Project.py

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import peano4
import peano4.output.Jinja2TemplatedHeaderImplementationFilePair
 
import dastgen2
 
from .MatrixFreeMain import MatrixFreeMain
 
import os,sys
 
class Project:
  """!
 
  Here we recreate a multigrid project, without using PETSc. 
 
  We keep some of the basic steps:
  - _algorithm_step_create_grid
  - _algorithm_step_enumerate_and_init_solution
  - _algorithm_step_solve
  - _algorithm_step_plot
 
  The rest is yet to be fleshed out.
 
  Now that we have multiple solvers in a project, we may not
  want to use all of them for stopping criteria. Hence, we
  have a second array for solvers which participate, but are
  not asked if their stopping criteria have been reached.
 
  """
 
  """
   The standard extensions that are used for Peano and ExaHyPE.
  """
  LibraryDebug   = "_debug"
  LibraryRelease = ""
  LibraryTrace   = "_trace"
  LibraryAsserts = "_asserts"
  LibraryStats   = "_stats"
 
  def __init__(self, 
               namespace, 
               project_name, 
               directory  = ".",
               executable = "peano4matrixfree",
               subdirectory="",
               abstract_overwrite=True,
               ):
    """!
    
    Create a matrix project
    
    """
    self._project = peano4.Project(namespace, project_name, directory, subdirectory)
    
    # what to do about this line?
    # self._project.output.makefile.add_cmake_core_library("petsc")
    self._subdirectory = subdirectory
    self._abstract_overwrite = abstract_overwrite
 
    # does this get overwritten later?
    self._domain_offset = [0.0, 0.0, 0.0]
    self._domain_size   = [1.0, 1.0, 1.0]
    self._dimensions    = 2
    
    self._load_balancer_name      = ""
    self._load_balancer_arguments = ""
    self._Peano_src_directory = "."
 
    # does this get overwritten later?
    self._build_mode          = peano4.output.CompileMode.Asserts
    self._executable_name = executable
    self._output_path   = "./" 
 
    self._solvers     = []
# @todo remove
    self._aux_solvers = []
 
    self.algorithm_step_create_grid    = peano4.solversteps.Step( "CreateGrid", False )
    self.algorithm_step_init_solution  = peano4.solversteps.Step( "InitSolution", False )
    self.algorithm_step_solve          = peano4.solversteps.Step( "Solve", False )
 
    self.algorithm_step_plot            = peano4.solversteps.Step( "Plot", False )
    
    self.set_global_simulation_parametersset_global_simulation_parameters( dimensions  = 2,
                                           offset      = [0.0, 0.0],
                                           domain_size = [1.0, 1.0],
                                           plot_after_each_mesh_sweep = False,
                                           )
 
 
  def  set_load_balancing(self, load_balancer_name, load_balancer_arguments):
    """!
    
    Set the load balancing scheme
    
    @param load_balancer_name: string
        Should be full-qualified name of the load balancer. 
        By default, I recommend to pass "toolbox::loadbalancing::RecursiveSubdivision"
        
    @param load_balancer_arguments: string
        If your load balancing requires parameters, add them
        here. It is a string that will be copied into the C++ class instantiation. 
        Please add the brackets yourself, i.e. "(3,4,5)" is fine, but "3,4,5" is not. 
        The only exception is the empty parameter list. Here, you can/should simply
        add the empty string.
        
    """
    self._load_balancer_name      = load_balancer_name
    self._load_balancer_arguments = load_balancer_arguments
 
  def set_Peano4_installation(self, src_path, mode=peano4.output.CompileMode.Release ):
    """!
    
    Tell the project where to find Peano
 
    Once we know where to find Peano, we can parse the configuration/makefile
    there and know which compile parameters to use. We also know then where to
    search for the static libraries.
 
    @param src_path: string
      Path (relative or absolute) to the src directory of Peano. This path 
      should hold both the headers (in subdirectories) and all the static
      libraries.
        
    @param mode: peano4.output.CompileMode
 
    """
    self._Peano_src_directory = src_path
    self._build_mode          = mode
 
 
  def __configure_makefile(self):
    """!
    
    Parse makefile of Peano to extract the configuration settings
 
    We parse the configure script's/CMAKE outcome first via parse_configure_script_outcome().
    After that, we set the dimension manually as well as the executable name and 
    the build mode. The values for these parameters step from set_Peano4_installation().
    
    """
    self._project.output.makefile.parse_configure_script_outcome( self._Peano_src_directory )
    self._project.output.makefile.set_dimension(self._dimensions)
    self._project.output.makefile.set_executable_name(self._executable_name)
    self._project.output.makefile.set_mode(self._build_mode)
 
    self.__export_constants__export_constants()
 
  def set_global_simulation_parameters(self,
                                       dimensions,
                                       offset,
                                       domain_size,
                                       plot_after_each_mesh_sweep,
                                       max_iterations=100,
                                       plotter_precision = 5,
                                       ):
    """
    
    Configure global simulation settings
    
    @param offset: [Float]
    
    @param size: [Float]
       should be lists with dimensions double entries.
            
    """
    self._domain_offset      = offset
    self._domain_size        = domain_size
    self._dimensions         = dimensions
    self._plot_after_each_mesh_sweep = plot_after_each_mesh_sweep
    self._max_iterations     = max_iterations
    self._plotter_precision  = plotter_precision
    if plotter_precision<=0:
      raise Exception( "Plotter precision has to be bigger than 0" ) 
 
  def  set_output_path(self,path):
    self._output_path = path
    if not self._output_path.endswith( "/" ):
      self._output_path += "/"
 
       
  def generate_Peano4_project(self, verbose=False):
    """!
 
    Build project
      
    Construct and return the Peano4 project, i.e. all the action sets et al that 
    you require to run this Peano4 application with PETSc. 
     
    """
    self._project.main = MatrixFreeMain(self._project,
                                self._domain_offset,
                                self._domain_size,
                                self._plot_after_each_mesh_sweep,
                                self._max_iterations
                                )
 
    self._project.solversteps.add_step(self.algorithm_step_create_grid)
    self._project.solversteps.add_step(self.algorithm_step_init_solution)
    self._project.solversteps.add_step(self.algorithm_step_solve)
    self._project.solversteps.add_step(self.algorithm_step_plot)
 
    self.__configure_makefile__configure_makefile()
    self.__generate_solver_repository__generate_solver_repository()
 
    self._project.output.readme.add_package_description( """
 
 
""" )
 
    return self._project
 
 
  def __set_solver_repository_dict(self):
      self.dictionary = {}
      self.dictionary[ "SOLVER_INSTANCES"] = [(x.typename(), x.instance_name()) for x in self._solvers ]
      self.dictionary[ "AUX_SOLVER_INSTANCES"] = [(x.typename(), x.instance_name()) for x in self._aux_solvers ]
 
  def __generate_solver_repository(self):
    # make sure solver repository dict is set    
    self.__set_solver_repository_dict__set_solver_repository_dict()
 
    templatefile_prefix = os.path.realpath(__file__).replace( ".pyc", "" ).replace( ".py", "" )
    template_name       = templatefile_prefix + ".SolverRepository.template"
    generated_repository_files = peano4.output.Jinja2TemplatedHeaderImplementationFilePair(
      template_name + ".h",
      template_name + ".cpp",
      "SolverRepository", 
      self._project.namespace, # + ["repositories"],
      self._project.subdirectory + "repositories", 
      self.dictionary,
      True,
      True)
 
    self._project.output.add( generated_repository_files )
    self._project.output.makefile.add_h_file( self._project.subdirectory + "repositories/SolverRepository.h", generated=True )
    self._project.output.makefile.add_cpp_file( self._project.subdirectory + "repositories/SolverRepository.cpp", generated=True )
 
  def add_solver( self, solver, auxiliary=False ):
    """!
    
    Add a new solver
    
    Takes the solver and runs through the individual steps of the algorithm.
    Per step, it tells the solver to inject its particular stuff to the 
    underlying observers.
 
    The auxiliary flag allows us to distinguish the "main" solver from the
    helpers. The rationale for this is that we only want to measure the
    termination conditions for a subset of the solvers.
    
    """  
    print( "---------------------------------------")
    print( "Create data for solver " +solver._name  )
    print( "---------------------------------------")
    print( solver )
 
    solver.add_to_Peano4_datamodel( self._project.datamodel, verbose=False )
 
    solver.add_use_statements(self.algorithm_step_create_grid)
    solver.add_use_statements(self.algorithm_step_init_solution)
    solver.add_use_statements(self.algorithm_step_solve)
    solver.add_use_statements(self.algorithm_step_plot)
 
 
    solver.add_to_create_grid  (self.algorithm_step_create_grid)
    solver.add_to_init_solution(self.algorithm_step_init_solution)
    solver.add_to_solve        (self.algorithm_step_solve)
 
    solver.add_to_plot         (self.algorithm_step_plot)
 
    if self._abstract_overwrite==False:
      solver.add_implementation_files_to_project( self._project.namespace, self._project.output, self._subdirectory, self._abstract_overwrite )
    else:
      solver.add_implementation_files_to_project( self._project.namespace, self._project.output, self._subdirectory )
    
    # @todo das muss raus
    if auxiliary:
      self._aux_solvers.append( solver )
    else:
      self._solvers.append( solver )
 
    pass
 
  def __export_constants(self):
        """!
        
        Export all the constrants of the project into a Configure.h file 
        
        We export ExaHyPE's constants. Besides the constants from ExaHyPE,
        I also export some parameters from Peano onto the ExaHyPE constants
        file. Therefore, it is important that you parse the configure output
        before we export the constants.
        
        """
        self._project.constants.clear()
        offset_string = "{" + str(self._domain_offset[0])
        size_string = "{" + str(self._domain_size[0])
        for i in range(1, self._dimensions):
            offset_string += ","
            size_string += ","
            offset_string += str(self._domain_offset[i])
            size_string += str(self._domain_size[i])
        offset_string += "}"
        size_string += "}"
        self._project.constants.add_include("""#include <bitset>""")
        self._project.constants.add_include("""#include "tarch/la/Vector.h" """)
        self._project.constants.add_include("""#include "peano4/utils/Globals.h" """)
        self._project.constants.export_const_with_type(
            "DomainOffset", offset_string, "tarch::la::Vector<Dimensions,double>"
        )
        self._project.constants.export_const_with_type(
            "DomainSize", size_string, "tarch::la::Vector<Dimensions,double>"
        )
        self._project.constants.export("PlotterPrecision", str(self._plotter_precision))
 
        build_string = "python3 "
        for i in sys.argv:
            build_string += " "
            build_string += i
        self._project.constants.export_string("BuildInformation", build_string)
        self._project.constants.export_string(
            "ConfigureInformation", self._project.output.makefile.configure_call
        )
 
        self._project.output.readme.add_package_description(
            """!
 
### Peano's multigrid extension
 
This is yet to be written, and we need to have a paper on our work.
 
       @article{Reinarz:2020:ExaHyPE,
         title = {ExaHyPE: An engine for parallel dynamically adaptive simulations of wave problems},
         journal = {Computer Physics Communications},
         volume = {254},
         pages = {107251},
         year = {2020},
         issn = {0010-4655},
         doi = {https://doi.org/10.1016/j.cpc.2020.107251},
         url = {https://www.sciencedirect.com/science/article/pii/S001046552030076X},
         author = {Anne Reinarz and Dominic E. Charrier and Michael Bader and Luke Bovard and Michael Dumbser and Kenneth Duru and Francesco Fambri and Alice-Agnes Gabriel and Jean-Matthieu Gallard and Sven K\"oppel and Lukas Krenz and Leonhard Rannabauer and Luciano Rezzolla and Philipp Samfass and Maurizio Tavelli and Tobias Weinzierl},
         keywords = {Hyperbolic, PDE, ADER-DG, Finite volumes, AMR, MPI, TBB, MPI+X},
         abstract = {ExaHyPE (An Exascale Hyperbolic PDE Engine) is a software engine for solving systems of first-order hyperbolic partial differential equations (PDEs). Hyperbolic PDEs are typically derived from the conservation laws of physics and are useful in a wide range of application areas. Applications powered by ExaHyPE can be run on a student's laptop, but are also able to exploit thousands of processor cores on state-of-the-art supercomputers. The engine is able to dynamically increase the accuracy of the simulation using adaptive mesh refinement where required. Due to the robustness and shock capturing abilities of ExaHyPE's numerical methods, users of the engine can simulate linear and non-linear hyperbolic PDEs with very high accuracy. Users can tailor the engine to their particular PDE by specifying evolved quantities, fluxes, and source terms. A complete simulation code for a new hyperbolic PDE can often be realised within a few hours - a task that, traditionally, can take weeks, months, often years for researchers starting from scratch. In this paper, we showcase ExaHyPE's workflow and capabilities through real-world scenarios from our two main application areas: seismology and astrophysics.
           Program summary
           Program title: ExaHyPE-Engine Program Files doi: http://dx.doi.org/10.17632/6sz8h6hnpz.1 Licensing provisions: BSD 3-clause Programming languages: C++, Python, Fortran Nature of Problem: The ExaHyPE PDE engine offers robust algorithms to solve linear and non-linear hyperbolic systems of PDEs written in first order form. The systems may contain both conservative and non-conservative terms. Solution method: ExaHyPE employs the discontinuous Galerkin (DG) method combined with explicit one-step ADER (arbitrary high-order derivative) time-stepping. An a-posteriori limiting approach is applied to the ADER-DG solution, whereby spurious solutions are discarded and recomputed with a robust, patch-based finite volume scheme. ExaHyPE uses dynamical adaptive mesh refinement to enhance the accuracy of the solution around shock waves, complex geometries, and interesting features.
         }
       }
"""
        )
 
        for i in self._solvers:
            self._project.output.readme.add_entry(
                i.create_readme_descriptor()
            )
 
  @property
  def subdirectory(self):
    return self._subdirectory