Dynamic prefetching of hot data streams
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United States of America Patent
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Oct 25, 2011
Grant Date -
Mar 30, 2006
app pub date -
Nov 15, 2005
filing date -
Nov 25, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and system for creating and injecting code into a running program that identifies a hot data stream, and prefetching data elements in the stream so they are available when needed by the processor. The injected code identifies the first few elements in a hot data stream (i.e. the prefix), and prefetches the balance of the elements in the stream (i.e., the suffix). Since the hot data stream identification code and prefetch code is injected at run time, pointer related time-dependencies inherent in earlier prefetch systems are eliminated. A global deterministic finite state machine (DFSM) is used to help create conceptual logic used to generate the code injected into the program for prefix detection.
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