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.
Did you find this white paper useful?
24 out of 50 users found this white paper useful
Related white papers
Nortel Secures Managed Care for Internet Traffic at ProMedica Health System
ProMedica Health System is a not-for-profit healthcare organization of more than 209 healthcare facilities in Ohio and Michigan. They needed to regulate and secure traffic on the organization's fractional DS-3...
Next-Generation Optical Transmission Fibers
The first part of this paper gives a brief introduction of modern optical transmission fiber technology. The second part of this paper illustrates detailed numerical analysis, lab tests, and field...
Layer 3 Malformed Packet Testing in MCI's Public IP Network
Malformed packets associated with routing protocols can cause undesirable consequences if not detected and contained properly as close to the originator as possible. This issue magnifies in scope and complexity...
Network Intrastructure: Getting Started with VoIP
IP/Ethernet networks are fast becoming an attractive and viable utility for supporting high-quality voice in a converged network. Bringing disparate voice and data systems together into a multi-service network can...
Internet Acceptable Use Policies: Navigating the Management, Legal and Technical Issues
Many organizations have discovered the hard way that unrestricted and unmanaged Internet access by employees can lead to dire consequences in the form of wasted time, lost productivity, misappropriation of...
The Real Cost of Spam
Unsolicited Commercial E-mail, or spam, is not just an annoying problem. It's a costly one. This paper examines the different cost impacts, both direct and indirect, that spam has on...
The Three Components of Optimizing WAN Bandwidth
One of the truths in the industry is that few organizations pay much attention to proactive network management of any type. However, the proactive optimization of WAN bandwidth will quickly...
