Re: Parallel package suggestion

Olaf Till <[email protected]> Wed, 10 Feb 2021 19:53:36 +0100

Newsgroups	gmane.comp.gnu.octave.maintainers
Message-ID	<20210210185336.GB24587@till>

On Sat, Feb 06, 2021 at 12:46:40PM -0600, vrozos wrote:
> Regarding Parallel package [1], I have a suggestion.  On my understanding
> (from applications on a single machine), Parallel starts Octave sub-engines.
> When the whole job is finished, the sub-engines do not die. This can create
> problems in cases where a kind of re-initialization is needed.
> 
> Consider this case. I am using Parallel along with the expansion of the
> Genetic Algorithm package for GNU Octave that supports parallelization and
> bounds [2]. After finishing the first optimization, I want to change the
> loss-function. In this case, it seems that the sub-engines are not informed
> about the change. They keep using the version of the loss-function they
> first encountered.
> 
> I would suggest adding a function to Parallel package that would perform
> some kind of re-initialization of the created sub-engines, or at least kill
> them.

But there is such a function:

https://octave.sourceforge.io/parallel/package_doc/parcellfun_005fset_005fnproc.html#XREFparcellfun_005fset_005fnproc

Olaf

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