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blitzpp / blitz

Blitz++ Multi-Dimensional Array Library for C++
https://github.com/blitzpp/blitz/wiki
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Divide by zero allowed? #182

Open mankoff opened 11 months ago

mankoff commented 11 months ago

I'm getting the following error:

Thread 1 "r01.exe" received signal SIGFPE, Arithmetic exception.
0x00007ffff7b58b12 in blitz::Divide<double, double>::apply (a=1, b=0) at /home/kdm/projects/GISS/LIME/opt/include/blitz/ops.h:147
147 BZ_DEFINE_BINARY_OP(Divide,/)

From this line:

blitz::Array<double,1> sIpvXOp(1. / IpvXOp->wM);

Is there a flag I can set to allow divide-by-zero to return NaNs rather than SIGFPE? I've compiled Blitz with

CFLAGS="-fPIC" \
 FCFLAGS="-fPIC -DNDEBUG" \
 CPPFLAGS="-fPIC -DNDEBUG" \
 cmake .. \
  -D CMAKE_INSTALL_PREFIX=${LIME_ROOT}/opt \
  -D CMAKE_INSTALL_LIBDIR=${LIME_ROOT}/opt/lib \
  -D Python_EXECUTABLE=${MAMBA_ENV}/lime/bin/python

make -j
make install

(original issue at https://github.com/NASA-GISS/LIME/issues/1)

citibeth commented 11 months ago

It looks like this is being built with GCC. As per GNU docs, compile with traps converts NaNs into arithmetic exceptions:

https://www.gnu.org/software/libc/manual/html_node/FP-Exceptions.html

It's hard to know what flags you are calling GCC with because a lot of stuff could be hidden inside the CMake file. Instead of make -j, try running VERBOSE=1 make (or make VERBOSE=1) to get the GCC command line being used to build Blitz++.

Have you tried compiling Blitz++ without traps, but ModelE with traps? Is there a debugging need for traps within the Blitz++ code?

mankoff commented 11 months ago

Yes, I'd like traps for ModelE, IceBin, etc. but not lower level code like blitz or PETSc (although sometimes trapping in PETSc is helpful to find matrix dimension disagreements). I was trying to achieve that with the -DNDEBUG flag. Do you have suggestions for other options?

I added -D CMAKE_VERBOSE_MAKEFILE=ON to the cmake .. command, and VERBOSE=1 make.

results 
$ VERBOSE=1 make
/usr/bin/cmake -S/home/kdm/projects/GISS/LIME/src/blitz -B/home/kdm/projects/GISS/LIME/src/blitz/build --check-build-system CMakeFiles/Makefile.cmake 0
/usr/bin/cmake -E cmake_progress_start /home/kdm/projects/GISS/LIME/src/blitz/build/CMakeFiles /home/kdm/projects/GISS/LIME/src/blitz/build//CMakeFiles/progress.marks
make  -f CMakeFiles/Makefile2 all
make[1]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
make  -f blitz/array/CMakeFiles/stencil-classes.cc.dir/build.make blitz/array/CMakeFiles/stencil-classes.cc.dir/depend
make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz/array /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/array /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/array/CMakeFiles/stencil-classes.cc.dir/DependInfo.cmake --color=
make[2]: Leaving directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
make  -f blitz/array/CMakeFiles/stencil-classes.cc.dir/build.make blitz/array/CMakeFiles/stencil-classes.cc.dir/build
make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
cd /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/array && /home/kdm/local/mambaforge/envs/lime/bin/python /home/kdm/projects/GISS/LIME/src/blitz/blitz/array/../generate/genstencils.py stencil-classes.cc MAIN_DEPENDENCY /home/kdm/projects/GISS/LIME/src/blitz/blitz/array/../generate/genstencils.py
Generating file stencil-classes.cc
make[2]: Leaving directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
[  0%] Built target stencil-classes.cc
make  -f blitz/generate/CMakeFiles/genvecbops.dir/build.make blitz/generate/CMakeFiles/genvecbops.dir/depend
make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/CMakeFiles/genvecbops.dir/DependInfo.cmake --color=
Dependencies file "blitz/generate/CMakeFiles/genvecbops.dir/genvecbops.cpp.o.d" is newer than depends file "/home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/CMakeFiles/genvecbops.dir/compiler_depend.internal".
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[  8%] Built target genvecbops
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make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/CMakeFiles/vecbops.cc.dir/DependInfo.cmake --color=
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make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
cd /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate && /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/genvecbops
Generating 
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make  -f blitz/generate/CMakeFiles/genvecuops.dir/build.make blitz/generate/CMakeFiles/genvecuops.dir/depend
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cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/CMakeFiles/genvecuops.dir/DependInfo.cmake --color=
Dependencies file "blitz/generate/CMakeFiles/genvecuops.dir/genvecuops.cpp.o.d" is newer than depends file "/home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/CMakeFiles/genvecuops.dir/compiler_depend.internal".
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cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/CMakeFiles/vecuops.cc.dir/DependInfo.cmake --color=
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make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
cd /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate && /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/genvecuops
Generating 
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cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/CMakeFiles/genvecwhere.dir/DependInfo.cmake --color=
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make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/CMakeFiles/vecwhere.cc.dir/DependInfo.cmake --color=
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make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
cd /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate && /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/genvecwhere
Generating 
875 specializations written.
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make  -f blitz/generate/CMakeFiles/genvecbfn.dir/build.make blitz/generate/CMakeFiles/genvecbfn.dir/depend
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cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/CMakeFiles/genvecbfn.dir/DependInfo.cmake --color=
Dependencies file "blitz/generate/CMakeFiles/genvecbfn.dir/genvecbfn.cpp.o.d" is newer than depends file "/home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/CMakeFiles/genvecbfn.dir/compiler_depend.internal".
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make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/CMakeFiles/vecbfn.cc.dir/DependInfo.cmake --color=
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cd /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate && /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/genvecbfn
Generating 
150 operators written.
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cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/CMakeFiles/genmatbops.dir/DependInfo.cmake --color=
Dependencies file "blitz/generate/CMakeFiles/genmatbops.dir/genmatbops.cpp.o.d" is newer than depends file "/home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/CMakeFiles/genmatbops.dir/compiler_depend.internal".
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cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/CMakeFiles/matbops.h.dir/DependInfo.cmake --color=
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cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/CMakeFiles/genpromote.dir/DependInfo.cmake --color=
Dependencies file "blitz/generate/CMakeFiles/genpromote.dir/genpromote.cpp.o.d" is newer than depends file "/home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/CMakeFiles/genpromote.dir/compiler_depend.internal".
Consolidate compiler generated dependencies of target genpromote
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make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
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[ 66%] Built target genpromote
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make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/CMakeFiles/promote-old.h.dir/DependInfo.cmake --color=
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make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
cd /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate && /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/genpromote
Generating 
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[ 66%] Built target promote-old.h
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cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/CMakeFiles/genarrbops.dir/DependInfo.cmake --color=
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make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz/array /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/array /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/array/CMakeFiles/bops.cc.dir/DependInfo.cmake --color=
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make[2]: Entering directory '/home/kdm/projects/GISS/LIME/src/blitz/build'
cd /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate && /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/genarrbops
Generating 
780 operators written.
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cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/generate/CMakeFiles/genarruops.dir/DependInfo.cmake --color=
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cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/blitz/array /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/array /home/kdm/projects/GISS/LIME/src/blitz/build/blitz/array/CMakeFiles/uops.cc.dir/DependInfo.cmake --color=
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cd /home/kdm/projects/GISS/LIME/src/blitz/build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/kdm/projects/GISS/LIME/src/blitz /home/kdm/projects/GISS/LIME/src/blitz/src /home/kdm/projects/GISS/LIME/src/blitz/build /home/kdm/projects/GISS/LIME/src/blitz/build/src /home/kdm/projects/GISS/LIME/src/blitz/build/src/CMakeFiles/blitz-static.dir/DependInfo.cmake --color=
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mankoff commented 11 months ago

ModelE COMPILE_WITH_TRAPS sets -fbounds-check -fcheck-array-temporaries -ffpe-trap=invalid,zero,overflow -fbacktrace. Should I compile Blitz with explicit -fno-... for each of those?