Pipeline Schwarz Waveform relaxation using Charm++

Code can be build using the commands make swr or make pswr from the ./code directory. These commands respectively build a schwarz waveform relaxation executable and a pipeline schwarz waveform executable. A full suite of tests is available in ./code/tests, and can be run using the command make test. Simple SWR and PSWR test cases can be run using the commands make test-swr and make test-pswr. The environment variables PETSC_DIR, PETSC_ARCH, and CHARMC must be set before running make. You must also ensure that LD_LIBRARY_PATH contains the petsc and charm libraries. You may need to build petsc without mpi.

Both executable can be run using the standard charmrun syntax, and accept command line arguments controlling the number of domains, domain size and number of iterations. Pass the --help option to view a list of accepted parameters. Currently, the subdomain time stepping logic (relative number of time steps and time adaptive behavior) is hard coded in the SWRDomain and PSWRDomain classes, and needs to be manually adjusted for different load balancing tests.

The directory ./taub contains a sample qsub script. It expects there to exist a setup.sh script in this directory that set the environment variables described above.