Stack Overflow
Stack Overflow

Questions tagged [openblas]

Questions regarding OpenBLAS, an open source library that implements BLAS API and has hand-crafted optimizations for specific processor types.

OpenBLAS is an open source implementation of BLAS, the Basic Linear Algebra Subprograms library, optimized for high performance on multi-core x86-64 processors. It was forked from the GotoBLAS2-1.13 BSD version and was tuned to have performance similar to Intel MKL.

277 questions
0
votes
1 answer

Armadillo with wxWidgets: polyfit fails to link

I have been using wxWidgets to make visual examples of a few of Armadillo's functions. Both matrix transpose and FFT worked perfectly, but when I tried to do a simple polyfit call, the linker fails with a series of errors like these: > error…
James
  • 49
  • 1
  • 9
0
votes
1 answer

Using MPI with Armadillo C++ for parallel diagonalization

There has been a post regarding usage of MPI with Armadillo in C++: here My question is, wether Lapack and OpenBlas did implement MPI support? I could not anything so far in their documentations. There seems to be a different library called…
Qant123
  • 141
  • 1
  • 6
0
votes
0 answers

How is NumPy working with a null OpenBLAS installation?

I've been fiddling around, trying to find my way to a maximally performant installation of NumPy on my new Apple MacBook Air M2 and have arrived at this NumPy configuration: (env) dbanas@Davids-Air prj % python3 -c "import numpy as np;…
dbanas
  • 1,707
  • 14
  • 24
0
votes
1 answer

Cannot install OpenBLAS using "make" command

I'm trying to install OpenBLAS for Rindow Neural Network Library to build PHP machine learning environment. I found several step-by-step introductions but they are all different and not specific enough. So I'm asking help. What I've done…
GatesPlan
  • 465
  • 1
  • 4
  • 17
0
votes
1 answer

OpenBLAS Warning : Detect OpenMP Loop and this application may hang. Please rebuild the library with USE_OPENMP=1 option

I have ppc64le arch. Can you help me how to setup USE_OPENMP=1 ?
neetu sigger
  • 11
  • 1
  • 6
0
votes
1 answer

Apache Spark - OpenBlas and Lapack are not working in Ubuntu 20.04

So, I am using spark 3.1.3 on standalone mode with 16 workers I have done all the necessary steps described in the Spark documentation but the native libraries still are not working. I have included the below dependency in the pom…
Des0lat0r
  • 482
  • 3
  • 18
0
votes
1 answer

Blas++ cannot find OpenBLAS in CMake on Windows

I am trying to use BLAS++ with OpenBLAS. Everything works fine on Linux but now I want to make my lib a bit more cross-platform. I have this minimal CMakeLists.txt cmake_minimum_required(VERSION 3.12) project(test) find_package(Git…
Steve Wolligandt
  • 71
  • 2
  • 7
0
votes
1 answer

Openblas: cblas.h is not found when using Xcode

I encounter a problem when using cblas. I am new to use C++ to do numerics and I know Openblas is one of the famous library to perform linear algebra computation. I use brew install openblas in my M1 Macbook. When the installation finishes, I…
Ricky Pang
  • 101
  • 3
0
votes
2 answers

Multithreaded OpenBlas degrades performance

I have a driver cpp file that calls cblas_dgbmv function with proper arguments. When I build OpenBLAS with "make", dgbmv runs with 8 threads automatically (multithreaded dgbmv is invoked in gbmv.c interface and I assume this is a default…
selinnilesy
  • 11
  • 2
0
votes
1 answer

C++ how to set environment variable so OpenBLAS runs multithreaded

The author recommends the following: https://github.com/xianyi/OpenBLAS Setting the number of threads using environment variables Environment variables are used to specify a maximum number of threads. For example, export…
noobquestionsonly
  • 181
  • 2
  • 11
0
votes
1 answer

R CMD SHLIB External Library Linking Issue (on Ubuntu/Linux)

I have a C file that I am trying to turn into a shared object to be read into R. I want to link that SO with OpenBLAS. I am compiling R from source (and linking it to OpenBLAS) since I have read that there is an environment variable that needs to be…
Leigh K
  • 561
  • 6
  • 20
0
votes
0 answers

CMake can't find BLAS on MSYS2

I am trying to compile this software in the MSYS2 environment on Windows. This is the line looking for the packages: FIND_PACKAGE(BLAS REQUIRED) FIND_PACKAGE(LAPACK REQUIRED) SET(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} ${BLAS_LIBRARIES}…
Foad S. Farimani
  • 12,396
  • 15
  • 78
  • 193
0
votes
1 answer

Parallelization limit of OMP in DGEMM

For the following code extended from OpenMP with BLAS Program bench_dgemm Use, Intrinsic :: iso_fortran_env, Only : wp => real64, li => int64 Use :: omp_lib integer, parameter :: dp = selected_real_kind(15, 307) Real( dp…
AlphaF20
  • 583
  • 6
  • 14
0
votes
0 answers

MSYS2 installer

After installing MSYS2 installer 32bit for Windows 10, I followed the instructions given on http://scipy.github.io/devdocs/building/windows.html#building-openblas to build OpenBLAS. After an apparent successful installation, I open a MSYS2 MinGW…
Chi Ho
  • 11
  • 2
0
votes
1 answer

How to import matrix into armadillo using binary files?

I am trying to import a matrix generated in MATLAB into armadillo. For example, I have a matrix "A" which is 100x1 double. I used information from a previous question on stackoverflow to generate a binary file using MATLAB: % Generate…
Abdulla
  • 5
  • 1
1 2 3
…
18 19