Bug in MPI installation in HPC SDK 20.11?

Accelerated Computing HPC Compilers nvc, nvc++ and nvfortran
1

When I try a simple mpif90 compilation with MPI bundled with Nvidia HPC SDK 20.11, I get

/opt/nvidia-20.11/hpc_sdk/Linux_x86_64/20.11/comm_libs/openmpi/openmpi-3.1.5/bin/.bin/mpif90: error while loading shared libraries: librdmacm.so.1: cannot open shared object file: No such file or directory

In /opt/nvidia-20.11/hpc_sdk/Linux_x86_64/20.11/comm_libs/mpi/lib, ‘ll | wc’ responds with 58 lines and librdmacm* is not there.

In the installation tarball in install_components/Linux_x86_64/20.11/comm_libs/mpi/lib, ‘ll | wc’ responds with 64 lines and librdmacm* (and libibverbs*) are there.

When I copy the missing files to the lib directory of MPI from the tarball by hand, mpif90 can compile my source.

With Intel(R) Core™ i9-9920X CPU @ 3.50GHz (i9 Skylake-X generation), the response to mpif90 in case of incomplete lib directory was different:

/opt/nvidia-20.11/hpc_sdk/Linux_x86_64/20.11/comm_libs/openmpi/openmpi-3.1.5/lib/libopen-pal.so.40: undefined reference to rdma_get_src_port@RDMACM_1.0
/opt/nvidia-20.11/hpc_sdk/Linux_x86_64/20.11/comm_libs/openmpi/openmpi-3.1.5/lib/libopen-pal.so.40: undefined reference to rdma_get_dst_port@RDMACM_1.0

and also disappeared after completing the libraries by hand.

Did I miss something during the installation, or did I make other mistake?

2

Hi lahan,

Appologies for the late response. The person I needed to ask about this was on vacation until today.

It does appear that we missed shipping librdmacm with the 20.11 package so we have opened a problem report (TPR #29418) to get it resolved.

In the meantime, you can install OFED separately from Index of /OFED which will include these libraries.

-Mat

3

Hi,

I think I have a similar issue because when I try to compile with mpif90 I get:

/opt/nvidia/hpc_sdk/Linux_x86_64/20.11/comm_libs/openmpi4/openmpi-4.0.5/bin/.bin/mpif90: error while loading shared libraries: libucp.so.0: cannot open shared object file: No such file or directory

Or:

/opt/nvidia/hpc_sdk/Linux_x86_64/20.11/comm_libs/openmpi/openmpi-3.1.5/bin/.bin/mpif90: error while loading shared libraries: libnvcpumath.so: cannot open shared object file: No such file or directory

Can you help me? Thank you

Anne

4

Hi Anne,

Did you install OFED from the link above? libucp.so should be part of that package.

Note that if you did install OFED but installed it in a non-standard directory, you may need to set your environment’s LD_LIBRARY_PATH to include the installation directory of the libraries.

For “libnvcpumath.so”, this library is located with the compilers in the “/opt/nvidia/hpc_sdk/Linux_x86_64/20.11/compilers/lib” directory. Please add this path to your LD_LIBRARY_PATH.

-Mat

5

Sorry for the late response. Indeed, I forget to add this path to my LD_LIBRARY_PATH… It works now, thank you!

Anne