The PatternIO benchmark is a simple interleaved IO test. It test the ability of the mpi-io implementation to compensate filesystem locks.
Simply compile the benchmark by running make and run it using mpirun.
The output generated by running
./PatternIO
will look something like this:
Startup Proc[0] 10485760 0.1071
The first number is the transfer size in bytes. The seccond one is the number of GB/s