Large overhead and spin time reported in MKL functions
Hello,Using Vtune Amplifier concurrency analysis on an example code of dgemm (link here), the overhead and spin time surprisingly covered almost 100% of the CPU usage bar! (reported here). I tried...
View ArticleNew Intel Premier Support
The New Intel(R) Premier Support (IPS) is coming August 19thWe are excited to announce the launch of a new version of Intel® Premier Support that replaces the existing Intel Premier Support web site...
View ArticleProblem with MKL Scalapack PDGETRF
Hi all,I am trying to use MKL PBLAS/ScaLAPACK routine pdgetrf to do the LU decompostion. I wrote a simple test fortran program and it worked well with 2*2 processes on the cluster. However, when I...
View ArticleProblems running Linpack Benchmark 11.0.5.009
I am new to running the Linpack Benchmark in Windows 7 and have a few questions. I am running (2) Intel E5-2680 CPU in a Gigabyte GA-7PESH2 server. The test was originally run about 10 months ago...
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Faulting module name: mkl_core.dll, version: 11.0.4.1
Faulting module name: mkl_core.dll, version: 11.0.4.1, time stamp: 0x5195ead6Exception code: 0xc0000005Fault offset: 0x00829aa0I'm hoping this is a known issue that has been fixed in a later updated....
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Result error in Pardiso
Hi All,I have many linear equations derived from flow problem at different time steps. These equations have the same structure (same non-zero entries) but different stiffness matrices and...
View Articleproblem in compiling the mkl_lapack_examples/zgesvd_ex.c.htm
Dear AllI want to run this example : http://software.intel.com/sites/products/documentation/doclib/mkl_sa/11/mkl_lapack_examples/zgesvd_ex.c.htmto do this i installed "composer_xe_2013.3.163" and...
View Articlemkl vs ipp for eigenvalues
HelloI have a signal processing task which the heaviest operation is finding the eigenvalues and eigenvectors of a 128x128 Hermitian matrix. I found routines both in ipp and in mkl. Which one will be...
View Articleproblems with MKL_DSS_DIAGONAL_SOLVE
Hello. I am using the following example (heavily inspired by mkl/examples/solverc/source/dss_sym_c.c) to try and solve a system on a very simple diagonal matrix. The code below works correctly, and the...
View ArticleNumber of non-zeros less than nRows
Hello. I have two very related questions that I hope you can answer. I am writing code that uses the MKL to get the LDL' decomposition of a matrix that is real and symmetric but, in general,...
View ArticleQ: dtrnlsp_init for initializing the solver of a nonlinear least squares...
Hello All,We're replacing our current solver for a non-linear least squares problem without constraints with the MKL version.First tried implementing it in a simple problem: F(x) : n = 6 → m =...
View ArticleUse Which Routine for Sparse Matrix-Sparse Vector Multiplication
I have a huge matrix with very few non-zero elements. Some of the columns and rows may also be completely zero. This matrix should be multiplied by a very long vector which has only few non-zero...
View Articledtrnlspbc_get() returns 0xbaadf00d in "iter" argument
I'm using MKL 11 (tried on 11.04 and 11.0.5) and I'm getting a bad return value upon the return of this function. The "iter" argument gets filled with the magic number value 0xbaadf00d, which means...
View ArticleCan I pass a subset of a matrix into another function in MKL?
I am trying to optimize a lot of matrix calculations in MKL that requires me to allocate large blocks of memory using something like :double* test_matrix = (double*)mkl_malloc(n * sizeof(double),...
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dcopy problem with very large arrays
I have run into a problem when using dcopy with very large arrays. Specifically, I am using dcopy to initialize a very large array to zero before doing other operations, and the dcopy is not setting...
View ArticleScalapack p*gemr2d return codes
Hi,I'm using the MKL Scalapack functions P*RGEM2D to distribute matrices between different contexts. Most MKL Scalapack functions take an 'info' argument to return various error information from the...
View ArticleMKL thread priorities
Hello All,In version 11 of the Linux-based MKL, is it possible to either:1) specify the pthread attributes to be used when creating any MKL threads,or2) have the MKL threads perform a callback to a...
View ArticleFor what reasons can mkl_free() fail?
I am working with Intel's MKL in C++ and I get a lot of runtime errors with themkl_free(some_matrix); call. Usually, it just hangs when it reaches the matrix. What are the reasons that can cause it to...
View Articlehow to make eigenvectors ( obtained from _geev ) orthorgonal?
I am looking for the eigenvectors & eigenvalues of a non-symmetric, complex-valued matrix. The matrix is a Hermitian matrix with some diagonal imaginary terms added, which is then non-hermitian....
View ArticleDoes mkl_dcsrmm require row-major matrices?
mkl_dcsrmm multiplies a CSR sparse matrix by a dense matrix, storing the result in a dense matrix.From what I can tell, this function expects the B and C dense matrices to be in row-major order, as...
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