pset_destroy(2) 						System Calls Manual						   pset_destroy(2)

NAME

       pset_destroy() - destroy a processor set

SYNOPSIS

DESCRIPTION

       The  function destroys the processor set pset, releasing all constituent processors and processes by default.  The processors and processes
       are reassigned to the system default processor set.  Once destroyed, the pset identifier becomes available for new processor sets that  may
       be created in the future.

       The  behavior when attempting to destroy a non-empty processor set may be controlled by changing the attribute of the processor set through
       the function.  See pset_getattr(2).  The following values are supported for the attribute:

       Reassign all processors in the
		      pset to the system default processor set.  Migrate all threads and processes bound to the pset to the system default proces-
		      sor set.

       Make the request fail with
		      if there are any threads or processes bound to pset or if there are processors assigned to the pset.

       Make the request fail with
		      only  if	there are active threads or processes bound to the processor set.  Otherwise, perform the operation by reassigning
		      the processors in the pset to the system default processor set.

       If the threads and processes being reassigned to the default processor set have some binding to a processor or a  locality  domain  in  the
       pset being destroyed, their binding is reassigned to a processor or a locality domain in the system default processor set.

       A user with the privilege or a user with WRITE permission on the pset may destroy the processor set pset.  The system default processor set
       may never be destroyed.

   Security Restrictions
       Some or all of the actions associated with this system call require the privilege.  Processes owned by the superuser have  this	privilege.
       Processes  owned  by  other users may have this privilege, depending on system configuration.  See privileges(5) for more information about
       privileged access on systems that support fine-grained privileges.

   Note on Logical Processor and Hyper-Threading Feature
       On systems with the Hyper-Threading (HT) feature enabled at the firmware level, each processor core may have more than one hyper-thread per
       physical processor core.  Each hyper-thread is represented to the operating system and applications as a logical processor (LCPU).

       Due  to	the  processor set contract, which specifies that applications bound to a processor set have complete and exclusive control of all
       processor cores within that processor set, migration of processors between two processor sets is done at the processor core granularity.

       For destruction of a processor set migrates a set of processor cores to the default processor set.  Depending on the source  processor  set
       and the default processor set's the number of logical processors visible to the users and applications may change.

EXAMPLES

       Destroy a processor set with the processor set ID of pset.

RETURN VALUE

       returns zero on successful completion.  Otherwise, -1 is returned and is set to indicate the error.

ERRORS

       fails if one or more of the following is true:

       The attribute value for the processor set does not allow
		    deletion of a non-empty processor set.

       The operation was interrupted.

       pset	    is not a valid processor set.

       The processor set functionality is not supported by the
		    underlying HP-UX version.

       The user does not have necessary permissions to destroy a
		    processor set or the system default processor set was specified.

SEE ALSO

       psrset(1M), pset_assign(2), pset_bind(2), pset_create(2), pset_ctl(2), pset_getattr(2), privgrp(4), privileges(5).

																   pset_destroy(2)