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. >