[mvapich-discuss] MVAPICH2-2.3b hwloc topology issue

[Doug Johnson]

Hi Sourav,

I do not see the problem when using mpirun_rsh, but I do when using
mpiexec hydra.

Doug

Sourav Chakraborty <chakraborty.52 at buckeyemail.osu.edu> writes:

> Hi Doug,
>
> The xml file is created by MVAPICH2 during startup. The error could be due to some permission issue while
> accessing the /tmp directory.
>
> We tried out the same build options with 2.3b on Owens but were not able to reproduce the issue. Please let us
> know if the error persists.
>
> -bash-4.2$ ./bin/mpichversion
> MVAPICH2 Version: 2.3b
> MVAPICH2 Release date: Thu Aug 10 22:00:00 EST 2017
> MVAPICH2 Device: ch3:mrail
> MVAPICH2 configure: --prefix=/users/PZS0622/osc1006/devel/mvapich2/install --enable-shared --with-mpe
> --enable-romio --enable-mpit-pvars=mv2 --disable-option-checking --with-file-system=ufs+nfs+gpfs
> --with-pbs=/opt/torque --with-pbs-lib=/opt/torque/lib64 --with-pbs-include=/opt/torque/include CC=icc CXX=icpc
> FC=ifort
> MVAPICH2 CC: icc -DNDEBUG -DNVALGRIND -O2
> MVAPICH2 CXX: icpc -DNDEBUG -DNVALGRIND -O2
> MVAPICH2 F77: ifort -L/lib -L/lib -O2
> MVAPICH2 FC: ifort -O2
>
> -bash-4.2$ ./bin/mpirun_rsh -np 56 -hostfile $PBS_NODEFILE MV2_HCA_AWARE_PROCESS_MAPPING=0
> ./libexec/osu-micro-benchmarks/mpi/startup/osu_init
> # OSU MPI Init Test v5.3.2
> nprocs: 56, min: 885 ms, max: 934 ms, avg: 905 ms
> -bash-4.2$
>
> Thanks,
> Sourav
>
> On Mon, Nov 27, 2017 at 2:26 PM, Doug Johnson <djohnson at osc.edu> wrote:
>
>  Hi,
>
>  I'm testing 2.3b and have encountered a problem with the new hwloc
>  topology routines in src/mpid/ch3/channels/common/src/affinity/hwloc_bind.c.
>  Simple tests fail to start, hanging due to missing files under /tmp.
>  The strace command shows the following.
>
>  access("/tmp/mv2-hwloc-kvs_28818_0-o0433.ten.osc.edu-6758.xml", F_OK) = -1 ENOENT (No such file or
>  directory)
>
>  The xml file is missing on all the nodes where I'm attempting to launch
>  the job. Are there possibly dependencies that I'm missing for this file
>  to be created successfully? (don't have time to step through the code.)
>
>  I was able to continue my tests successfully by setting
>  MV2_BCAST_HWLOC_TOPOLOGY=0.
>
>  Output from mpichversion looks like the following.
>
>  MVAPICH2 Version: 2.3b
>  MVAPICH2 Release date: Thu Aug 10 22:00:00 EST 2017
>  MVAPICH2 Device: ch3:mrail
>  MVAPICH2 configure: --prefix=/opt/mvapich2/intel/17.0/2.3b --enable-shared --with-mpe --enable-romio
>  --enable-mpit-pvars=mv2 --disable-option-checking --with-file-system=ufs+nfs+gpfs --with-pbs=/opt/torque
>  --with-pbs-lib=/opt/torque/lib64 --with-pbs-include=/opt/torque/include
>  MVAPICH2 CC: icc -DNDEBUG -DNVALGRIND -O2
>  MVAPICH2 CXX: icpc -DNDEBUG -DNVALGRIND -O2
>  MVAPICH2 F77: ifort -L/lib -L/lib -O2
>  MVAPICH2 FC: ifort -O2
>
>  Best,
>  Doug
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