LGRP_PARENTS(3LGRP) Locality Group Library Functions LGRP_PARENTS(3LGRP)

lgrp_parents - get parents of given lgroup

cc [ flag ... ] file... -llgrp [ library ... ]
#include <sys/lgrp_user.h>
int lgrp_parents(lgrp_cookie_t cookie, lgrp_id_t child,

lgrp_id_t *lgrp_array, uint_t lgrp_array_size);

The lgrp_parents() function takes a cookie representing a snapshot of the lgroup hierarchy obtained from lgrp_init(3LGRP) and returns the number of parent lgroups of the specified lgroup. If lgrp_array is non-null and the lgrp_array_size is non-zero, the array is filled with as many of the parent lgroup IDs as will fit given the size of the array. For the root lgroup, the number of parents returned is 0 and the lgrp_array argument is not filled in.

Upon successful completion, lgrp_parents() returns the number of parent lgroup IDs. Otherwise, −1 is returned and errno is set to indicate the error.

The lgrp_parents() function will fail if:


The specified cookie or lgroup ID is not valid.


The specified lgroup ID was not found.

See attributes(7) for descriptions of the following attributes:

Interface Stability Evolving
MT-Level MT-Safe

lgrp_children(3LGRP), lgrp_init(3LGRP), lgrp_nlgrps(3LGRP), liblgrp(3LIB), attributes(7)

April 16, 2003 OmniOS