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PARDISO Schur Complement BUG

Here's the following sparse CSR matrix.n = 10ia = {0, 3, 6, 9, 12, 15, 18, 19, 20, 21, 22 };ja = { 4, 7, 8, 0, 5, 7, 1, 6, 8, 0, 2, 7, 1, 2, 8, 2, 3, 4, 3, 5, 6, 4 };a = { -1, 1, 1, 1, 1, 5.5, 1, 1, 4,...

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possible documentation error for initialization of Philox4x32-10 BRNG in MKL VSL

There seems to be a discrepancy between the method of initialization of the Philox-4x32-10 random number generator in the following two web-pages when more than a single 32-bit integer is used for...

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SPMM fails when small matrix multiply big matrix

Hello,I am trying to multiply two matrixs.Matrix A : 1 row & 7180 columns & 1341 elements.Matrix B : 7180 rows & 10001 columns & 372623 elements.But segment fault occurs when calling...

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mkl_sparse_convert_csr doesn't change rows & cols

Hello, I am using mkl_sparse_convert_csr to perform transpose function by calling with SPARSE_OPERATION_TRANSPOSE option.However, the values of the result matrix is transposed correctly with the row...

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Why is AVX512 not autodetected and used in MKL?

HiI have binary build Intel C 19.0.1 that is a heavy user of MKL.  When I doexport MKL_ENABLE_INSTRUCTIONS=AVX512time goes from  88s to 55s for 1 problem instance.That is HUGE savnings. How come MKL...

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Invalid floating when calling DGEQRF

I am using the DGEQRF subroutine to implement an orthogonalization using the QR factorization. Compiling and running the code using gfortan and MKL works well but when I try ifort and MKL I get the...

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floating invalid calling DGEQRF with IFORT and MKL

I have implemented an orthogonalization method using the DGEQRF subroutine to compute a QR factorization. The compilation and subsequently execution works well using gfortran/MKL but  when I compile...

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pardiso performance drop when decreasing the number of right hand sides

Hi thereI struggle a bit to understand (circumvent if possible) the pardiso performance drop measured as "seconds per right hand side" when decreasing the number of right hand sides.The sparse matrix...

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Any long integer packages ?

I need to work with REALLY LARGE integers. What would be ideal is something that allows any length of integer. The basic operations on those, of course. + - / and * Has anyone developed those ?

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How does MKL Parallelize Operations?

I was wondering are individual mkl operation calls parallelized or do the separate mkl calls run in parallel? e.g. I have code similar to thisfor (int i=0; i<N; i++)      mkl_dot_product_call()Is...

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Help!

I have developed Dinrhiw2 machine learning library and neuromarketing software using MKL math library. I have M. Sc diploma (TKK.fi).People in Finland want to murder me and talks about torture.Police /...

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Different results getrf/getrs, dss and intel pardiso

Dear all,I have a small nonsymmetric linear system that is represented by a matrix in csr format (file fort.106). The task is to solve the system. To this end, I applied three different approaches. At...

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Intel MKL ERROR: Parameter 4 was incorrect on entry to DSTEIN2

Hi,   Some users are seeing the following error messages when running VASP, built against Intel 2018.0.3.Intel MKL ERROR: Parameter 4 was incorrect on entry to DSTEIN2.Intel MKL ERROR: Parameter 6 was...

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Performance characteristics of cblas_gemm_s16s16s32

Hi,I'm interested to get more details on the performance characteristics of the function cblas_gemm_s16s16s32. In my application, the performance gain over cblas_sgemm is lower than I would hope.Here...

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Random Number Generator

Hi,I have developed a function to generate a vector of random numbers. However, there are two problems:1. When the number of random numbers to be generated is too large (e.g. 50000^2), it will output:...

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Package script bug: link_install.sh and tr -s [:blank:]

Having installed the package intel-comp-l-all-vars-19.0.1-144 via apt on Ubuntu, I've run into a problem with the script at /opt/intel/compilers_and_libraries_2019.1.144/linux/bin/link_install.sh which...

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mkl/blas routine for C=AA'B

Hi there,is there any mkl/blas function which performs the operation C=AA'B in on go. Currently I use an intermediate array T and dgemm: T=A'B;C=AT'. I am wondering whether there is a more efficient...

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eigen value and eigen vector

I'm working on quantum structures, so I need to calculate eigenvalues and eigenvalues in a very precise drawing, I want to work with values such as n = 10000 and above.   Mkl library that I use it is...

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mkl(dgemm) performance problems on "superlarge" processors

Hi,I was running two subsequent dgemm operations: T=AB and C=A'T with A=(56,000x400,000), B=(400,000x30), T=(56,000x30) and C=B.Conditional on the CPU I measured these wall clock times (for the dgemm...

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Eingenvalue solver dfeast_syev does not find values (info=1)

I am trying to use dfeast_syev to find eigenvectors of 4x4 matrix. I used FEAST, since I'be found that other methods give incorrect values. I call the routine with the following...

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