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Hello all,
I have a program in which I want to perform a diagonalization of a very large matrix using dsyevd subroutine routine. The dimension of my matrix is 80592, so I need to use integers of 11 digits.
For smaller matrices, I was compiling using the flags "-mkl -CB -heap-arrays -qopenmp -mkl -fpic -mcmodel=large" and everything was fine
But now that I need to use 64 bits integers, I am compiling with "-i8 -I${MKLROOT}/include/intel64/ilp64 -mkl=parallel -CB -heap-arrays -qopenmp -mkl -fpic -mcmodel=large -I${MKLROOT}/include/intel64/ilp64 ${MKLROOT}/lib/intel64/libmkl_blas95_ilp64.a ${ MKLROOT}/lib/intel64/libmkl_lapack95_ilp64.a -liomp5 -lpthread -lm -ldl", which I took from the Intel MKL Link Line advisor, using dynamic linking.
So, when I run my code and reach the part where I call dsyevd, I get the following error:
forrtl: severe (174): SIGSEGV, segmentation fault occurred
I am trying also with a simple small Identity matrix just to test the 64 bits linking. I get the same error.
Many thanks in advance,
Cayo Gonçalves
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please remove -mkl=parallel option and link the example explicitly:
icc -DMKL_ILP64 -I${MKLROOT}/include -L${MKLROOT}/lib/intel64 -lmkl_intel_ilp64 -lmkl_intel_thread -lmkl_core -liomp5 -lpthread -lm -ldl
and declare all integer as MKL_INT into your example.
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please remove -mkl=parallel option and link the example explicitly:
icc -DMKL_ILP64 -I${MKLROOT}/include -L${MKLROOT}/lib/intel64 -lmkl_intel_ilp64 -lmkl_intel_thread -lmkl_core -liomp5 -lpthread -lm -ldl
and declare all integer as MKL_INT into your example.
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Thank you for your answer Gennady. Sorry, I didn't realized that I didn't mentioned that I am using ifort, not icc. Does it make a difference for you solution?
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it is the same for ifort or icc, icl ....
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ok, thanks for the update
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This issue has been resolved and we will no longer respond to this thread. If you require additional assistance from Intel, please start a new thread. Any further interaction in this thread will be considered community only

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