Input Parameters

Most Parthenon behavior is controlled via an input file, generally named parthinput.<problem-name>. Parameters in this file take the form param = value, with a particular type for each parameter set in the Parthenon code.

Parameters are split into blocks, denoted by bracketed names (<blockname>). All Parthenon-specific parameters are in blocks named <parthenon/x>. Below is an incomplete list of some parameters Parthenon accepts, split by block.

<parthenon/job>

General parthenon options such as problem name and parameter handling.

Option	Default	Type	Description
name archive_parameters	none false	string string	Name of this problem or initialization, prefixed to output files. Produce a parameter file containing all parameters known to Parthenon. Set to true for an output file named parthinput.archive. Set to timestamp for a file with a name containing a timestamp.

<parthenon/time>

Options related to time-stepping and printing of diagnostic data.

<parthenon/mesh>

See the Adaptive Mesh Refinement documentation for details of the required parameters in <parthenon/mesh> and <parthenon/meshblock>.

Option	Default	Type	Description
nghost	2	int	Number of ghost cells for each mesh block on each side.

<parthenon/sparse>

See the Sparse implementation documentation for details.

Option	Default	Type	Description
enable_sparse alloc_threshold dealloc_threshold dealloc_count	true 1e-12 1e-14 5	bool float float int	If set to false, sparse variables will always be allocated, see also Run-time Global (for all sparse variables) threshold to trigger allocation of a variable if cells in the receiving ghost cells are above this value. Global (for all sparse variables) threshold to trigger deallocation if all active cells of a variable in a block are below this value. First deallocate a sparse variable if the dealloc_threshold has been met in this number of consecutive cycles.