Testing last night's master tarball with "make check" I find that opal_lifo *hangs* on every ppc/linux system I try, including both gcc and xlc, both 32- and 64-bit CPUs and even a little-endian POWER8.
Attaching gdb to a hung yields: (gdb) thread apply all bt full Thread 1 (Thread 0xfff9e4f8f30 (LWP 32858)): #0 0x0000000010001778 in check_lifo_consistency (lifo=0xfffde0100b8, expected_count=100) at /home/hargrove/SCRATCH/OMPI/openmpi-master-linux-ppc64-xlc-12.1/openmpi-dev-2014-gc8730b5/test/class/opal_lifo.c:73 item = 0x1003d6a8190 count = 215728334 __func__ = "check_lifo_consistency" #1 0x00000000100022e4 in main (argc=1, argv=0xfffde010688) at /home/hargrove/SCRATCH/OMPI/openmpi-master-linux-ppc64-xlc-12.1/openmpi-dev-2014-gc8730b5/test/class/opal_lifo.c:171 threads = {17590531453408, 17590520967648, 17590510481888, 17590499996128, 17590489510368, 17590479024608, 17590468538848, 17590458053088} item = 0x1003d6a83c0 prev = 0xfffde0100f0 item2 = 0x1003d6a2cf0 start = {tv_sec = 1435767655, tv_usec = 746823} stop = {tv_sec = 1435767667, tv_usec = 450808} total = {tv_sec = 11, tv_usec = 703985} lifo = {super = {obj_magic_id = 16046253926196952813, obj_class = 0xfff9e431fb0, obj_reference_count = 1, cls_init_file_name = 0x10003524 "/home/hargrove/SCRATCH/OMPI/openmpi-master-linux-ppc64-xlc-12.1/openmpi-dev-2014-gc8730b5/test/class/opal_lifo.c", cls_init_lineno = 96}, opal_lifo_head = {data = { counter = 0, item = 0x1003d6a8190}}, opal_lifo_ghost = {super = { obj_magic_id = 16046253926196952813, obj_class = 0xfff9e431e18, obj_reference_count = 1, cls_init_file_name = 0xfff9e36f528 "/home/hargrove/SCRATCH/OMPI/openmpi-master-linux-ppc64-xlc-12.1/openmpi-dev-2014-gc8730b5/opal/class/opal_lifo.c", cls_init_lineno = 27}, opal_list_next = 0xfffde0100f0, opal_list_prev = 0x0, item_free = 1, opal_list_item_refcount = 0, opal_list_item_belong_to = 0x0}} success = false timing = 1.4629981249999999e-06 rc = 0 __func__ = "main" -Paul -- Paul H. Hargrove phhargr...@lbl.gov Computer Languages & Systems Software (CLaSS) Group Computer Science Department Tel: +1-510-495-2352 Lawrence Berkeley National Laboratory Fax: +1-510-486-6900