On Tue, Apr 03, 2018 at 09:50:19AM -0400, Alan Stern wrote: > On Mon, 2 Apr 2018, Paul E. McKenney wrote: > > > > > I will look at this more later, reaching end of both battery and useful > > > > attention span... > > > > Like the following, perhaps? > > > > Thanx, Paul > > > > ------------------------------------------------------------------------ > > > > s390 > > > > include "fences.cat" > > include "cos.cat" > > > > (* Fundamental coherence ordering *) > > let com = rf | co | fr > > acyclic po-loc | com as coherence > > > > (* Atomic *) > > empty rmw & (fre;coe) as atom > > > > (* Fences *) > > let mb = [M] ; fencerel(Mb) ; [M] > > > > (* TSO with multicopy atomicity *) > > let po-ghb = ([R] ; po ; [M]) | ([M] ; po ; [W]) > > acyclic mb | po-ghb | fr | rf | co as sc > > Yes, that should work okay (apart from issues related to ordering of > atomic accesses). > > By the way, what does that last "sc" stand for? Surely not Sequential > Consistency! You might consider renaming it to "tso-mca". Good point, fixed. But it is the closest to SC in commercial computing systems, for whatever that is worth. ;-) Thanx, Paul
