Just for the record: 450924 evaluations/second. -Joseph
On Wed, 4 Dec 2019 at 12:49, Joseph Heled <jhe...@gmail.com> 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 <philippe.mich...@free.fr> 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. > >