can also be  bound
           to this processor set using pset_bind().

     If numcpus is non-null, then on  successful  completion  the
     number  of processors in the processor set will be stored in
     the location pointed to by numcpus.

     If numcpus and  cpulist  are  both  non-null,  then  cpulist
     points  to  a  buffer where a list of processors assigned to
     the processor set is to be stored, and numcpus points to the
     maximum number of processor IDs the buffer can hold. On suc-
     cessful completion, the list of processors up to the maximum
     buffer size is stored in the buffer pointed to by cpulist.

     If pset is PS_NONE, the list of processors not  assigned  to
     any processor set will be stored in the buffer pointed to by
     cpulist, and the number of such processors will be stored in
     the location pointed to by numcpus.  The location pointed to
     by type will be set to PS_NONE.

     If pset is PS_MYID, the processor list and number of proces-
     sors  returned  will  be those of the processor set to which
     the caller is bound. If the caller is not bound to a proces-
     sor  set,  the  result will be equivalent to setting pset to
     PS_NONE.

RETURN VALUES

     Upon successful completion, 0 is returned. Otherwise, -1  is
     returned and errno is set to indicate the error.

ERRORS

     The pset_info() function will fail if:

     EFAULT
           The location pointed to by type, numcpus,  or  cpulist
           was not null and not writable by the user.

     EINVAL
           An invalid processor set ID was specified.

ATTRIBUTES

     See attributes(5) for descriptions of the  following  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Stable                      |
    |_____________________________|_____________________________|
    | MT-Level                    | Async-Signal-Safe           |
    |_____________________________|_____________________________|

SEE ALSO

     psrinfo(1M), psrset(1M), processor_info(2),  pset_assign(2),
     pset_bind(2),        pset_create(2),        pset_destroy(2),
     pset_getloadavg(3C), attributes(5)