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cblas_dnrm2 much slower than cblas_ddot
Dear all,I run benchmarks on a sandy-bridge Intel processor (E5-4620) using Intel MKL 11.1. Here, I have found that cblas_dnrm2 is significantly slower (3.4 s) than the corresponding cblas_ddot call...
View Articlethreading for mkl_?bsrmv routines?
Linux, MKL 11.xAre the mkl_?bsrmv routines threaded? We're seeing threading if we use mkl_?csrmv routines. But when using mkl_?bsmrv routines we do not see threading.Link line is...
View ArticleBlocks of different sizes in ScaLAPACK?
I am performing a Cholesky factorization with Intel-MKL, which uses ScaLAPACK. I distributed the matrix, based on this example, where the matrix is distributed in blocks, which are of equal size (i.e....
View ArticleMultidimensional DFT and OpenMP
I'm working on a program that performs several 3 x 3d (N1xN2xN3) DFTs using the MKL DFT algorithm. I'm running most of the program in parallel using OpenMP and I'd like to get as much parallel...
View ArticlePARDISO generates different results
Dear all,I use PARDISO to solve a symmetric sparse matrix with size n=400,000 and number of nonzero=1,100,000. When I set the number of thread to one, I can get the same answer every time. But when I...
View ArticleEstimate PARDISO memory usage by matrix size
Dear all,I am running PARDISO to solve sparse symmetric indefinite matrices. Since matrices may be very large, we want to estimate how many memory PARDISO will use given matrix size n and number of...
View ArticleSwitching between threaded and non-threaded libraries
Hello,I have an application that uses Intel's MKL libraries. In some sections of this application calls to MKL are made in parallel areas. In these areas, I want to use the sequential version of the...
View ArticleLinpack Performance problem over V3 Processors
Hello Dears,I have a project with two type of computing nodes, Xeon V2 processors (16 nodes) and V3 processors(64 nodes). Installed Intel Parallel studio in one of the V2 computing nodes and got very...
View ArticleC interface to BLAS
Hello,I am running into an inconsistency in the header file mkl.h for BLAS functions being called from C. I finally used the "/E" option from the C compiler to dump the pre-processed source so I could...
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Some digits differ from serial to distibuted Cholesky
I am using the double precision routine in C for Cholesky. In order to check the result, I am running the serial version too. For smaller inputs, the results are same, but for a matrix 6500x6500, I am...
View ArticleMKL 11.2u3 not compatible with FFTW3 (3.3.3)?
Our application uses fftw 3.3.3 (fftw3.h). It has definitions for export_wisdom_to_filename and export_wisdom_from_filename. I do not see these definitions in the fftw3.h in the mkl include/fftw...
View ArticleMKL / PARDISO Multithreading Issue
Hello!I am using PARDISO for factorization of symmetrical complex matrices. Recently I downloaded evaluation library v. 11.2 upd3 and run a code that was developed for v.10 library some time ago. It...
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Attempted to read or write protected memory when calling VML functions
Hello,I build a small C# project that calculate some VML functions: Abs , Arg, Add, Mult, Cos, Sin I ran this functions in multi threads - about 3000 threads using .Net threadpool that use only 4...
View ArticleMKL does not respect affinity on master thread
This is follow-up/semi-related post to this rather long post: https://software.intel.com/en-us/comment/1825717#comment-1825717So like the title says: MKL does not respect affinity on the master thread....
View ArticleQuestion about the pivoting in numerical factorization in PARDISO
Dear Intel MKL R&Ds,I have a question about the pivoting in the numerical factorization in Pardiso solver. Let me explain in details. First, we have our own ordering and factorization code. Now,...
View ArticleVS 2015
hi.is any information available regarding the availability of a version of mkl that is compatible with the c++ compiler from vs2015? i'm currently planning to switch to 2015 from 2013 and i'd rather...
View ArticleIs there double complex interface of Iterative Sparse Solvers based on...
Dear MKL experts, I have to solve the sparse complex double symmetric equations in huge size. I am looking for iterative sparse solvers. I found that the MKL just provides RCI Interface Routines...
View ArticleCompatibility with visual studio 2015
Any plan to release a version that compatible with visual studio 2015 compiler?
View ArticleCan I use SCALAPACK library on the single machine (Xeon)?
Hi, All Experts, I'm wondering if I can use ScaLapack library on a single machine, since Scalapack is for distributed arch. If it is possible, would you please tell me how to set up the running...
View Article1D Convolution
Hello,I need to compute the 1d convolution. Intel MKL offers two basic strategies to do this.1) Explicit implementation of the convolution theorem by the user i.e. perform DFT's on the input data and...
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