lgrp_ld
kmem_zalloc(sizeof (struct lgrp_ld *) * (sz + 1), KM_SLEEP);
kmem_free(lpl->lpl_rset, sizeof (struct lgrp_ld *) * sz);
struct lgrp_ld *cpu_lpl; /* pointer to this cpu's load */
struct lgrp_ld *lpl_parent; /* lpl of parent lgrp */
struct lgrp_ld **lpl_rset; /* leaf lpls for lgrp */
struct lgrp_ld *t_lpl; /* load average for home lgroup */