Information processing apparatus, system controller, local snoop control method, and local snoop control program recorded computer-readable recording medium
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United States of America Patent
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Mar 2, 2010
Grant Date -
Mar 2, 2006
app pub date -
Dec 28, 2004
filing date -
Aug 31, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to an information processing apparatus equipped with a plurality of storage units and a plurality of system controllers sharing communication control on the plurality of storage units. For shortening the processing time needed for a memory access request, each of the plurality of system controllers includes a local snoop control unit for, when receiving the memory access request, retrieving target data on the memory access request from the storage unit, this system controller takes charge of, in parallel with transmission/reception processing on a retrieval instruction in a broadcast transmitting/receiving unit or processing in a global snoop control unit and a memory access control unit for fulfilling the memory access request when the target data is retrieved by the local snoop control unit and a predetermined condition reaches satisfaction.
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