Information Technology Reference
In-Depth Information
F
IG
. 32. Energy consumption (
Bottom Up Retrieval Scheme
).
F
IG
. 33. Energy consumption (
Top Down Retrieval Scheme
).
7.2.3.4 Number of Passes.
The number of passes directly relates to the
number of conflicts. As a result, as the number of requested data elements and/or
the number of channels increases, one should expect to observe more passes over
the parallel air channels. This by default implies higher access latency. An increase
in the number of channels implies an increase in the number of conflicts, and hence
a higher possibility of unavoidable conflicts, which in turn results in an increase
in the number of passes.
Figure 34
demonstrates these facts. Interestingly, when the
number of requested data elements is large, the number of passes exceeds the number
of channels available. This is due to the priority order of the heuristics used in the
bottom up retrieval scheme
—the proposed method tries to reduce the amount of
