Table of Contents

HACC_IO

HACC_IO is a IO-performace benchmark. It uses a n-body simmulation, to simulate collisionless fluids in space.

Usage

After downloading and compiling with make CXX=mpicc you can run the benchmark with mpirun -np <number of processes> ./HACC_IO <number of particles> <filename>

Example Output

Here are some example runs:

1 Process 

mpirun -np 1 ./HACC_IO 10000000 mpitest
-------- Aggregate Performance --------
 WRITE Checkpoint Perf: 629.866 BW[MB/s] 405165824 Bytes 0.613458 MaxTime[sec] 
-------- Aggregate Performance --------
 READ Restart Perf: 936.398 BW[MB/s] 405165824 Bytes 0.412641 MaxTime[sec] 
 CONTENTS VERIFIED... Success

4 Processes 

mpirun -np 4 ./HACC_IO 10000000 mpitest
-------- Aggregate Performance --------
 WRITE Checkpoint Perf: 153.236 BW[MB/s] 1545165824 Bytes 9.61643 MaxTime[sec] 
-------- Aggregate Performance --------
 READ Restart Perf: 1292.3 BW[MB/s] 1545165824 Bytes 1.14028 MaxTime[sec] 
 CONTENTS VERIFIED... Success