Limitless Directories: A Scalable Cache Coherence Scheme
Name
MIT-LCS-TM-448.pdf
Size
743.17 KB
Format
Adobe PDF
Checksum (MD5)
f8765b39a3ad83e7fe784f420ad91c70
Author(s)
Chaiken, David
Kubiatowicz, John
Agarwal, Anant
Date Issued
June 1991
Series/Report no.
MIT-LCS-TM-448
Abstract
Caches enhance the performance of multiprocessors by reducing network traffic and average memory access latency. However, cache-based systems must address the problem of cache coherence. We propose the LimitLESS directory protocol to solve this problem. The LimitLESS scheme uses a combination of hardware and software techniques to realize the performance of full-map directory with the memory overhead of limited directory. This protocol is supported by Alewife, a large-scale multiprocessor. We describe the architectural interfaces needed to implement the LimitLESS directory, and evaluate its performance though simulations of the Alewife machine.
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