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|Allinea DDT helps developers fix bugs quickly - from the desktop to the largest supercomputer. The most scalable parallel debugger for debugging MPI and multi-threaded codes, DDT leads the world in performance and usability.||
DDT is available through modules
starting the application from inside DDT
Set up the environment
Compile your application
Select the right MPI Implementation in the Options and run your program.
Hazel Hen special
To debug a program with ddt on Hazel Hen you have to use the Reverse Connection feature. Therefore first launch ddt on a login node:
Load the forge module in your job script or interactive job and modify your aprun command line therein
Nec Nehalem Cluster special
If you want to debug a parallel Program using Open MPI with DDT on the NEC Nehalem Cluster select 'OpenMPI (Compatibility)' as the desired MPI Implementation.
Cray XT5m special
If your program does IO take care to start an interactive session from the correct directory.