| Publisher | University of Texas | ||
|---|---|---|---|
| Format | 188.9KB PDF | Date added | 08 May 2007 |
| Topics | Processors, Parallel Processing | ||
| Downloads | 13 | ||
Runahead execution is a technique that improves processor performance by pre-executing the running application instead of stalling the processor when a long-latency cache miss occurs. Previous research has shown that this technique significantly improves processor performance. However, the efficiency of runahead execution, which directly affects the dynamic energy consumed by a runahead processor, has not been explored. A runahead processor executes significantly more instructions than a traditional out-of-order processor, sometimes without providing any performance benefit, which makes it inefficient. This paper describes the causes of inefficiency in runahead execution and proposes techniques to make a runahead processor more efficient, thereby reducing its energy consumption and possibly increasing its performance.
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