I think I see the issue. Looks like there is a missing memory barrier after the head consistency code. I will add one and see if that fixes your problem.
BTW, I can't reproduce the issue on any of my systems :-/. -Nathan On Thu, Feb 12, 2015 at 02:07:08AM -0800, Paul Hargrove wrote: > Just experienced the same failure as below with openmpi-dev-904-g08dceda > build with "gcc (GCC) 4.8.2 20140120 (Red Hat 4.8.2-16)" on Scientific > Linux 7.x (a RHEL 7 clone). > gdb says: > Program received signal SIGSEGV, Segmentation fault. > [Switching to Thread 0x7ffff53b0700 (LWP 19685)] > 0x0000000000401417 in opal_fifo_pop_atomic (fifo=0x7fffffffe130) > at > > /home/phargrov/OMPI/openmpi-master-linux-x86_64-sl7x/openmpi-dev-904-g08dceda/opal/class/opal_fifo.h:127 > 127 next = (opal_list_item_t *) item->opal_list_next; > -Paul > On Fri, Feb 6, 2015 at 4:22 PM, Paul Hargrove <phhargr...@lbl.gov> wrote: > > Yes, this time I really mean "fifo", not "lifo". ;-) > With last night's master tarball (Open MPI dev-845-ga3275aa) configured > with only --prefix and --enable-debug > A Linux-86-64 system running debian Wheezy and compiler = "gcc (Debian > 4.7.2-5) 4.7.2" > Failure from "make check": > > /home/phargrov/OMPI/openmpi-master-linux-x86_64-wheezy/openmpi-dev-845-ga3275aa/config/test-driver: > line 95: 3697 Segmentation fault "$@" > $log_file 2>&1 > FAIL: opal_fifo > Manual run shows: > $ ./test/class/opal_fifo > Single thread test. Time: 0 s 33534 us 33 nsec/poppush > Atomics thread finished. Time: 0 s 82289 us 82 nsec/poppush > Atomics thread finished. Time: 4 s 844299 us 4844 nsec/poppush > Atomics thread finished. Time: 5 s 27642 us 5027 nsec/poppush > Atomics thread finished. Time: 5 s 65829 us 5065 nsec/poppush > Atomics thread finished. Time: 5 s 264239 us 5264 nsec/poppush > Atomics thread finished. Time: 5 s 432407 us 5432 nsec/poppush > Atomics thread finished. Time: 5 s 462913 us 5462 nsec/poppush > Atomics thread finished. Time: 5 s 466208 us 5466 nsec/poppush > Atomics thread finished. Time: 5 s 485575 us 5485 nsec/poppush > All threads finished. Thread count: 8 Time: 5 s 485844 us 685 > nsec/poppush > Segmentation fault (core dumped) > When run within GDB: > Program received signal SIGSEGV, Segmentation fault. > [Switching to Thread 0x7ffff5c64700 (LWP 3948)] > 0x0000000000401568 in opal_fifo_pop_atomic (fifo=0x7fffffffe830) > at > > /home/phargrov/OMPI/openmpi-master-linux-x86_64-wheezy/openmpi-dev-845-ga3275aa/opal/class/opal_fifo.h:127 > 127 next = (opal_list_item_t *) item->opal_list_next; > (gdb) print item > $1 = (opal_list_item_t *) 0x0 > (gdb) where > #0 0x0000000000401568 in opal_fifo_pop_atomic (fifo=0x7fffffffe830) > at > > /home/phargrov/OMPI/openmpi-master-linux-x86_64-wheezy/openmpi-dev-845-ga3275aa/opal/class/opal_fifo.h:127 > #1 0x000000000040193d in thread_test_exhaust (arg=0x7fffffffe830) > at > > /home/phargrov/OMPI/openmpi-master-linux-x86_64-wheezy/openmpi-dev-845-ga3275aa/test/class/opal_fifo.c:79 > #2 0x00007ffff6ff9b50 in start_thread () from > /lib/x86_64-linux-gnu/libpthread.so.0 > #3 0x00007ffff6d4370d in clone () from /lib/x86_64-linux-gnu/libc.so.6 > #4 0x0000000000000000 in ?? () > -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 > > -- > 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 > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2015/02/16975.php
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