Handling full-node MPI warnings with MVAPICH 3.0
When running a full-node MPI job with MVAPICH 3.0 , you may encounter the following warning message:
Cardinal
HWloc warning: Failed with: intersection without inclusion
When running MPI+OpenMP hybrid code with the Intel Classic Compiler and MVAPICH 3.0, you may encounter the following warning message from hwloc:
GCC 13 compilation errors due to missing headers
Users may encounter the following errors when compiling a C++ program with GCC 13:
error: 'uint64_t' in namespace 'std' does not name a type
or
HCOLL-related failures in OpenMPI applications
Several applications using OpenMPI, including HDF5, Boost, Rmpi, ORCA, and CP2K, may fail with errors such as
mca_coll_hcoll_module_enable() coll_hcol: mca_coll_hcoll_save_coll_handlers failed
or
Caught signal 11: segmentation fault
We have identified that the issue is related to HCOLL (Hierarchical Collectives) being enabled in OpenMPI.
