I am trying to enable multithreading/multiprocessing in an Anaconda installation of Numpy. My test program is the following: import os import numpy as np from timeit import timeit size = 1024 A = ...

I originally had some code that operates on very large arrays using for loops. I wanted to see if I can speed it up with numpy and numba and tried 4 incremental steps to get it faster. Setup: from ...

I am facing a problem now, unable to run any program in the cluster. It gives error. OpenBLAS blas_thread_init: pthread_create: Resource temporarily unavailable OpenBLAS blas_thread_init: RLIMIT_NP...

I have installed pyenv on Mac using brew install pyenv. I want to run a python project which requires installation of scipy==1.5.4. I tried installing it using the command pip3 install scipy==1.5.4...

I'm trying to build R-devel / R-patched. I've read some links, connected with steps for doing this. 1) https://www.r-bloggers.com/2022/01/building-r-4-2-for-windows-with-openblas/ 2) https://www.r-...

I am installing Scipy-0.16.1 on Ubuntu 14.04 OpenBLAS_0.2.18 and Numpy-1.11.0 have been installed with no issues. Scipy-0.16.1.tar.gz has been downloaded site.cfg was copied and un-commented t...

I am working on a program that I need to simulate program that called OpenBLAS functions with gem5 in SE mode. My code(in C) is as below #include <cblas.h> #include <stdio.h> void main...

After spending a huge amount of time on building the ATLAS from the source code, I found that libopenblas and libatals in the OpenSUSE 13.1 repository. My questions are Does that easy-install (wi...

Like many others, I've bought myself a new Ryzen CPU. I need to use Anaconda Python for my PhD (together with Tensorflow etc). Since Anaconda now comes pre-packaged with MKL which is slow on AMD CP...

Please, I do need a light here. I want to install numpy using a good BLAS/LAPACK lib on Windows, but absolutely no page explains the process well enough. It seems OpenBLAS is a good and fast option...

When I run R I get: dyld: Library not loaded: /usr/local/opt/openblas/lib/libopenblasp-r0.2.20.dylib Referenced from: /usr/local/Cellar/r/3.5.0_1/lib/libR.dylib Reason: image not found Abort tra...

I create two matrices A and B of the same dimension. A contains larger values than B. The matrix multiplication A %*% A is about 10 times faster than B %*% B. Why is this? ## disable openMP libr...

I've noticed that base::chol() severely slows down when the matrix contains many small elements. Here is an example: ## disable openMP library(RhpcBLASctl); blas_set_num_threads(1); omp_set_num_th...

Based on the famous check_blas.py script, I wrote this one to check that theano can in fact use multiple cores: import os os.environ['MKL_NUM_THREADS'] = '8' os.environ['GOTO_NUM_THREADS'] = '8'...

I'd like to know if it's possible to change at (Python) runtime the maximum number of threads used by OpenBLAS behind numpy? I know it's possible to set it before running the interpreter through t...

I try to set "export OPENBLAS_NUM_THREADS=1" as this document suggests. But I found a strange phenomenon that setting this significantly impairs the performance of my RL algorithms(I've done some t...

I am working on Windows 10 and CMake 3.14.1. I am trying to build OpenCV (Version 4.0.1) myself, since I need the contrib modules and the SFM module. I downloaded a prebuilt version of openBLAS 0....

I am trying to install numpy with OpenBLAS , however I am at loss as to how the site.cfg file needs to be written. When the installation procedure was followed the installation completed without ...

I am running a Python 3.6 script as multiple separate processes on different processors of a parallel computing cluster. Up to 35 processes run simultaneously with no problem, but the 36th (and an...

When I try to import numpy, I get the following error: /usr/local/lib/python2.7/dist-packages/numpy/linalg/__init__.py in <module>() 49 from .info import __doc__ 50 ---> 51 from .linal...

I have this dependency: blas = "0.18.1" During building this simple program (no types used de facto in the program): extern crate blas; use blas::c::*; I get these errors: error: linking wit...

When using Dask with Dask array I suddenly get the following error and my kernel that dies / restarts. The console says: BLAS : Program is Terminated. Because you tried to allocate too many mem...

>>> import numpy # OK! >>> import scipy # OK! >>> import theano # warning WARNING (theano.tensor.blas): Failed to import scipy.linalg.blas, and Theano flag blas.ldflags i...

Is it possible to install openblas via apt-get like sudo apt-get install openblas-dev? Seems on ubuntu 14.04 it can't find it. sudo apt-get install openblas-dev Reading package lists... Don...

When I set a ulimit -v on a powerful machine I'm working on (48 × Intel(R) Xeon(R) CPU E7-4860 v2 @ 2.60GHz, 2 TB RAM, Red Hat Enterprise Linux Server release 6.7), python fails to import numpy whe...