Bandwidth Issues White Papers
Feedback Directed Prefetching: Improving the Performance and Bandwidth-Efficiency of Hardware Prefetchers
Overview High performance processors employ hardware data prefetching to reduce the negative performance impact of large main memory latencies. While prefetching improves performance substantially on many programs, it can significantly reduce performance on others. Also, prefetching can significantly increase memory bandwidth requirements. This paper proposes a mechanism that incorporates dynamic feedback into the design of the prefetcher to increase the performance improvement provided by prefetching as well as to reduce the negative performance and bandwidth impact of prefetching. The mechanism estimates prefetcher accuracy, prefetcher timeliness, and prefetcher-caused cache pollution to adjust the aggressiveness of the data prefetcher dynamically. This paper introduces a new method to track cache pollution caused by the prefetcher at run-time.
| Publisher | Microsoft | File Format | |
|---|---|---|---|
| Date Published | May 2007 | ||
| Format | White Papers | ||
| Topics | |||
-
Did you find this white paper useful? 0 out of 1 users found this white paper useful
White Paper RSS
Download
Register
