As happened in the first-level cache, which was
previously discussed, the reduction distributes evenly across
all the studied applications. The trend shows that there is
still room for improvement, but there has to be a limit to
how big the tag array can be. In comparison, the PS-Cache,
Way-Prediction and WayGuard access 9.85, 12.7 and 4.34
respectively. Way-Prediction, which works really well for
the L1 cache, performs poorly in lower levels of the cache
hierarchy, since L1 filters many of the processor accesses, thus
application locality is much poorer.