Compare commits
105 changed files with 3505 additions and 11292 deletions
123
CLANG_default.mk
123
CLANG_default.mk
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@ -1,123 +0,0 @@
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# Basic Defintions for using GNU-compiler suite sequentially
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# requires setting of COMPILER=CLANG_
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#CLANGPATH=//usr/lib/llvm-10/bin/
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CC = ${CLANGPATH}clang
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CXX = ${CLANGPATH}clang++
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#CXX = ${CLANGPATH}clang++ -lomptarget -fopenmp-targets=nvptx64-nvidia-cuda --cuda-path=/opt/pgi/linux86-64/2017/cuda/8.0
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#F77 = gfortran
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LINKER = ${CXX}
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#http://clang.llvm.org/docs/UsersManual.html#options-to-control-error-and-warning-messages
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WARNINGS += -Weverything -Wno-c++98-compat -Wno-sign-conversion -Wno-date-time -Wno-shorten-64-to-32 -Wno-padded -ferror-limit=1
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WARNINGS += -Wdocumentation -Wconversion -Wshadow -Wfloat-conversion -pedantic
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#-fsyntax-only -Wdocumentation -Wconversion -Wshadow -Wfloat-conversion -pedantic
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CXXFLAGS += -O3 -std=c++17 -ferror-limit=1 ${WARNINGS}
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# don't use -Ofast
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# -ftrapv
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LINKFLAGS += -O3
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# different libraries in Ubuntu or manajaró
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ifndef UBUNTU
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UBUNTU=1
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endif
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# BLAS, LAPACK
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LINKFLAGS += -llapack -lblas
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# -lopenblas
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ifeq ($(UBUNTU),1)
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# ubuntu
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else
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# on archlinux
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LINKFLAGS += -lcblas
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endif
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# interprocedural optimization
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CXXFLAGS += -flto
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LINKFLAGS += -flto
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# very good check
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# http://clang.llvm.org/extra/clang-tidy/
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# good check, see: http://llvm.org/docs/CodingStandards.html#include-style
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SWITCH_OFF=,-readability-magic-numbers,-readability-redundant-control-flow,-readability-redundant-member-init
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SWITCH_OFF+=,-readability-redundant-member-init,-readability-isolate-declaration
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#READABILITY=,readability*${SWITCH_OFF}
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#TIDYFLAGS = -checks=llvm-*,-llvm-header-guard -header-filter=.* -enable-check-profile -extra-arg="-std=c++17" -extra-arg="-fopenmp"
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TIDYFLAGS = -checks=llvm-*,-llvm-header-guard${READABILITY} -header-filter=.* -enable-check-profile -extra-arg="-std=c++17" -extra-arg="-fopenmp"
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#TIDYFLAGS += -checks='modernize*
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# ???
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#TIDYFLAGS = -checks='cert*' -header-filter=.*
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# MPI checks ??
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#TIDYFLAGS = -checks='mpi*'
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# ??
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#TIDYFLAGS = -checks='performance*' -header-filter=.*
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#TIDYFLAGS = -checks='portability-*' -header-filter=.*
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#TIDYFLAGS = -checks='readability-*' -header-filter=.*
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default: ${PROGRAM}
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${PROGRAM}: ${OBJECTS}
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$(LINKER) $^ ${LINKFLAGS} -o $@
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clean:
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@rm -f ${PROGRAM} ${OBJECTS}
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clean_all:: clean
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@rm -f *_ *~ *.bak *.log *.out *.tar
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codecheck: tidy_check
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tidy_check:
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clang-tidy ${SOURCES} ${TIDYFLAGS} -- ${SOURCES}
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# see also http://clang-developers.42468.n3.nabble.com/Error-while-trying-to-load-a-compilation-database-td4049722.html
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run: clean ${PROGRAM}
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# time ./${PROGRAM} ${PARAMS}
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./${PROGRAM} ${PARAMS}
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# tar the current directory
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MY_DIR = `basename ${PWD}`
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tar: clean_all
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@echo "Tar the directory: " ${MY_DIR}
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@cd .. ;\
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tar cf ${MY_DIR}.tar ${MY_DIR} *default.mk ;\
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cd ${MY_DIR}
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# tar cf `basename ${PWD}`.tar *
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doc:
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doxygen Doxyfile
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#########################################################################
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.cpp.o:
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$(CXX) -c $(CXXFLAGS) -o $@ $<
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.c.o:
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$(CC) -c $(CFLAGS) -o $@ $<
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.f.o:
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$(F77) -c $(FFLAGS) -o $@ $<
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##################################################################################################
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# some tools
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# Cache behaviour (CXXFLAGS += -g tracks down to source lines; no -pg in linkflags)
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cache: ${PROGRAM}
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valgrind --tool=callgrind --simulate-cache=yes ./$^ ${PARAMS}
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# kcachegrind callgrind.out.<pid> &
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kcachegrind `ls -1tr callgrind.out.* |tail -1`
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# Check for wrong memory accesses, memory leaks, ...
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# use smaller data sets
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mem: ${PROGRAM}
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valgrind -v --leak-check=yes --tool=memcheck --undef-value-errors=yes --track-origins=yes --log-file=$^.addr.out --show-reachable=yes ./$^ ${PARAMS}
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# Simple run time profiling of your code
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# CXXFLAGS += -g -pg
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# LINKFLAGS += -pg
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prof: ${PROGRAM}
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perf record ./$^ ${PARAMS}
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perf report
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# gprof -b ./$^ > gp.out
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# kprof -f gp.out -p gprof &
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codecheck: tidy_check
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196
GCC_default.mk
196
GCC_default.mk
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@ -1,196 +0,0 @@
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# Basic Defintions for using GNU-compiler suite sequentially
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# requires setting of COMPILER=GCC_
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CC = gcc
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CXX = g++
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F77 = gfortran
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LINKER = ${CXX}
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WARNINGS = -Wall -pedantic -Wextra -Weffc++ -Woverloaded-virtual -Wfloat-equal -Wshadow \
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-Wredundant-decls -fmax-errors=1
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# -Wunreachable-code -Winline
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CXXFLAGS += -ffast-math -O3 -march=native -std=c++17 ${WARNINGS}
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#CXXFLAGS += -Ofast -funroll-all-loops -std=c++17 ${WARNINGS}
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#-msse3
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# -ftree-vectorizer-verbose=2 -DNDEBUG
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# -ftree-vectorizer-verbose=5
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# -ftree-vectorize -fdump-tree-vect-blocks=foo.dump -fdump-tree-pre=stderr
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# CFLAGS = -ffast-math -O3 -DNDEBUG -msse3 -fopenmp -fdump-tree-vect-details
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# CFLAGS = -ffast-math -O3 -funroll-loops -DNDEBUG -msse3 -fopenmp -ftree-vectorizer-verbose=2
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# #CFLAGS = -ffast-math -O3 -DNDEBUG -msse3 -fopenmp
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# FFLAGS = -ffast-math -O3 -DNDEBUG -msse3 -fopenmp
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# LFLAGS = -ffast-math -O3 -DNDEBUG -msse3 -fopenmp
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LINKFLAGS += -O3
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#architecture
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#CPU = -march=znver2
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CXXFLAGS += ${CPU}
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LINKFLAGS += ${CPU}
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# different libraries in Ubuntu or manajaró
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ifndef UBUNTU
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UBUNTU=1
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endif
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# BLAS, LAPACK
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ifeq ($(UBUNTU),1)
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LINKFLAGS += -llapack -lblas
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# -lopenblas
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else
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# on archlinux
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LINKFLAGS += -llapack -lopenblas -lcblas
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endif
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# interprocedural optimization
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#CXXFLAGS += -flto
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#LINKFLAGS += -flto
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# for debugging purpose (save code)
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# -fsanitize=leak # only one out the three can be used
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# -fsanitize=address
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# -fsanitize=thread
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SANITARY = -fsanitize=address -fsanitize=undefined -fsanitize=null -fsanitize=return \
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-fsanitize=bounds -fsanitize=alignment -fsanitize=float-divide-by-zero -fsanitize=float-cast-overflow \
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-fsanitize=bool -fsanitize=enum -fsanitize=vptr
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#CXXFLAGS += ${SANITARY}
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#LINKFLAGS += ${SANITARY}
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# profiling tools
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#CXXFLAGS += -pg
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#LINKFLAGS += -pg
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default: ${PROGRAM}
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${PROGRAM}: ${OBJECTS}
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$(LINKER) $^ ${LINKFLAGS} -o $@
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clean:
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@rm -f ${PROGRAM} ${OBJECTS}
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clean_all:: clean
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-@rm -f *_ *~ *.bak *.log *.out *.tar *.orig *.optrpt
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-@rm -rf html
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run: clean ${PROGRAM}
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#run: ${PROGRAM}
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# time ./${PROGRAM} ${PARAMS}
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./${PROGRAM} ${PARAMS}
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# tar the current directory
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MY_DIR = `basename ${PWD}`
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tar: clean_all
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@echo "Tar the directory: " ${MY_DIR}
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@cd .. ;\
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tar cf ${MY_DIR}.tar ${MY_DIR} *default.mk ;\
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cd ${MY_DIR}
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# tar cf `basename ${PWD}`.tar *
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#find . -size +10M > large_files
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#--exclude-from ${MY_DIR}/large_files
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zip: clean
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@echo "Zip the directory: " ${MY_DIR}
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@cd .. ;\
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zip -r ${MY_DIR}.zip ${MY_DIR} *default.mk ;\
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cd ${MY_DIR}
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doc:
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doxygen Doxyfile
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#########################################################################
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.SUFFIXES: .f90
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.cpp.o:
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$(CXX) -c $(CXXFLAGS) -o $@ $<
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# $(CXX) -c $(CXXFLAGS) -o $@ $< 2>&1 | tee -a $<.log
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# $(CXX) -c $(CXXFLAGS) -o $@ $< 2>&1 | tee -a $(<:.cpp=.log)
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.c.o:
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$(CC) -c $(CFLAGS) -o $@ $<
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.f.o:
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$(F77) -c $(FFLAGS) -o $@ $<
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.f90.o:
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$(F77) -c $(FFLAGS) -o $@ $<
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##################################################################################################
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# some tools
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# Cache behaviour (CXXFLAGS += -g tracks down to source lines; no -pg in linkflags)
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cache: ${PROGRAM}
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valgrind --tool=callgrind --simulate-cache=yes ./$^ ${PARAMS}
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# kcachegrind callgrind.out.<pid> &
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kcachegrind `ls -1tr callgrind.out.* |tail -1`
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# Check for wrong memory accesses, memory leaks, ...
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||||
# use smaller data sets
|
||||
# no "-pg" in compile/link options
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mem: ${PROGRAM}
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valgrind -v --leak-check=yes --tool=memcheck --undef-value-errors=yes --track-origins=yes --log-file=$^.addr.out --show-reachable=yes ./$^ ${PARAMS}
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# Graphical interface
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# valkyrie
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# Simple run time profiling of your code
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CXXFLAGS += -g -pg
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LINKFLAGS += -pg
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prof: ${PROGRAM}
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./$^ ${PARAMS}
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gprof -b ./$^ > gp.out
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# kprof -f gp.out -p gprof &
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# sudo apt install gprofng-gui
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# https://parallel.computer/presentations/PPoPP2023/2023-Ruud-Slides.pdf
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# read §3 in https://sourceware.org/binutils/docs/gprofng.html
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# /usr/bin/gp-collect-app -o test.1.er -p on -S on /home/ghaase/Lectures/Math2CPP/Codes/seq/jacobi_oo_stl/main.GCC_
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prof2: ${PROGRAM}
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gprofng collect app -h auto ./$^ ${PARAMS}
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# gprofng display text -functions `ls -1tdr test.*.er |tail -1`
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gprofng display text -script gprofng_script2 `ls -1tdr test.*.er |tail -1`
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# gprofng display text -script gprofng_script2 test.*.er
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# gprofng display gui &
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prof3: ${PROGRAM}
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perf record ./$^ ${PARAMS}
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perf report
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# perf in Ubuntu 20.04: https://www.howtoforge.com/how-to-install-perf-performance-analysis-tool-on-ubuntu-20-04/
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# * install
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# * sudo vi /etc/sysctl.conf
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# add kernel.perf_event_paranoid = 0
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#Trace your heap:
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#> heaptrack ./main.GCC_
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#> heaptrack_gui heaptrack.main.GCC_.<pid>.gz
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heap: ${PROGRAM}
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heaptrack ./$^ ${PARAMS}
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heaptrack_gui `ls -1tr heaptrack.$^.* |tail -1` &
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codecheck: $(SOURCES)
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cppcheck --enable=all --inconclusive --std=c++17 --suppress=missingIncludeSystem $^
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########################################################################
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# get the detailed status of all optimization flags
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info:
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echo "detailed status of all optimization flags"
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$(CXX) --version
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$(CXX) -Q $(CXXFLAGS) --help=optimizers
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lscpu
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inxi -C
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lstopo
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# Excellent hardware info
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# hardinfo
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# Life monitoring of CPU frequency etc.
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# sudo i7z
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# Memory consumption
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# vmstat -at -SM 3
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# xfce4-taskmanager
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||||
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||||
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# https://www.tecmint.com/check-linux-cpu-information/
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#https://www.tecmint.com/monitor-cpu-and-gpu-temperature-in-ubuntu/
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|
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# Debugging:
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# https://wiki.archlinux.org/index.php/Debugging
|
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30
cpp_workspace/ex5/ex5_1/Makefile
Normal file
30
cpp_workspace/ex5/ex5_1/Makefile
Normal file
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@ -0,0 +1,30 @@
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#
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# use GNU-Compiler tools
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COMPILER=GCC_
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# alternatively from the shell
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# export COMPILER=GCC_
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# or, alternatively from the shell
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# make COMPILER=GCC_
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# use Intel compilers
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#COMPILER=ICC_
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# use PGI compilers
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# COMPILER=PGI_
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SOURCES = main.cpp mylib.cpp
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OBJECTS = $(SOURCES:.cpp=.o)
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PROGRAM = main.${COMPILER}
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|
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# uncomment the next to lines for debugging and detailed performance analysis
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CXXFLAGS += -g
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LINKFLAGS += -g
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# do not use -pg with PGI compilers
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ifndef COMPILER
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COMPILER=GCC_
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endif
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include ../${COMPILER}default.mk
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99
cpp_workspace/ex5/ex5_1/check_env.h
Normal file
99
cpp_workspace/ex5/ex5_1/check_env.h
Normal file
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@ -0,0 +1,99 @@
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#pragma once
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|
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#include <iostream>
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#ifdef _OPENMP
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#include <omp.h>
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#endif
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#include <unordered_map>
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|
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//#####################################
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||||
// G.Haase
|
||||
// See https://sourceforge.net/p/predef/wiki/Compilers/
|
||||
// http://www.cplusplus.com/doc/tutorial/preprocessor/
|
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// also: export OMP_DISPLAY_ENV=VERBOSE
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||||
//#####################################
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||||
/** Checks for compilers, its versions, threads etc.
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||||
*
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||||
@param[in] argc number of command line arguemnts
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@param[in] argv command line arguments as array of C-strings
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*/
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template <class T>
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void check_env(T argc, char const *argv[])
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||||
{
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std::cout << "\n#######################################################################\n";
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||||
std::cout << "Code :";
|
||||
for (T k = 0; k < argc; ++k) std::cout << " " << argv[k];
|
||||
std::cout << std::endl;
|
||||
|
||||
// compiler: https://sourceforge.net/p/predef/wiki/Compilers/
|
||||
std::cout << "Compiler: ";
|
||||
#if defined __INTEL_COMPILER
|
||||
#pragma message(" ########## INTEL ###############")
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||||
std::cout << "INTEL " << __INTEL_COMPILER;
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||||
// Ignore warnings for #pragma acc unrecognice
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||||
#pragma warning disable 161
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||||
// Ignore warnings for #pragma omp unrecognice
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||||
#pragma warning disable 3180
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||||
|
||||
#elif defined __PGI
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||||
#pragma message(" ########## PGI ###############")
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||||
std::cout << "PGI " << __PGIC__ << "." << __PGIC_MINOR__ << "." << __PGIC_PATCHLEVEL__;
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||||
#elif defined __clang__
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||||
#pragma message(" ########## CLANG ###############")
|
||||
std::cout << "CLANG " << __clang_major__ << "." << __clang_minor__ << "."; // << __clang_patchlevel__;
|
||||
#elif defined __GNUC__
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||||
#pragma message(" ########## Gnu ###############")
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||||
std::cout << "Gnu " << __GNUC__ << "." << __GNUC_MINOR__ << "." << __GNUC_PATCHLEVEL__;
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||||
#else
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||||
#pragma message(" ########## unknown Compiler ###############")
|
||||
std::cout << "unknown";
|
||||
#endif
|
||||
std::cout << " C++ standard: " << __cplusplus << std::endl;
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||||
|
||||
// Parallel environments
|
||||
std::cout << "Parallel: ";
|
||||
#if defined MPI_VERSION
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||||
#pragma message(" ########## MPI ###############")
|
||||
#ifdef OPEN_MPI
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||||
std::cout << "OpenMPI ";
|
||||
#else
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||||
std::cout << "MPI ";
|
||||
#endif
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||||
std::cout << MPI_VERSION << "." << MPI_SUBVERSION << " ";
|
||||
#endif
|
||||
|
||||
#ifdef _OPENMP
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||||
//https://www.openmp.org/specifications/
|
||||
//https://stackoverflow.com/questions/1304363/how-to-check-the-version-of-openmp-on-linux
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||||
std::unordered_map<unsigned, std::string> const map{
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{200505, "2.5"}, {200805, "3.0"}, {201107, "3.1"}, {201307, "4.0"}, {201511, "4.5"}, {201611, "5.0"}, {201811, "5.0"}};
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||||
#pragma message(" ########## OPENMP ###############")
|
||||
//std::cout << _OPENMP;
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||||
std::cout << "OpenMP ";
|
||||
try {
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||||
std::cout << map.at(_OPENMP);
|
||||
}
|
||||
catch (...) {
|
||||
std::cout << _OPENMP;
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||||
}
|
||||
#pragma omp parallel
|
||||
{
|
||||
#pragma omp master
|
||||
{
|
||||
const int nn = omp_get_num_threads(); // OpenMP
|
||||
std::cout << " ---> " << nn << " Threads ";
|
||||
}
|
||||
#pragma omp barrier
|
||||
}
|
||||
|
||||
#endif
|
||||
#ifdef _OPENACC
|
||||
#pragma message(" ########## OPENACC ###############")
|
||||
std::cout << "OpenACC ";
|
||||
#endif
|
||||
std::cout << std::endl;
|
||||
std::cout << "Date : " << __DATE__ << " " << __TIME__;
|
||||
std::cout << "\n#######################################################################\n";
|
||||
}
|
||||
// HG
|
||||
|
||||
142
cpp_workspace/ex5/ex5_1/main.cpp
Normal file
142
cpp_workspace/ex5/ex5_1/main.cpp
Normal file
|
|
@ -0,0 +1,142 @@
|
|||
#include "check_env.h"
|
||||
#include "mylib.h"
|
||||
#include <cstdlib> // atoi()
|
||||
#include <cstring> // strncmp()
|
||||
#include <ctime>
|
||||
#include <iostream>
|
||||
#include <omp.h> // OpenMP
|
||||
#include <sstream>
|
||||
#include <string>
|
||||
using namespace std;
|
||||
|
||||
int main(int argc, char const *argv[])
|
||||
{
|
||||
omp_set_schedule(omp_sched_static, 2000000);
|
||||
//omp_set_schedule(omp_sched_dynamic, 1000000);
|
||||
//omp_set_schedule(omp_sched_guided, 1000000);
|
||||
//omp_set_schedule(omp_sched_auto, 1); // chunk size does not matter for auto
|
||||
|
||||
|
||||
// Speedup for different number of cores (incl. hyperthreading)
|
||||
omp_set_num_threads(8);
|
||||
|
||||
// Print number of available processors
|
||||
cout << "Number of available processors: " << omp_get_num_procs() << endl;
|
||||
|
||||
// Currently executing parallel code? -> no
|
||||
cout << "Currently in parallel? " << omp_in_parallel() << endl;
|
||||
|
||||
|
||||
int const NLOOPS = 10; // chose a value such that the benchmark runs at least 10 sec.
|
||||
unsigned int N = 500000001;
|
||||
|
||||
|
||||
//##########################################################################
|
||||
// Read Parameter from command line (C++ style)
|
||||
cout << "Checking command line parameters for: -n <number> " << endl;
|
||||
for (int i = 1; i < argc; i++)
|
||||
{
|
||||
cout << " arg[" << i << "] = " << argv[i] << endl;
|
||||
string ss(argv[i]);
|
||||
if ("-n"==ss && i + 1 < argc) // found "-n" followed by another parameter
|
||||
{
|
||||
N = static_cast<unsigned int>(atoi(argv[i + 1]));
|
||||
}
|
||||
else
|
||||
{
|
||||
cout << "Corect call: " << argv[0] << " -n <number>\n";
|
||||
}
|
||||
}
|
||||
|
||||
cout << "\nN = " << N << endl;
|
||||
|
||||
check_env(argc, argv);
|
||||
//########################################################################
|
||||
int nthreads; // OpenMP
|
||||
#pragma omp parallel default(none) shared(cout,nthreads)
|
||||
{
|
||||
stringstream inparallel;
|
||||
inparallel << "Currently in parallel? " << omp_in_parallel() << endl;
|
||||
|
||||
|
||||
int const th_id = omp_get_thread_num(); // OpenMP
|
||||
int const nthrds = omp_get_num_threads(); // OpenMP
|
||||
stringstream ss;
|
||||
ss << "C++: Hello World from thread " << th_id << " / " << nthrds << endl;
|
||||
#pragma omp critical
|
||||
{
|
||||
cout << ss.str(); // output to a shared ressource
|
||||
cout << inparallel.str() << endl;
|
||||
}
|
||||
#pragma omp master
|
||||
nthreads = nthrds; // transfer nn to to master thread
|
||||
}
|
||||
cout << " " << nthreads << " threads have been started." << endl;
|
||||
|
||||
//##########################################################################
|
||||
// Memory allocation
|
||||
cout << "Memory allocation\n";
|
||||
|
||||
vector<double> x(N), y(N);
|
||||
|
||||
cout.precision(2);
|
||||
cout << 2.0 * N *sizeof(x[0]) / 1024 / 1024 / 1024 << " GByte Memory allocated\n";
|
||||
cout.precision(6);
|
||||
|
||||
//##########################################################################
|
||||
// Data initialization
|
||||
// Special: x_i = i+1; y_i = 1/x_i ==> <x,y> == N
|
||||
for (unsigned int i = 0; i < N; ++i)
|
||||
{
|
||||
x[i] = i + 1;
|
||||
y[i] = 1.0 / x[i];
|
||||
}
|
||||
|
||||
//##########################################################################
|
||||
cout << "\nStart Benchmarking\n";
|
||||
|
||||
// Do calculation
|
||||
double tstart = omp_get_wtime(); // OpenMP
|
||||
|
||||
double sk(0.0);
|
||||
for (int i = 0; i < NLOOPS; ++i)
|
||||
{
|
||||
//sk = scalar(x, y);
|
||||
sk = scalar_parallel(x, y);
|
||||
//sk = scalar_trans(x, y);
|
||||
//sk = norm(x);
|
||||
}
|
||||
|
||||
double t1 = omp_get_wtime() - tstart; // OpenMP
|
||||
|
||||
t1 /= NLOOPS; // divide by number of function calls
|
||||
|
||||
//##########################################################################
|
||||
// Check the correct result
|
||||
cout << "\n <x,y> = " << sk << endl;
|
||||
if (static_cast<unsigned int>(sk) != N)
|
||||
{
|
||||
cout << " !! W R O N G result !!\n";
|
||||
}
|
||||
cout << endl;
|
||||
|
||||
//##########################################################################
|
||||
// Timings and Performance
|
||||
cout << endl;
|
||||
cout.precision(2);
|
||||
cout << "Total benchmarking time: " << t1*NLOOPS << endl;
|
||||
cout << "Timing in sec. : " << t1 << endl;
|
||||
cout << "GFLOPS : " << 2.0 * N / t1 / 1024 / 1024 / 1024 << endl;
|
||||
cout << "GiByte/s : " << 2.0 * N / t1 / 1024 / 1024 / 1024 * sizeof(x[0]) << endl;
|
||||
|
||||
//#########################################################################
|
||||
|
||||
cout << "\n Try the reduction with an STL-vektor \n";
|
||||
|
||||
auto vr = reduction_vec_append(5);
|
||||
cout << "done\n";
|
||||
cout << vr << endl;
|
||||
|
||||
|
||||
return 0;
|
||||
} // memory for x and y will be deallocated their destructors
|
||||
137
cpp_workspace/ex5/ex5_1/mylib.cpp
Normal file
137
cpp_workspace/ex5/ex5_1/mylib.cpp
Normal file
|
|
@ -0,0 +1,137 @@
|
|||
#include "mylib.h"
|
||||
#include <cassert> // assert()
|
||||
#include <cmath>
|
||||
#include <iostream>
|
||||
#include <functional> // multiplies<>{}
|
||||
#include <list>
|
||||
#include <numeric> // iota()
|
||||
#ifdef _OPENMP
|
||||
#include <omp.h>
|
||||
#endif
|
||||
#include <vector>
|
||||
using namespace std;
|
||||
|
||||
|
||||
double scalar_parallel(vector<double> const &x, vector<double> const &y)
|
||||
{
|
||||
assert(x.size() == y.size()); // switch off via compile flag: -DNDEBUG
|
||||
size_t const N = x.size();
|
||||
double sum = 0.0;
|
||||
#pragma omp parallel default(none) shared(x,y,N, cout) reduction(+:sum)
|
||||
{
|
||||
const size_t nthreads = omp_get_num_threads();
|
||||
const size_t threadnum = omp_get_thread_num();
|
||||
const size_t chunksize = N/nthreads;
|
||||
|
||||
|
||||
size_t start = threadnum*chunksize;
|
||||
size_t end = start + chunksize;
|
||||
if (threadnum == nthreads - 1)
|
||||
end = N;
|
||||
|
||||
|
||||
for (size_t i = start; i < end; ++i)
|
||||
{
|
||||
sum += x[i] * y[i];
|
||||
}
|
||||
|
||||
}
|
||||
return sum;
|
||||
}
|
||||
|
||||
|
||||
vector<int> reduction_vec_append(int n)
|
||||
{
|
||||
vector<int> vec(n);
|
||||
#pragma omp parallel default(none) shared(cout) reduction(VecAppend:vec)
|
||||
{
|
||||
#pragma omp barrier
|
||||
#pragma omp critical
|
||||
cout << omp_get_thread_num() << " : " << vec.size() << endl;
|
||||
#pragma omp barrier
|
||||
iota( vec.begin(),vec.end(), omp_get_thread_num() );
|
||||
#pragma omp barrier
|
||||
|
||||
}
|
||||
return vec;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
double scalar(vector<double> const &x, vector<double> const &y)
|
||||
{
|
||||
assert(x.size() == y.size()); // switch off via compile flag: -DNDEBUG
|
||||
size_t const N = x.size();
|
||||
double sum = 0.0;
|
||||
#pragma omp parallel for default(none) shared(x,y,N) reduction(+:sum) schedule(runtime) // added schedule(runtime)
|
||||
for (size_t i = 0; i < N; ++i)
|
||||
{
|
||||
sum += x[i] * y[i];
|
||||
//sum += exp(x[i])*log(y[i]);
|
||||
}
|
||||
return sum;
|
||||
}
|
||||
|
||||
|
||||
double norm(vector<double> const &x)
|
||||
{
|
||||
size_t const N = x.size();
|
||||
double sum = 0.0;
|
||||
#pragma omp parallel for default(none) shared(x,N) reduction(+:sum) schedule(runtime) // added schedule(runtime)
|
||||
for (size_t i = 0; i < N; ++i)
|
||||
{
|
||||
sum += x[i]*x[i];
|
||||
}
|
||||
return sum;
|
||||
}
|
||||
|
||||
|
||||
vector<int> reduction_vec(int n)
|
||||
{
|
||||
vector<int> vec(n);
|
||||
#pragma omp parallel default(none) shared(cout) reduction(VecAdd:vec)
|
||||
{
|
||||
#pragma omp barrier
|
||||
#pragma omp critical
|
||||
cout << omp_get_thread_num() << " : " << vec.size() << endl;
|
||||
#pragma omp barrier
|
||||
iota( vec.begin(),vec.end(), omp_get_thread_num() );
|
||||
#pragma omp barrier
|
||||
|
||||
}
|
||||
return vec;
|
||||
}
|
||||
|
||||
|
||||
double scalar_trans(vector<double> const &x, vector<double> const &y)
|
||||
{
|
||||
assert(x.size() == y.size()); // switch off via compile flag: -DNDEBUG
|
||||
vector<double> z(x.size());
|
||||
//list<double> z(x.size()); // parallel for-loop on iterators not possible (missing 'operator-')
|
||||
// c++-20 CLANG_, ONEAPI_:condition of OpenMP for loop must be a relational comparison
|
||||
|
||||
transform(cbegin(x),cend(x),cbegin(y),begin(z),std::multiplies<>{});
|
||||
|
||||
double sum = 0.0;
|
||||
#pragma omp parallel for default(none) shared(z) reduction(+:sum) schedule(runtime) // added schedule(runtime)
|
||||
for (auto pi = cbegin(z); pi!=cend(z); ++pi)
|
||||
{
|
||||
sum += *pi;
|
||||
}
|
||||
//for (auto val: z)
|
||||
//{
|
||||
//sum += val;
|
||||
//}
|
||||
return sum;
|
||||
}
|
||||
|
||||
|
||||
|
||||
88
cpp_workspace/ex5/ex5_1/mylib.h
Normal file
88
cpp_workspace/ex5/ex5_1/mylib.h
Normal file
|
|
@ -0,0 +1,88 @@
|
|||
#pragma once
|
||||
#include <cassert>
|
||||
#include <iomanip> // setw()
|
||||
#include <iostream>
|
||||
#include <omp.h>
|
||||
#include <vector>
|
||||
|
||||
/** Inner product
|
||||
@param[in] x vector
|
||||
@param[in] y vector
|
||||
@return resulting Euclidian inner product <x,y>
|
||||
*/
|
||||
double scalar_parallel(std::vector<double> const &x, std::vector<double> const &y);
|
||||
double scalar(std::vector<double> const &x, std::vector<double> const &y);
|
||||
double scalar_trans(std::vector<double> const &x, std::vector<double> const &y);
|
||||
|
||||
|
||||
|
||||
// Declare additional reduction operation in OpenMP for STL-vector
|
||||
#pragma omp declare reduction(VecAppend : std::vector<int> : omp_out.insert(omp_out.end(), omp_in.begin(), omp_in.end())) \
|
||||
initializer (omp_priv=omp_orig)
|
||||
|
||||
std::vector<int> reduction_vec_append(int n);
|
||||
|
||||
|
||||
/** l2-norm
|
||||
@param[in] x vector
|
||||
@return resulting Euclidian norm
|
||||
*/
|
||||
double norm(std::vector<double> const &x);
|
||||
|
||||
/** Vector @p b adds its elements to vector @p a .
|
||||
@param[in] a vector
|
||||
@param[in] b vector
|
||||
@return a+=b componentwise
|
||||
*/
|
||||
template<class T>
|
||||
std::vector<T> &operator+=(std::vector<T> &a, std::vector<T> const &b)
|
||||
{
|
||||
assert(a.size()==b.size());
|
||||
for (size_t k = 0; k < a.size(); ++k) {
|
||||
a[k] += b[k];
|
||||
}
|
||||
return a;
|
||||
}
|
||||
|
||||
// Declare the reduction operation in OpenMP for an STL-vector
|
||||
// omp_out += omp_in requires operator+=(vector<int> &, vector<int> const &) from above
|
||||
// ------------------------------------------------------------
|
||||
// https://scc.ustc.edu.cn/zlsc/tc4600/intel/2016.0.109/compiler_c/common/core/GUID-7312910C-D175-4544-99C5-29C12D980744.htm
|
||||
// https://gist.github.com/eruffaldi/7180bdec4c8c9a11f019dd0ba9a2d68c
|
||||
// https://stackoverflow.com/questions/29633531/user-defined-reduction-on-vector-of-varying-size
|
||||
// see also p.74ff in https://www.fz-juelich.de/ias/jsc/EN/AboutUs/Staff/Hagemeier_A/docs-parallel-programming/OpenMP-Slides.pdf
|
||||
#pragma omp declare reduction(VecAdd : std::vector<int> : omp_out += omp_in) \
|
||||
initializer (omp_priv=omp_orig)
|
||||
|
||||
// Templates are n o t possible, i.e. the reduction has to be declared fore a specified type.
|
||||
//template <class T>
|
||||
//#pragma omp declare reduction(VecAdd : std::vector<T> : omp_out += omp_in) initializer (omp_priv(omp_orig))
|
||||
// MS: template nach #pragma !?
|
||||
|
||||
// ------------------------------------------------------------
|
||||
|
||||
/** Test for vector reduction.
|
||||
*
|
||||
* The thread-private vectors of size @p n are initialized via @f$v_k^{tID}=tID+k@f$.
|
||||
* Afterwards these vectors are accumulated, i.e.,
|
||||
* @f$v_k= \sum_{tID=0}^{numThreads} v_k^{tID}@f$.
|
||||
*
|
||||
* @param[in] n size of global/private vector
|
||||
* @return resulting global vector.
|
||||
*/
|
||||
std::vector<int> reduction_vec(int n);
|
||||
|
||||
|
||||
|
||||
/** Output of a vector.
|
||||
@param[in,out] s output stream
|
||||
@param[in] x vector
|
||||
@return modified output stream
|
||||
*/
|
||||
template <class T>
|
||||
std::ostream &operator<<(std::ostream &s, std::vector<T> const &x)
|
||||
{
|
||||
for (auto const &v : x) s << std::setw(4) << v << " ";
|
||||
return s;
|
||||
}
|
||||
|
||||
70
cpp_workspace/ex5/ex5_1/timing.h
Normal file
70
cpp_workspace/ex5/ex5_1/timing.h
Normal file
|
|
@ -0,0 +1,70 @@
|
|||
#pragma once
|
||||
#include <chrono> // timing
|
||||
#include <stack>
|
||||
|
||||
using Clock = std::chrono::system_clock; //!< The wall clock timer chosen
|
||||
//using Clock = std::chrono::high_resolution_clock;
|
||||
using TPoint= std::chrono::time_point<Clock>;
|
||||
|
||||
// [Galowicz, C++17 STL Cookbook, p. 29]
|
||||
inline
|
||||
std::stack<TPoint> MyStopWatch; //!< starting time of stopwatch
|
||||
|
||||
/** Starts stopwatch timer.
|
||||
* Use as @code tic(); myfunction(...) ; double tsec = toc(); @endcode
|
||||
*
|
||||
* The timining is allowed to be nested and the recent time is stored on top of the stack.
|
||||
*
|
||||
* @return recent time
|
||||
* @see toc
|
||||
*/
|
||||
inline auto tic()
|
||||
{
|
||||
MyStopWatch.push(Clock::now());
|
||||
return MyStopWatch.top();
|
||||
}
|
||||
|
||||
/** Returns the elapsed time from stopwatch.
|
||||
*
|
||||
* The time from top of the stack is used
|
||||
* if time point @p t_b is not passed as input parameter.
|
||||
* Use as @code tic(); myfunction(...) ; double tsec = toc(); @endcode
|
||||
* or as @code auto t_b = tic(); myfunction(...) ; double tsec = toc(t_b); @endcode
|
||||
* The last option is to be used in the case of
|
||||
* non-nested but overlapping time measurements.
|
||||
*
|
||||
* @param[in] t_b start time of some stop watch
|
||||
* @return elapsed time in seconds.
|
||||
*
|
||||
*/
|
||||
inline double toc(TPoint const &t_b = MyStopWatch.top())
|
||||
{
|
||||
// https://en.cppreference.com/w/cpp/chrono/treat_as_floating_point
|
||||
using Unit = std::chrono::seconds;
|
||||
using FpSeconds = std::chrono::duration<double, Unit::period>;
|
||||
auto t_e = Clock::now();
|
||||
MyStopWatch.pop();
|
||||
return FpSeconds(t_e-t_b).count();
|
||||
}
|
||||
|
||||
#include <iostream>
|
||||
#include <string>
|
||||
/** Executes function @p f and measures/prints elapsed wall clock time in seconds
|
||||
*
|
||||
* Call as
|
||||
* @code measure("Time for (b = b + 1)", [&]() {
|
||||
thrust::transform(b.begin(), b.end(), b.begin(), increment());
|
||||
}); @endcode
|
||||
*
|
||||
* @param[in] label additional string to be printed with the measurement.
|
||||
* @param[in] f function to execute.
|
||||
* @author Therese Bösmüller, 2025
|
||||
*
|
||||
*/
|
||||
auto measure = [](const std::string& label, auto&& f) {
|
||||
auto start = std::chrono::high_resolution_clock::now();
|
||||
f();
|
||||
auto stop = std::chrono::high_resolution_clock::now();
|
||||
auto duration = std::chrono::duration_cast<std::chrono::microseconds>(stop - start).count();
|
||||
std::cout << label << ": " << duration << " microseconds" << std::endl;
|
||||
}; // ';' is needed for a visible documentation of this lambda-function
|
||||
31
cpp_workspace/ex5/ex5_2/Makefile
Normal file
31
cpp_workspace/ex5/ex5_2/Makefile
Normal file
|
|
@ -0,0 +1,31 @@
|
|||
#
|
||||
# use GNU-Compiler tools
|
||||
COMPILER=GCC_
|
||||
# alternatively from the shell
|
||||
# export COMPILER=GCC_
|
||||
# or, alternatively from the shell
|
||||
# make COMPILER=GCC_
|
||||
|
||||
# use Intel compilers
|
||||
#COMPILER=ICC_
|
||||
|
||||
# use PGI compilers
|
||||
# COMPILER=PGI_
|
||||
|
||||
|
||||
SOURCES = main.cpp mylib.cpp
|
||||
OBJECTS = $(SOURCES:.cpp=.o)
|
||||
|
||||
PROGRAM = main.${COMPILER}
|
||||
|
||||
# uncomment the next to lines for debugging and detailed performance analysis
|
||||
CXXFLAGS += -g
|
||||
LINKFLAGS += -g
|
||||
# do not use -pg with PGI compilers
|
||||
|
||||
ifndef COMPILER
|
||||
COMPILER=GCC_
|
||||
endif
|
||||
|
||||
|
||||
include ../${COMPILER}default.mk
|
||||
501
cpp_workspace/ex5/ex5_2/data_1.txt
Normal file
501
cpp_workspace/ex5/ex5_2/data_1.txt
Normal file
|
|
@ -0,0 +1,501 @@
|
|||
141
|
||||
261
|
||||
87
|
||||
430
|
||||
258
|
||||
298
|
||||
425
|
||||
120
|
||||
496
|
||||
707
|
||||
244
|
||||
786
|
||||
75
|
||||
394
|
||||
4
|
||||
221
|
||||
2
|
||||
190
|
||||
143
|
||||
269
|
||||
175
|
||||
139
|
||||
599
|
||||
902
|
||||
940
|
||||
222
|
||||
483
|
||||
377
|
||||
524
|
||||
265
|
||||
69
|
||||
437
|
||||
174
|
||||
27
|
||||
955
|
||||
431
|
||||
962
|
||||
763
|
||||
8
|
||||
681
|
||||
706
|
||||
646
|
||||
553
|
||||
219
|
||||
773
|
||||
229
|
||||
371
|
||||
891
|
||||
857
|
||||
403
|
||||
319
|
||||
609
|
||||
911
|
||||
910
|
||||
592
|
||||
333
|
||||
854
|
||||
443
|
||||
905
|
||||
34
|
||||
533
|
||||
717
|
||||
180
|
||||
337
|
||||
188
|
||||
322
|
||||
404
|
||||
549
|
||||
49
|
||||
553
|
||||
275
|
||||
242
|
||||
244
|
||||
155
|
||||
957
|
||||
936
|
||||
819
|
||||
729
|
||||
176
|
||||
361
|
||||
189
|
||||
2
|
||||
317
|
||||
700
|
||||
626
|
||||
544
|
||||
440
|
||||
288
|
||||
502
|
||||
762
|
||||
763
|
||||
577
|
||||
748
|
||||
646
|
||||
124
|
||||
505
|
||||
348
|
||||
93
|
||||
148
|
||||
199
|
||||
673
|
||||
432
|
||||
695
|
||||
257
|
||||
10
|
||||
533
|
||||
280
|
||||
947
|
||||
907
|
||||
393
|
||||
25
|
||||
672
|
||||
838
|
||||
972
|
||||
57
|
||||
451
|
||||
583
|
||||
687
|
||||
720
|
||||
651
|
||||
727
|
||||
374
|
||||
582
|
||||
117
|
||||
58
|
||||
980
|
||||
285
|
||||
595
|
||||
963
|
||||
186
|
||||
194
|
||||
342
|
||||
933
|
||||
391
|
||||
274
|
||||
152
|
||||
398
|
||||
375
|
||||
132
|
||||
436
|
||||
92
|
||||
615
|
||||
11
|
||||
574
|
||||
790
|
||||
236
|
||||
449
|
||||
570
|
||||
62
|
||||
497
|
||||
643
|
||||
222
|
||||
838
|
||||
972
|
||||
847
|
||||
506
|
||||
279
|
||||
747
|
||||
237
|
||||
958
|
||||
621
|
||||
601
|
||||
173
|
||||
91
|
||||
256
|
||||
859
|
||||
912
|
||||
700
|
||||
726
|
||||
230
|
||||
577
|
||||
811
|
||||
404
|
||||
989
|
||||
90
|
||||
321
|
||||
512
|
||||
61
|
||||
726
|
||||
557
|
||||
530
|
||||
830
|
||||
859
|
||||
790
|
||||
318
|
||||
453
|
||||
753
|
||||
110
|
||||
110
|
||||
270
|
||||
525
|
||||
973
|
||||
711
|
||||
312
|
||||
292
|
||||
851
|
||||
912
|
||||
640
|
||||
256
|
||||
89
|
||||
839
|
||||
585
|
||||
949
|
||||
62
|
||||
585
|
||||
286
|
||||
828
|
||||
191
|
||||
443
|
||||
394
|
||||
827
|
||||
677
|
||||
208
|
||||
319
|
||||
134
|
||||
672
|
||||
571
|
||||
170
|
||||
148
|
||||
477
|
||||
909
|
||||
553
|
||||
33
|
||||
54
|
||||
806
|
||||
452
|
||||
383
|
||||
790
|
||||
365
|
||||
533
|
||||
712
|
||||
872
|
||||
329
|
||||
651
|
||||
975
|
||||
76
|
||||
588
|
||||
414
|
||||
310
|
||||
264
|
||||
759
|
||||
996
|
||||
187
|
||||
782
|
||||
196
|
||||
993
|
||||
803
|
||||
425
|
||||
729
|
||||
499
|
||||
809
|
||||
357
|
||||
74
|
||||
591
|
||||
911
|
||||
194
|
||||
433
|
||||
750
|
||||
40
|
||||
947
|
||||
764
|
||||
559
|
||||
184
|
||||
498
|
||||
518
|
||||
995
|
||||
855
|
||||
963
|
||||
679
|
||||
404
|
||||
935
|
||||
480
|
||||
232
|
||||
397
|
||||
706
|
||||
559
|
||||
757
|
||||
996
|
||||
963
|
||||
536
|
||||
964
|
||||
116
|
||||
52
|
||||
305
|
||||
581
|
||||
531
|
||||
902
|
||||
541
|
||||
432
|
||||
543
|
||||
713
|
||||
17
|
||||
801
|
||||
143
|
||||
479
|
||||
257
|
||||
370
|
||||
662
|
||||
170
|
||||
279
|
||||
199
|
||||
196
|
||||
327
|
||||
881
|
||||
472
|
||||
404
|
||||
180
|
||||
969
|
||||
408
|
||||
845
|
||||
616
|
||||
377
|
||||
878
|
||||
785
|
||||
465
|
||||
814
|
||||
899
|
||||
430
|
||||
335
|
||||
597
|
||||
902
|
||||
703
|
||||
378
|
||||
735
|
||||
955
|
||||
543
|
||||
541
|
||||
312
|
||||
72
|
||||
182
|
||||
93
|
||||
464
|
||||
10
|
||||
916
|
||||
643
|
||||
2
|
||||
31
|
||||
209
|
||||
455
|
||||
128
|
||||
9
|
||||
728
|
||||
355
|
||||
781
|
||||
437
|
||||
437
|
||||
50
|
||||
50
|
||||
92
|
||||
595
|
||||
242
|
||||
842
|
||||
858
|
||||
964
|
||||
489
|
||||
221
|
||||
227
|
||||
537
|
||||
763
|
||||
348
|
||||
462
|
||||
640
|
||||
918
|
||||
162
|
||||
716
|
||||
578
|
||||
434
|
||||
885
|
||||
394
|
||||
179
|
||||
634
|
||||
625
|
||||
328
|
||||
803
|
||||
1000
|
||||
981
|
||||
128
|
||||
233
|
||||
24
|
||||
608
|
||||
111
|
||||
408
|
||||
885
|
||||
549
|
||||
370
|
||||
209
|
||||
441
|
||||
957
|
||||
125
|
||||
471
|
||||
857
|
||||
44
|
||||
692
|
||||
979
|
||||
284
|
||||
134
|
||||
686
|
||||
910
|
||||
611
|
||||
900
|
||||
194
|
||||
755
|
||||
347
|
||||
419
|
||||
156
|
||||
820
|
||||
625
|
||||
739
|
||||
806
|
||||
68
|
||||
951
|
||||
498
|
||||
756
|
||||
743
|
||||
832
|
||||
157
|
||||
458
|
||||
619
|
||||
933
|
||||
836
|
||||
896
|
||||
583
|
||||
583
|
||||
855
|
||||
35
|
||||
886
|
||||
408
|
||||
37
|
||||
747
|
||||
155
|
||||
144
|
||||
606
|
||||
255
|
||||
325
|
||||
402
|
||||
407
|
||||
387
|
||||
610
|
||||
167
|
||||
189
|
||||
95
|
||||
324
|
||||
770
|
||||
235
|
||||
741
|
||||
693
|
||||
825
|
||||
828
|
||||
294
|
||||
310
|
||||
524
|
||||
326
|
||||
832
|
||||
811
|
||||
557
|
||||
263
|
||||
681
|
||||
234
|
||||
457
|
||||
385
|
||||
539
|
||||
992
|
||||
756
|
||||
981
|
||||
235
|
||||
529
|
||||
52
|
||||
757
|
||||
602
|
||||
858
|
||||
989
|
||||
930
|
||||
410
|
||||
1
|
||||
541
|
||||
208
|
||||
220
|
||||
326
|
||||
96
|
||||
748
|
||||
749
|
||||
544
|
||||
339
|
||||
833
|
||||
553
|
||||
958
|
||||
893
|
||||
357
|
||||
547
|
||||
347
|
||||
623
|
||||
797
|
||||
746
|
||||
126
|
||||
823
|
||||
26
|
||||
415
|
||||
732
|
||||
782
|
||||
368
|
||||
|
||||
BIN
cpp_workspace/ex5/ex5_2/main.GCC_
Executable file
BIN
cpp_workspace/ex5/ex5_2/main.GCC_
Executable file
Binary file not shown.
130
cpp_workspace/ex5/ex5_2/main.cpp
Normal file
130
cpp_workspace/ex5/ex5_2/main.cpp
Normal file
|
|
@ -0,0 +1,130 @@
|
|||
#include "mylib.h"
|
||||
#include <fstream>
|
||||
#include <iostream>
|
||||
#include <omp.h>
|
||||
#include <vector>
|
||||
using namespace std;
|
||||
|
||||
|
||||
int main()
|
||||
{
|
||||
// read vector from file
|
||||
vector<size_t> data_vector = {};
|
||||
|
||||
ifstream input_stream("data_1.txt");
|
||||
|
||||
size_t line;
|
||||
while(input_stream >> line)
|
||||
{
|
||||
data_vector.push_back(line);
|
||||
}
|
||||
data_vector.shrink_to_fit();
|
||||
|
||||
|
||||
|
||||
|
||||
// specify loops
|
||||
size_t NLOOPS = 10000;
|
||||
|
||||
|
||||
|
||||
// ############# Parallelization with openMP #############
|
||||
// calculate arithmetic mean, geometric mean and harmonic mean
|
||||
double am_omp, gm_omp, hm_omp;
|
||||
|
||||
double tstart = omp_get_wtime();
|
||||
|
||||
for (size_t i = 0; i < NLOOPS; ++i)
|
||||
means_omp(data_vector, am_omp, gm_omp, hm_omp);
|
||||
|
||||
double t_means_omp = (omp_get_wtime() - tstart)/NLOOPS;
|
||||
|
||||
// calculate minimum and maximum
|
||||
size_t min, max;
|
||||
|
||||
tstart = omp_get_wtime();
|
||||
|
||||
for (size_t i = 0; i < NLOOPS; ++i)
|
||||
minmax_omp(data_vector, min, max);
|
||||
|
||||
double t_minmax_omp = (omp_get_wtime() - tstart)/NLOOPS;
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
// ############# Parallelization with C++ algorithms #############
|
||||
// calculate arithmetic mean, geometric mean and harmonic mean
|
||||
double am_cpp, gm_cpp, hm_cpp;
|
||||
|
||||
tstart = omp_get_wtime();
|
||||
|
||||
for (size_t i = 0; i < NLOOPS; ++i)
|
||||
means_cpp(data_vector, am_cpp, gm_cpp, hm_cpp);
|
||||
|
||||
double t_means_cpp = (omp_get_wtime() - tstart)/NLOOPS;
|
||||
|
||||
// calculate minimum and maximum
|
||||
size_t min_cpp, max_cpp;
|
||||
|
||||
tstart = omp_get_wtime();
|
||||
|
||||
for (size_t i = 0; i < NLOOPS; ++i)
|
||||
minmax_cpp(data_vector, min_cpp, max_cpp);
|
||||
|
||||
double t_minmax_cpp = (omp_get_wtime() - tstart)/NLOOPS;
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
// print results
|
||||
cout << "####### OpenMP #######" << endl;
|
||||
cout << "minimum: " << min << endl;
|
||||
cout << "maximum: " << max << endl;
|
||||
cout << "duration: " << t_minmax_omp << endl << endl;
|
||||
|
||||
cout << "arithmetic mean: " << am_omp << endl;
|
||||
cout << "geometric mean: " << gm_omp << endl;
|
||||
cout << "harmonic mean: " << hm_omp << endl;
|
||||
cout << "duration: " << t_means_omp << endl << endl;
|
||||
|
||||
|
||||
cout << "####### C++ #######" << endl;
|
||||
cout << "minimum: " << min_cpp << endl;
|
||||
cout << "maximum: " << max_cpp << endl;
|
||||
cout << "duration: " << t_minmax_cpp << endl << endl;
|
||||
|
||||
cout << "arithmetic mean: " << am_cpp << endl;
|
||||
cout << "geometric mean: " << gm_cpp << endl;
|
||||
cout << "harmonic mean: " << hm_cpp << endl;
|
||||
cout << "duration: " << t_means_cpp << endl << endl;
|
||||
|
||||
|
||||
|
||||
// ####### OpenMP #######
|
||||
// minimum: 1
|
||||
// maximum: 1000
|
||||
// duration: 3.52086e-06
|
||||
|
||||
// arithmetic mean: 498.184
|
||||
// geometric mean: 364.412
|
||||
// harmonic mean: 95.6857
|
||||
// duration: 5.90171e-06
|
||||
|
||||
// ####### C++ #######
|
||||
// minimum: 1
|
||||
// maximum: 1000
|
||||
// duration: 1.76816e-05
|
||||
|
||||
// arithmetic mean: 498.184
|
||||
// geometric mean: 364.412
|
||||
// harmonic mean: 95.6857
|
||||
// duration: 2.35728e-05
|
||||
|
||||
// --> the openMP variant is faster in both cases
|
||||
|
||||
|
||||
return 0;
|
||||
}
|
||||
BIN
cpp_workspace/ex5/ex5_2/main.o
Normal file
BIN
cpp_workspace/ex5/ex5_2/main.o
Normal file
Binary file not shown.
103
cpp_workspace/ex5/ex5_2/mylib.cpp
Normal file
103
cpp_workspace/ex5/ex5_2/mylib.cpp
Normal file
|
|
@ -0,0 +1,103 @@
|
|||
#include "mylib.h"
|
||||
#include <algorithm>
|
||||
#include <cmath>
|
||||
#include <execution>
|
||||
#include <iostream>
|
||||
#include <numeric>
|
||||
#include <omp.h>
|
||||
|
||||
using namespace std;
|
||||
|
||||
|
||||
void means_omp(const std::vector<size_t> numbers, double &am, double &gm, double &hm)
|
||||
{
|
||||
size_t const n = numbers.size();
|
||||
|
||||
am = 0.;
|
||||
gm = 0.;
|
||||
hm = 0.;
|
||||
|
||||
#pragma omp parallel for shared(numbers, n, cout) reduction(+:am, gm, hm)
|
||||
for (size_t i = 0; i < n; ++i)
|
||||
{
|
||||
am += numbers[i];
|
||||
gm += log(numbers[i]);
|
||||
hm += 1.0/numbers[i];
|
||||
|
||||
// #pragma omp critical
|
||||
// {
|
||||
// cout << "Thread number " << omp_get_thread_num() << " processes value " << numbers[i] << endl;
|
||||
// }
|
||||
}
|
||||
|
||||
am /= n;
|
||||
gm = exp(gm/n);
|
||||
hm = n/hm;
|
||||
}
|
||||
|
||||
|
||||
void minmax_omp(const std::vector<size_t> numbers, size_t &global_min, size_t &global_max)
|
||||
{
|
||||
size_t const n = numbers.size();
|
||||
|
||||
global_min = -1; // gives the maximum size_t value
|
||||
global_max = 0;
|
||||
|
||||
#pragma omp parallel shared(numbers, n, global_min, global_max)
|
||||
{
|
||||
const size_t nthreads = omp_get_num_threads();
|
||||
const size_t threadnum = omp_get_thread_num();
|
||||
const size_t chunksize = n/nthreads;
|
||||
|
||||
|
||||
size_t start = threadnum*chunksize;
|
||||
size_t end = start + chunksize;
|
||||
if (threadnum == nthreads - 1)
|
||||
end = n;
|
||||
|
||||
|
||||
size_t local_min = -1;
|
||||
size_t local_max = 0;
|
||||
for (size_t i = start; i < end ; ++i)
|
||||
{
|
||||
if (numbers[i] < local_min)
|
||||
local_min = numbers[i];
|
||||
|
||||
if (numbers[i] > local_max)
|
||||
local_max = numbers[i];
|
||||
}
|
||||
|
||||
#pragma omp critical
|
||||
{
|
||||
if (local_min < global_min)
|
||||
global_min = local_min;
|
||||
|
||||
if (local_max > global_max)
|
||||
global_max = local_max;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void means_cpp(const std::vector<size_t> numbers, double &am, double &gm, double &hm)
|
||||
{
|
||||
size_t const n = numbers.size();
|
||||
|
||||
am = reduce(std::execution::par, numbers.begin(), numbers.end());
|
||||
gm = transform_reduce(std::execution::par, numbers.begin(), numbers.end(), 0.0, plus{}, [] (size_t x) -> double { return log(x); } );
|
||||
hm = transform_reduce(std::execution::par, numbers.begin(), numbers.end(), 0.0, plus{}, [] (size_t x) -> double { return 1.0/x; });
|
||||
|
||||
am /= n;
|
||||
gm = exp(gm/n);
|
||||
hm = n/hm;
|
||||
}
|
||||
|
||||
|
||||
void minmax_cpp(const std::vector<size_t> numbers, size_t &global_min, size_t &global_max)
|
||||
{
|
||||
auto min_it = min_element(std::execution::par, numbers.begin(), numbers.end());
|
||||
auto max_it = max_element(std::execution::par, numbers.begin(), numbers.end());
|
||||
|
||||
global_min = *min_it;
|
||||
global_max = *max_it;
|
||||
}
|
||||
42
cpp_workspace/ex5/ex5_2/mylib.h
Normal file
42
cpp_workspace/ex5/ex5_2/mylib.h
Normal file
|
|
@ -0,0 +1,42 @@
|
|||
#include <vector>
|
||||
|
||||
/**
|
||||
This function calculates arithmetic mean, geometric mean and harmonic mean of an integer vector.
|
||||
Uses openMP parallelization.
|
||||
@param[in] numbers vector containing integers
|
||||
@param[out] am arithmetic mean
|
||||
@param[out] gm geometric mean
|
||||
@param[out] hm harmonic mean
|
||||
*/
|
||||
void means_omp(const std::vector<size_t> numbers, double &am, double &gm, double &hm);
|
||||
|
||||
|
||||
/**
|
||||
This function calculates the minimum and maximum of a vector.
|
||||
Uses openMP parallelization.
|
||||
@param[in] numbers vector containing integers
|
||||
@param[out] global_min minimum
|
||||
@param[out] global_max maximum
|
||||
*/
|
||||
void minmax_omp(const std::vector<size_t> numbers, size_t &global_min, size_t &global_max);
|
||||
|
||||
|
||||
/**
|
||||
This function calculates arithmetic mean, geometric mean and harmonic mean of an integer vector.
|
||||
Uses C++ parallelization.
|
||||
@param[in] numbers vector containing integers
|
||||
@param[out] am arithmetic mean
|
||||
@param[out] gm geometric mean
|
||||
@param[out] hm harmonic mean
|
||||
*/
|
||||
void means_cpp(const std::vector<size_t> numbers, double &am, double &gm, double &hm);
|
||||
|
||||
|
||||
/**
|
||||
This function calculates the minimum and maximum of a vector.
|
||||
Uses C++ parallelization.
|
||||
@param[in] numbers vector containing integers
|
||||
@param[out] global_min minimum
|
||||
@param[out] global_max maximum
|
||||
*/
|
||||
void minmax_cpp(const std::vector<size_t> numbers, size_t &global_min, size_t &global_max);
|
||||
BIN
cpp_workspace/ex5/ex5_2/mylib.o
Normal file
BIN
cpp_workspace/ex5/ex5_2/mylib.o
Normal file
Binary file not shown.
30
cpp_workspace/ex5/ex5_3/Makefile
Normal file
30
cpp_workspace/ex5/ex5_3/Makefile
Normal file
|
|
@ -0,0 +1,30 @@
|
|||
#
|
||||
# use GNU-Compiler tools
|
||||
COMPILER=GCC_
|
||||
# alternatively from the shell
|
||||
# export COMPILER=GCC_
|
||||
# or, alternatively from the shell
|
||||
# make COMPILER=GCC_
|
||||
|
||||
# use Intel compilers
|
||||
#COMPILER=ICC_
|
||||
|
||||
# use PGI compilers
|
||||
# COMPILER=PGI_
|
||||
|
||||
|
||||
SOURCES = main.cpp goldbach.cpp
|
||||
OBJECTS = $(SOURCES:.cpp=.o)
|
||||
|
||||
PROGRAM = main.${COMPILER}
|
||||
|
||||
# uncomment the next to lines for debugging and detailed performance analysis
|
||||
CXXFLAGS += -g
|
||||
LINKFLAGS += -g
|
||||
# do not use -pg with PGI compilers
|
||||
|
||||
ifndef COMPILER
|
||||
COMPILER=GCC_
|
||||
endif
|
||||
|
||||
include ../${COMPILER}default.mk
|
||||
46
cpp_workspace/ex5/ex5_3/goldbach.cpp
Normal file
46
cpp_workspace/ex5/ex5_3/goldbach.cpp
Normal file
|
|
@ -0,0 +1,46 @@
|
|||
#include "goldbach.h"
|
||||
#include <iostream>
|
||||
#include <iterator>
|
||||
#include <omp.h>
|
||||
|
||||
size_t single_goldbach(size_t k)
|
||||
{
|
||||
const std::vector<size_t> relevant_primes = get_primes(k);
|
||||
size_t m = relevant_primes.size();
|
||||
|
||||
size_t counter = 0;
|
||||
|
||||
#pragma omp parallel for shared(relevant_primes, m, k) reduction(+:counter)
|
||||
for(size_t i = 0; i < m; ++i)
|
||||
{
|
||||
for(size_t j = i; j < m; ++j)
|
||||
{
|
||||
if(relevant_primes[i] + relevant_primes[j] == k)
|
||||
++counter;
|
||||
}
|
||||
}
|
||||
|
||||
return counter;
|
||||
}
|
||||
|
||||
|
||||
std::vector<size_t> count_goldbach(size_t n)
|
||||
{
|
||||
const std::vector<size_t> relevant_primes = get_primes(n);
|
||||
size_t m = relevant_primes.size();
|
||||
|
||||
std::vector<size_t> counter_vector(n + 1, 0);
|
||||
|
||||
#pragma omp parallel for shared(relevant_primes, m, n) reduction(VecAdd:counter_vector)
|
||||
for(size_t i = 0; i < m; ++i)
|
||||
{
|
||||
for(size_t j = i; j < m; ++j)
|
||||
{
|
||||
size_t sum = relevant_primes[i] + relevant_primes[j];
|
||||
if(sum <= n)
|
||||
++counter_vector[relevant_primes[i] + relevant_primes[j]];
|
||||
}
|
||||
}
|
||||
|
||||
return counter_vector;
|
||||
}
|
||||
45
cpp_workspace/ex5/ex5_3/goldbach.h
Normal file
45
cpp_workspace/ex5/ex5_3/goldbach.h
Normal file
|
|
@ -0,0 +1,45 @@
|
|||
#pragma once
|
||||
#include "mayer_primes.h"
|
||||
#include <cassert>
|
||||
#include <vector>
|
||||
|
||||
|
||||
/**
|
||||
This function returns the number of possible decompositions of an integer into a sum of two prime numbers.
|
||||
@param[in] k first integer
|
||||
@param[out] count number of decompositions
|
||||
*/
|
||||
size_t single_goldbach(size_t k);
|
||||
|
||||
|
||||
/**
|
||||
This function returns the number of possible decompositions into a sum of two prime numbers of all even integers in the interval [4,n].
|
||||
@param[in] n upper integer bound
|
||||
@param[out] count_vector vector containing the number of decompositions for a natural number the corresponding index
|
||||
*/
|
||||
std::vector<size_t> count_goldbach(size_t n);
|
||||
|
||||
|
||||
/** Vector @p b adds its elements to vector @p a .
|
||||
@param[in] a vector
|
||||
@param[in] b vector
|
||||
@return a+=b componentwise
|
||||
*/
|
||||
template<class T>
|
||||
std::vector<T> &operator+=(std::vector<T> &a, std::vector<T> const &b)
|
||||
{
|
||||
assert(a.size()==b.size());
|
||||
for (size_t k = 0; k < a.size(); ++k) {
|
||||
a[k] += b[k];
|
||||
}
|
||||
return a;
|
||||
}
|
||||
|
||||
// Declare the reduction operation in OpenMP for an STL-vector
|
||||
// omp_out += omp_in requires operator+=(vector<int> &, vector<int> const &) from above
|
||||
// ------------------------------------------------------------
|
||||
// https://scc.ustc.edu.cn/zlsc/tc4600/intel/2016.0.109/compiler_c/common/core/GUID-7312910C-D175-4544-99C5-29C12D980744.htm
|
||||
// https://gist.github.com/eruffaldi/7180bdec4c8c9a11f019dd0ba9a2d68c
|
||||
// https://stackoverflow.com/questions/29633531/user-defined-reduction-on-vector-of-varying-size
|
||||
// see also p.74ff in https://www.fz-juelich.de/ias/jsc/EN/AboutUs/Staff/Hagemeier_A/docs-parallel-programming/OpenMP-Slides.pdf
|
||||
#pragma omp declare reduction(VecAdd : std::vector<size_t> : omp_out += omp_in) initializer (omp_priv=omp_orig)
|
||||
45
cpp_workspace/ex5/ex5_3/main.cpp
Normal file
45
cpp_workspace/ex5/ex5_3/main.cpp
Normal file
|
|
@ -0,0 +1,45 @@
|
|||
#include "goldbach.h"
|
||||
#include <algorithm>
|
||||
#include <iostream>
|
||||
#include <omp.h>
|
||||
using namespace std;
|
||||
|
||||
|
||||
int main()
|
||||
{
|
||||
cout << "Check: 694 has "<< single_goldbach(694) << " decompositions." << endl << "----------------------------------------" << endl;
|
||||
|
||||
for(size_t n : {10000, 100000, 400000, 1000000, 2000000})
|
||||
{
|
||||
double t_start = omp_get_wtime();
|
||||
|
||||
auto goldbach_vector = count_goldbach(n);
|
||||
|
||||
auto max_it = max_element(goldbach_vector.begin(), goldbach_vector.end());
|
||||
size_t max_number = distance(goldbach_vector.begin(), max_it);
|
||||
|
||||
double t_end = omp_get_wtime() - t_start;
|
||||
|
||||
cout << "The number " << max_number << " has " << *max_it << " decompositions. Duration: " << t_end << endl;
|
||||
}
|
||||
|
||||
/*
|
||||
###### WITHOUT PARALLELIZATION ######
|
||||
The number 9240 has 329 decompositions. Duration: 0.00307696
|
||||
The number 99330 has 2168 decompositions. Duration: 0.189839
|
||||
The number 390390 has 7094 decompositions. Duration: 1.3042
|
||||
The number 990990 has 15594 decompositions. Duration: 5.45034
|
||||
The number 1981980 has 27988 decompositions. Duration: 47.1807
|
||||
|
||||
|
||||
###### WITH PARALLELIZATION ######
|
||||
The number 9240 has 329 decompositions. Duration: 0.000734854
|
||||
The number 99330 has 2168 decompositions. Duration: 0.0251322
|
||||
The number 390390 has 7094 decompositions. Duration: 0.487375
|
||||
The number 990990 has 15594 decompositions. Duration: 6.16972
|
||||
The number 1981980 has 27988 decompositions. Duration: 31.5699
|
||||
*/
|
||||
|
||||
|
||||
return 0;
|
||||
}
|
||||
Some files were not shown because too many files have changed in this diff Show more
Loading…
Reference in a new issue