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Re: Building octave 3.8.2 from source on Ubuntu 14.04 for using multiple

From: Sunil Shah
Subject: Re: Building octave 3.8.2 from source on Ubuntu 14.04 for using multiple cores
Date: Thu, 4 Sep 2014 08:59:00 -0700


So, I can just switch blas/lapack for octave 3.8.1 binary package on Ubuntu 14.04 ? 


On Thu, Sep 4, 2014 at 12:59 AM, <address@hidden> wrote:
On Thursday, September 04, 2014 12:26 PM, Sunil Shah wrote:
I have built octave 3.8.2 from source on Ubuntu 14.04 (LTS) using
standard instructions.  I have installed libblas-dev, liblapack-dev and
libpcre3-dev.  I have also used apt-get build-dep octave to resolve
dependences.  The build works and passes the tests.

I see that the resulting executable does not use multiple cores on an
Amazon EC2 c3 16 core instance.  I have the same experience installing
3.8.1 binary package on 14.04 LTS.

To contrast that, I have built octave 3.6.4 from source on Mac OSX
10.9.2 using fink. Upon using octave-atlas-364-dev,  it can use multiple
cores efficiently for standard dense matrix operations.

I would ideally like to use a tuned matrix library such as atlas for
blas/lapack for octave 3.8.2.  Any pointers / help is appreciated.

Atlas is available via apt-get too; and so is openblas. The latter is said to be more optimized.

Maybe this page is of help

(Re)build your own if you want still better performance.


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