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

[Thomas D. Dean]

On 2020-03-29 14:40, Dmitri A. Sergatskov wrote:
> On Sun, Mar 29, 2020 at 5:25 PM Thomas D. Dean <address@hidden
> <mailto: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.

I do not have lib*blasp.so except in python3.6 and maple2019
directories.  (Neither work).

I cloned openblas.  Now, build it and rebuild octave.  Back later.

Tom Dean