The idea here is that the dynamic rules are defined by an entire set of parameters, and that we want a quick way to allow OMPI to ignore them all. If we follow your suggestion and remove coll_tuned_use_dynamic_rules, then turning on/off dynamic rules involves a lot of changes into the MCA file (instead of a single change with coll_tuned_use_dynamic_rules)
George. On Mon, Jun 27, 2022 at 8:40 AM GERMAIN, Florent via devel < devel@lists.open-mpi.org> wrote: > Hi, > > I wonder if coll_tuned_use_dynamic_rules MCA parameter is still useful. > > Remainder of this MCA parameter behavior: > Default value: false > When activated, it allows the use of dynamic rules of the coll/tuned > component (algorithm choice and parameters through MCA parameters). > > Is there any need or argument for keeping this parameter? (except “it was > here yesterday”) > > The issue encountered here is that, with verbose=0 and > coll_tuned_use_dynamic_rules=false, all the MCA parameters driving the > dynamic behavior of the coll/tuned component are silently ignored. > Forgetting to switch it on leads to a silent unwanted behavior, what is > kind of annoying. > > Is there something I miss about this MCA parameter? > > I suggest removing the coll_tuned_use_dynamic_rules MCA parameter or at > least have its default value to true. > > > > I can make the changes and open a PR If we want to remove this parameter. > > > > Regards, > > *Florent Germain* > > Ingénieur de développement > > florent.germ...@atos.net > > 1 Rue de Provence > > 38130 Echirolles > > Atos.net > > [image: Atos] > > >
