Try the latest nightly tarball for v3.1.x. Should be fixed. 

> On Jun 16, 2018, at 5:48 PM, Hammond, Simon David via users 
> <users@lists.open-mpi.org> wrote:
> 
> The output from the test in question is:
> 
> Single thread test. Time: 0 s 10182 us 10 nsec/poppush
> Atomics thread finished. Time: 0 s 169028 us 169 nsec/poppush
> <then runs forever>
> 
> S.
> 
> -- 
> Si Hammond
> Scalable Computer Architectures
> Sandia National Laboratories, NM, USA
> [Sent from remote connection, excuse typos]
> 
> 
> On 6/16/18, 5:45 PM, "Hammond, Simon David" <sdha...@sandia.gov> wrote:
> 
>    Hi OpenMPI Team,
> 
>    We have recently updated an install of OpenMPI on POWER9 system 
> (configuration details below). We migrated from OpenMPI 2.1 to OpenMPI 3.1. 
> We seem to have a symptom where code than ran before is now locking up and 
> making no progress, getting stuck in wait-all operations. While I think it's 
> prudent for us to root cause this a little more, I have gone back and rebuilt 
> MPI and re-run the "make check" tests. The opal_fifo test appears to hang 
> forever. I am not sure if this is the cause of our issue but wanted to report 
> that we are seeing this on our system.
> 
>    OpenMPI 3.1.0 Configuration:
> 
>    ./configure 
> --prefix=/home/projects/ppc64le-pwr9-nvidia/openmpi/3.1.0-nomxm/gcc/7.2.0/cuda/9.2.88
>  --with-cuda=$CUDA_ROOT --enable-mpi-java --enable-java 
> --with-lsf=/opt/lsf/10.1 
> --with-lsf-libdir=/opt/lsf/10.1/linux3.10-glibc2.17-ppc64le/lib --with-verbs
> 
>    GCC versions are 7.2.0, built by our team. CUDA is 9.2.88 from NVIDIA for 
> POWER9 (standard download from their website). We enable IBM's JDK 8.0.0.
>    RedHat: Red Hat Enterprise Linux Server release 7.5 (Maipo)
> 
>    Output:
> 
>    make[3]: Entering directory 
> `/home/sdhammo/openmpi/openmpi-3.1.0/test/class'
>    make[4]: Entering directory 
> `/home/sdhammo/openmpi/openmpi-3.1.0/test/class'
>    PASS: ompi_rb_tree
>    PASS: opal_bitmap
>    PASS: opal_hash_table
>    PASS: opal_proc_table
>    PASS: opal_tree
>    PASS: opal_list
>    PASS: opal_value_array
>    PASS: opal_pointer_array
>    PASS: opal_lifo
>    <runs forever>
> 
>    Output from Top:
> 
>    20   0   73280   4224   2560 S 800.0  0.0  17:22.94 lt-opal_fifo
> 
>    -- 
>    Si Hammond
>    Scalable Computer Architectures
>    Sandia National Laboratories, NM, USA
>    [Sent from remote connection, excuse typos]
> 
> 
> 
> 
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