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DDT: Difference between revisions
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(Added simple example and special for DDT + Open MPI on Nehalem Cluster) |
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==== Cray XT5m special ==== | |||
If your program does IO take care to start an interactive session from the correct directory. | |||
Revision as of 11:54, 31 May 2010
| 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. |
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Usage
DDT is available through modules
module load debugger/ddt
Note: Do not forget to compile your application with debugging info (-g option)
Examples
starting the application from inside DDT
Set up the environment
module load debugger/ddt
module load mpi/openmpi
Compile your application
mpicc -g your_app.c -o your_app
Start DDT:
ddt your_app
Select the right MPI Implementation in the Options and run your program.
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.