mpi-cache-bench

A benchmark code to study the impact of CPU caches on MPI communication routines

Compile

Run make to compile the cache_bench executable.

Set the CXX environment variable to point to mpicxx.

Run

The mpi-cache-bench supports only 2 MPI processes. Therefore in order to run the benchmark you need to run the following command:

mpirun -np 2 ./cache_bench 1 8 6M

Where the parameters are respectively:

1. number of sockets in the system
2. total number of cores in the system
3. amount of last level cache for a single CPU