MUST is a correctness checker for MPI programs. It offers detailed information on possible problems with a piece of code.

This page demonstrates usage on our systems and offers a short tour of some of the functionality – please see the website for more details on the project webpage.

Basic usage

Before using, please execute the following to make the software available:

Optional step, recompile the MPI program with the -g compiler flag (will allow MUST to include source file line information in its output), e.g.

For the simplest method of running the software, an additional MPI process is required to run the correctness checks.

Short, undemanding runs on a login node (here running example_program with 4 MPI ranks):

This should create directories called must_temp , MUST_Output-files and a file called MUST_Output.html in the current working directory. Either view MUST_Output.html on a login node with a web browser, or transfer the files to your desktop first.

It is advisable to delete must_temp , MUST_Output-files and MUST_Output.html before each run of the tool.