pgtok
ru->ru_ixrss += pgtok(btoc(vm->vm_tsize));
ru->ru_idrss += pgtok(btoc(vm->vm_dsize));
ru->ru_isrss += pgtok(btoc(vm->vm_ssize));
rss = pgtok(vmspace_resident_count(vm));
vmsz = pgtok(vmspace_resident_count(vm));