High-availability super server
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United States of America Patent
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Issued Date -
May 16, 2002
app pub date -
Jan 4, 2002
filing date -
Feb 20, 1996
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for maintaining coherent data in a multiprocessor system having a plurality of processors coupled to main memory, where each processor has an internal cache which is externally unreadable outside the processor. The method includes requesting data associated with a memory location in main memory and determining if an external cache coupled to an application specific integrated circuit associated with a second processor contains a reference to the requested data. A snoop cycle is performed on the second processor if the external cache has a reference to the requested data, whereupon a determination is made as to whether the requested data has been modified.
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