Cache memory containing extra status bits to indicate memory regions where logging of data should occur
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United States of America Patent
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Sep 9, 1997
Grant Date -
N/A
app pub date -
Jul 1, 1994
filing date -
Jul 1, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides a digital computer memory cache organization for efficient data logging, log-based copy and rollback, high-performance I/O, network switching and multi-cache consistency maintenance. The cache organization implements efficient selective cache write-back, mapping and transferring of data. Write or store operations to cache lines tagged as logged are written through to a log block builder associated with the cache. Non-logged store operations are handled local to the cache, as in a writeback cache. The log block builder combines write operations into data blocks and transfers the data blocks to a log splitter. A log splitter demultiplexes the logged data into separate streams based on address.
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