Figure 4(a) shows the dynamic energy consumed by the
first-level cache evaluated in this work. Results have been
normalized to those of a set-associative cache in which all
ways are accessed. The Tag Filter Cache is able to reduce
the dynamic energy consumed by 48.1%, 65.8%, 73.2%,
and 74.9% for a tag filter with one, two, three and four
bits respectively. It can be seen that the marginal benefits
of adding additional bits to the filter are fewer with each
additional step.