Method and computer system for speculatively closing pages in memory
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United States of America Patent
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May 14, 2002
Grant Date -
N/A
app pub date -
Mar 25, 1999
filing date -
Mar 25, 1999
priority date (Note) -
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Abstract
The present invention provides a method and an apparatus for addressing a main memory unit in a computer system which results in improved page hit rate and reduced memory latency by only keeping open some recently used pages and speculatively closing the rest of the pages in the main memory unit. In a computer system with 64 banks and 2 CPUs, only 8 banks may be kept open and the remaining 56 banks are kept closed. Keeping only 8 banks open will not reduce the page hit frequency significantly, but will allow most accesses that are not page hits to access banks that are already closed, so that they are not slowed down by open banks. Thus, the page hit rate is increased and the miss rate is reduced.
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