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Abstract
Extensive research has been done in prefetching
techniques that hide memory latency in microprocessors leading
to performance improvements. However, the energy aspect of
prefetching is relatively unknown. While aggressive prefetching
techniques often help to improve performance, they increase energy
consumption by as much as 30% in the memory system. This
paper provides a detailed evaluation on the energy impact of hardware
data prefetching and then presents a set of new energy-aware
techniques to overcome prefetching energy overhead of such
schemes. These include compiler-assisted and hardware-based
energy-aware techniques and a new power-aware prefetch engine
that can reduce hardware prefetching related energy consumption
by 7–11 . Combined with the effect of leakage energy reduction
due to performance improvement, the total energy consumption
for the memory system after the application of these techniques
can be up to 12% less than the baseline with no prefetching.
05291706.pdf
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发表于 2011-1-30 11:09:41
