#1512: LoopControl slows down with time when exloring new tilings ---------------------+------------------------------------------------------ Reporter: rhaas | Owner: eschnett Type: defect | Status: new Priority: major | Milestone: Component: Carpet | Version: development version Resolution: | Keywords: LoopControl ---------------------+------------------------------------------------------
Comment (by rhaas):
is it possible that LoopControl gets confused since there is not obviously good way of tiling this? In slab the loop is just a copy and I would (naively) expect that since this is completely memory bandwidth dominated it does not matter how many threads compete in which manner for the limited bandwidth.
I attach LoopControl's statistics output for the parfile. As one can see there are very many params that loopcontrol explores. Since the loop in questions is small (just the boundary) the time to explore may well be comparable to the full runtime of the loop.