MAPL IO Benchmarks

Introduction

The MAPL library includes several low level IO benchmarks to measure read/write speeds and MPI performance. This will detail the various tests

Raw IO Benchmark

Checkpoint and Restart Simulators

Example Input Files

For checkpoint_simulator.x

NX: 4
NY: 4
IM_WORLD: 90
LM: 137
NUM_WRITERS: 1
NUM_ARRAYS: 5
SPLIT_FILE: .false.
GATHER_3D: .false.
WRITE_BARRIER: .false.
NTRIALS: 2
RANDOM_DATA: .true.
DO_WRITES: .true.

For restart_simulator.x

NX: 4
NY: 4
IM_WORLD: 90
LM: 137
NUM_READERS: 1
NUM_ARRAYS: 5
SPLIT_FILE: .false.
SCATTER_3D: .false.
read_BARRIER: .false.
NTRIALS: 2
DO_READS: .true.

Example Output

For checkpoint_simulator.x

 Summary of run:
Total data volume in megabytes:    126.99509
Num writers:    1
Total cores:      96
Cube size:      90   137
Split file, 3D_gather, chunk, extra, netcdf output, write barrier, do writes:  FFTFTFT
Number of trial:       2
Application  time:    4.1891060
Real throughput MB/s, Std Real throughput MB/s, file system MB/S, std file system MB/s
   902.47152       9.4040515       2244.2126       26.151517
 Trial            1
 Trial            2

For restart_simulator.x

 Summary of run:
Total data volume in megabytes:    126.99509
Num readers:    1
Total cores:      96
Cube size/LM:      90   137
Split file, 3D_scatter, extra, netcdf output, write barrier, do writes:  FFFTFT
Number of trial:       2
Application  time:    3.6086680
Real throughput MB/s, Std Real throughput MB/s, file system MB/S, std file system MB/s
   725.60777       94.535516       1864.8030       85.786595

Benchmarking Using ExtDataDriver.x