Automatic running test

In addition to a running test of the Section 'Test calculation', if you want to check whether most functionalities of OpenMX have been successfully installed on your computer or not, we recommend for you to perform an automatic running test. To do this, you can run OpenMX as follows:

In this parallel running, you can specify other options for mpirun. Then, OpenMX will run with 14 test files, and compare calculated results with the reference results which are stored in 'work/input_example'. The comparison (absolute difference in the total energy and force) is stored in a file 'runtest.result' in the directory 'work'. The reference results were calculated using single processor of a 2.6 GHz Opteron machine. If the difference is within last seven digits, we may consider that the installation is successful. As an example, 'runtest.result' generated by the automatic running test is shown below:

1	input_example/Benzene.dat	Elapsed time(s)= 46.32	diff Utot= 0.000000000001	diff Force= 0.000000000000
2	input_example/C60.dat	Elapsed time(s)= 103.76	diff Utot= 0.000000000002	diff Force= 0.000000000001
3	input_example/CO.dat	Elapsed time(s)= 109.15	diff Utot= 0.000000000000	diff Force= 0.000000000000
4	input_example/Cr2.dat	Elapsed time(s)= 69.06	diff Utot= 0.000000000000	diff Force= 0.000000000000
5	input_example/Crys-MnO.dat	Elapsed time(s)= 135.83	diff Utot= 0.000000000004	diff Force= 0.000000000000
6	input_example/GaAs.dat	Elapsed time(s)= 137.91	diff Utot= 0.000000000000	diff Force= 0.000000000000
7	input_example/Glycine.dat	Elapsed time(s)= 40.18	diff Utot= 0.000000000000	diff Force= 0.000000000000
8	input_example/Graphite4.dat	Elapsed time(s)= 21.02	diff Utot= 0.000000000000	diff Force= 0.000000000000
9	input_example/H2O-EF.dat	Elapsed time(s)= 35.39	diff Utot= 0.000000000000	diff Force= 0.000000000000
10	input_example/H2O.dat	Elapsed time(s)= 41.26	diff Utot= 0.000000000000	diff Force= 0.000000000000
11	input_example/HYb.dat	Elapsed time(s)= 107.79	diff Utot= 0.000000000002	diff Force= 0.000000000000
12	input_example/Methane.dat	Elapsed time(s)= 25.67	diff Utot= 0.000000000003	diff Force= 0.000000002246
13	input_example/Mol_MnO.dat	Elapsed time(s)= 110.44	diff Utot= 0.000000000000	diff Force= 0.000000000000
14	input_example/Ndia2.dat	Elapsed time(s)= 19.52	diff Utot= 0.000000000000	diff Force= 0.000000000000

The comparison was made using 6 processors on the same machine. As you may know, the floating point operation depends on not only computational environment, but also the number of processors used in parallel execution. So we see in above example that there is a small difference even using the same machine. In addition, since two work arrays in OpenMX are allocated as single-precision floating point numbers for saving the size of working memory, the difference between 32 bits and 64 bits machines can be large in this 'runtest'. The elapsed time of each job is also output, so it is helpful for comparison of the computational speed depending on computational environment. In the directory 'work/input_example' you can find 'runtest.result' files generated on several platforms.

If you want to make reference files by yourself, please execute OpenMX as follows:

Then, for *.dat files in 'work/input_example', OpenMX will generate *.out files in 'work/input_example'. So, you can add a new dat file which is used in the next running test. But, please make sure that the previous out files in 'work/input_example' will be overwritten by this procedure. For advanced testers for checking the reliability of code, see also the Sections 'Automatic force tester' and 'Automatic memory leak tester'.