Re: Instructions for Installing BLAS and LAPACK library on Octave 5.2.0

Hi Ian,

Thanks for your reply.
I use the zip file rather than the executable file for octave. Maybe I need
to try the Octave exe file for the multithreading purpose as you suggested.
As far as I understand, I'm gonna proceed with the following. Kindly advise
if I need to make any changes.


   - Downloading Octave 5.2.0-64 bit executable from the official GNU
   Octave website(
   https://www.gnu.org/software/octave/download.html#ms-windows) for Win 10
   - Installing the same and checking with the default OPENBLAS library.
   - Assigning the value for the environment variable  OPENBLAS_NUM_THREADS
   = "the number of processors we need to utilize"

Thanks for your time and for the information provided.
Have a great day.

best regards
Ilaya bharathi


On Fri, Sep 25, 2020 at 8:29 PM Ian McCallion <[email protected]>
wrote:

> On Friday, 25 September 2020, Ilaya Bharathi <[email protected]>
> wrote:
>
>> Hi team,
>>
>> I'm looking for Instructions to install libraries for multithreading
>> purposes on Octave 5.2.0 on the Windows 10 operating system.
>>
>> After some research, I found BLAS and LAPACK libraries would help to
>> implement multithreading. Unfortunately, I wasn't able to find the proper
>> instructions to configure the libraries I need.
>>
>
> The openblas library is included with your octave installation and
> configured for use (assuming you used the installation exe program rather
> than the zip file).
>
> This means if you have a program such as:
>    a = rand(1, 1000000);
>    b = a*a;
>
> then Octave will automatically use openBLAS to do the calculations. By
> default openblas uses all processor threads. You can configure the number
> of threads using the environment variable OPENBLAS_NUM_THREADS.
>
> Cheers Ian
>