Transactional memory for distributed shared memory multi-processor computer systems
First Claim
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1. A multi-processor computer system comprising:
- a plurality of processors;
a plurality of caches, each of said plurality of caches operatively connected to one of said plurality of processors;
a first system control unit operatively associated with one of said plurality of processors and operatively connected to one of said plurality of caches, said system control unit having a cache flushing engine operatively connected to said one of said plurality of caches;
a second system control unit operatively associated with said first system control unit and operatively connected to said cache flushing engine;
a memory operatively connected to said second system control unit; and
said first system control unit responsive to an update of one of said caches associated therewith to flush said update to said second system control unit and assure said update is entered into said memory.
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Abstract
A cache coherent distributed shared memory multi-processor computer system is provided which supports transactional memory semantics. A cache flushing engine and temporary buffer allow selective forced write-backs of dirty cache lines to the home memory. A flush can be performed from the updated cache to the temporary buffer and then to the home memory after confirmation of receipt or from the updated cache to the home memory directly with the temporary buffer holding the old data until confirmation that the home memory contains the update.
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6 Claims
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1. A multi-processor computer system comprising:
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a plurality of processors;
a plurality of caches, each of said plurality of caches operatively connected to one of said plurality of processors;
a first system control unit operatively associated with one of said plurality of processors and operatively connected to one of said plurality of caches, said system control unit having a cache flushing engine operatively connected to said one of said plurality of caches;
a second system control unit operatively associated with said first system control unit and operatively connected to said cache flushing engine;
a memory operatively connected to said second system control unit; and
said first system control unit responsive to an update of one of said caches associated therewith to flush said update to said second system control unit and assure said update is entered into said memory. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification