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Mpi for heat eqn #215

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Mpi for heat eqn #215

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b420117
Added Heat_Eqn_Parallel
WasimNiyazMunshi Mar 19, 2025
fa1149d
Increased speed of comparison_MPI_vs_step_26.mp4
WasimNiyazMunshi Mar 19, 2025
7e8a9b7
Removed reinitializing of constraints
WasimNiyazMunshi Mar 24, 2025
715b66c
Changed .cc file to perform scaling study
WasimNiyazMunshi Mar 27, 2025
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39 changes: 39 additions & 0 deletions Heat_Eqn_Parallel/CMakeLists.txt
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Original file line number Diff line number Diff line change
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##
# CMake script for the MPI_heat_eqn tutorial program:
##

# Set the name of the project and target:
SET(TARGET "MPI_heat_eqn")

# Declare all source files the target consists of. Here, this is only
# the one step-X.cc file, but as you expand your project you may wish
# to add other source files as well. If your project becomes much larger,
# you may want to either replace the following statement by something like
# FILE(GLOB_RECURSE TARGET_SRC "source/*.cc")
# FILE(GLOB_RECURSE TARGET_INC "include/*.h")
# SET(TARGET_SRC ${TARGET_SRC} ${TARGET_INC})
# or switch altogether to the large project CMakeLists.txt file discussed
# in the "CMake in user projects" page accessible from the "User info"
# page of the documentation.
SET(TARGET_SRC
${TARGET}.cc
)

# Usually, you will not need to modify anything beyond this point...

CMAKE_MINIMUM_REQUIRED(VERSION 3.3.0)

FIND_PACKAGE(deal.II 9.4.0
Comment on lines +24 to +26
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Suggested change
CMAKE_MINIMUM_REQUIRED(VERSION 3.3.0)
FIND_PACKAGE(deal.II 9.4.0
CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
FIND_PACKAGE(deal.II 9.5.0

See #216.

I did not have time to look at the program yet. Just a comment about your CMakeLists.txt.

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This is still relevant.

HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
)
IF(NOT ${deal.II_FOUND})
MESSAGE(FATAL_ERROR "\n"
"*** Could not locate a (sufficiently recent) version of deal.II. ***\n\n"
"You may want to either pass a flag -DDEAL_II_DIR=/path/to/deal.II to cmake\n"
"or set an environment variable \"DEAL_II_DIR\" that contains this path."
)
ENDIF()

DEAL_II_INITIALIZE_CACHED_VARIABLES()
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Before this line, you will want to put a block of code that ensures that deal.II was configured with MPI and PETSc. The following is copied from examples/step-40/CMakeLists.txt, and you may want to adjust as necessary:

#
# Are all dependencies fulfilled?
#
if(NOT ((DEAL_II_WITH_PETSC AND NOT DEAL_II_PETSC_WITH_COMPLEX) OR DEAL_II_WITH_TRILINOS) OR NOT DEAL_II_WITH_P4EST)
  message(FATAL_ERROR "
Error! This tutorial requires a deal.II library that was configured with the following options:
    DEAL_II_WITH_PETSC = ON
    DEAL_II_PETSC_WITH_COMPLEX = OFF
    DEAL_II_WITH_P4EST = ON
or
    DEAL_II_WITH_TRILINOS = ON
    DEAL_II_WITH_P4EST = ON
However, the deal.II library found at ${DEAL_II_PATH} was configured with these options:
    DEAL_II_WITH_PETSC = ${DEAL_II_WITH_PETSC}
    DEAL_II_PETSC_WITH_COMPLEX = ${DEAL_II_PETSC_WITH_COMPLEX}
    DEAL_II_WITH_P4EST = ${DEAL_II_WITH_P4EST}
    DEAL_II_WITH_TRILINOS = ${DEAL_II_WITH_TRILINOS}
This conflicts with the requirements.
One or both of the aforementioned combinations of prerequisites are not met by your installation, but at least one is required for this tutorial step."
    )
endif()

(Note that step-40 can use either PETSc or Trilinos. I don't know whether that's true for your program, so you may have to change the snippet here a bit.)

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For another example, see Distributed_LDG_Method/CMakeLists.txt in the code gallery repository.

PROJECT(${TARGET})
DEAL_II_INVOKE_AUTOPILOT()
Binary file added Heat_Eqn_Parallel/MPI_heat_eqn
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Please remove the executable from the patch.

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