Non-coll Mode

The coll_ucx function can be disabled on Hyper MPI. Instead, the original collective communication of Open MPI can be used. The following command is an example:

mpirun -np 16 -N 2 --hostfile hf --mca coll ^ucx test_case

• -np indicates the total number of processes on all nodes. The calculation formula is as follows: -N x Number of nodes.
• -N indicates the number of processes on each node.
• hf indicates the configuration file of the node where the process is running.
• test_case indicates the binary file compiled by mpicc.