Re: current development

[Joseph Heled]

Just for the record: 450924 evaluations/second.

-Joseph

On Wed, 4 Dec 2019 at 12:49, Joseph Heled <address@hidden> wrote:
>
> I set number of threads to 4
>
> Rolled a cube decision
>
> world-class: 2-ply for move/cube-action  : 18 minutes
> expert (0ply) moves/ 2-ply cube actions:  2 minutes.
> exper: 0 ply both 0.041
>
> Still seems something is amiss.
>
> -Joseph
>
> On Wed, 4 Dec 2019 at 12:07, Philippe Michel <address@hidden> wrote:
> >
> > On Wed, Dec 04, 2019 at 09:46:09AM +1300, Joseph Heled wrote:
> >
> > > All I know is that I installed gnubg from the repository (GNU
> > > Backgammon 1.06.002) and the rollouts speed seemed terrible.
> > >
> > > Do I need to do something in the GUI to enable multi-threading? (and I
> > > hope that by multi-threading we are talking about multi-core, not just
> > > threading, which does not help)
> >
> > You may need to change the number of evaluation threads in the
> > Settings|Other window. The default is 1.
> >
> > This is really multi-threading, It is up to you to choose a number of
> > threads adapted to your processor. Maybe the number of cores, or that
> > number minus 1, or a fraction of that if you intent to run multiple
> > rollouts or 4-ply analyses in parallel.
> >
> > FWIW, I had the opportunity, at a previous job, to try to run gnubg on a
> > Knights Landing processor with 256 threads. It didn't run very
> > efficiently, maybe 100 times faster that with one thread, but it ran
> > without crashes or lock-ups or similar issues.
> >