Re: [Octave 5.2.0 @ Ubuntu 20.04] Long duration of complex matrix inverse

[Dmitri A. Sergatskov]

On Sun, Mar 29, 2020 at 5:25 PM Thomas D. Dean <address@hidden> wrote:

On 2020-03-29 13:52, Thomas D. Dean wrote:

> I do not see atlas or blas in /usr/local/bin/octave

I don't know where my head is.
libblas.so.3.7.1 is linked in to liboctave.

 > ldd /usr/local/lib/octave/7.0.0/liboctave.so | grep blas
         libblas.so.3 => /usr/lib/x86_64-linux-gnu/libblas.so.3

I got similar timing if use reference blas.

You can try to start octave as:

OPENBLAS_NUM_THREADS=4 LD_PRELOAD=/usr/lib64/libopenblasp.so octave

(on Redhat/Fedora, liopenblasp is the name of the multithreaded openblas library,

adjust accordingly to your system)

Dmitri.

--

 

Tom Dean