|
From: | Ceral Paquet |
Subject: | [Octave-bug-tracker] [bug #45208] mxe-octave: compile with OpenBLAS with LAPACK enabled |
Date: | Fri, 29 May 2015 02:01:58 +0000 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:37.0) Gecko/20100101 Firefox/37.0 Iceweasel/37.0.2 |
URL: <http://savannah.gnu.org/bugs/?45208> Summary: mxe-octave: compile with OpenBLAS with LAPACK enabled Project: GNU Octave Submitted by: octavebugs Submitted on: Fri 29 May 2015 02:01:57 AM GMT Category: None Severity: 3 - Normal Priority: 5 - Normal Item Group: None Status: None Assigned to: None Originator Name: Originator Email: Open/Closed: Open Discussion Lock: Any Release: 4.0.0-rc4 Operating System: GNU/Linux _______________________________________________________ Details: I noticed with some linear algebra methods that only 1 of my CPU cores was being used despite using Openblas and specifiying export OPENBLAS_NUM_THREADS=2. A'*A uses both cores but chol, svd do not. Openblas provides some of these LAPACK functions. I ran a little test with chol and svd and noticed they both run about 1.5 times faster with NO_LAPACK=0 in src/openblas.mk - both CPUs are used rather than only 1 when NO_LAPACK=1. I can't think of a downside. _______________________________________________________ Reply to this item at: <http://savannah.gnu.org/bugs/?45208> _______________________________________________ Message sent via/by Savannah http://savannah.gnu.org/
[Prev in Thread] | Current Thread | [Next in Thread] |