Compile and Run mmult

Prerequisites

You must install all the necessary tools and copied the examples/mmult.* source files as described in Software requirements.

Procedure

1. Compile the code. To compile the C and Fortran versions of the application, run make on the mmult.makefile file.

   make -f mmult.makefile
   

   For the Python version of the application, run make on the mmult-py.makefile to build the C/Fortran compute kernels.

   make -f mmult_py.makefile
   

   The compiler command and compilation options can be set at the top of mmult.makefile and mmult_py.makefile.

2. Run the application. To run the application using eight processes, use:

   • For the C version:

     mpirun -n 8 ./mmult_c
     

   • For the F90 version:

     mpirun -n 8 ./mmult_f
     

   • For the Python version:

     mpirun -n 8 python3 ./mmult.py
     

   Additional arguments can be added to change the size of the matrices, for example 512x512 in C:

   mpirun -n 8 ./mmult_c 512
   

   Note

   By default, the Python version runs the C kernel. To run the F90 kernel, use:

   mpirun -n 8 python3 ./mmult.py -k F90
   

The application crashes with a ‘Segmentation fault’. This is expected behavior. Each example source file provided in this trials package has an intentional bug.

Next Steps

To fix the bug, you must debug the code. Fix the bug with Linaro DDT shows you how to debug the code using Linaro DDT, and then how to fix the bug.