Deterministic message processing in a direct memory access adapter

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United States of America Patent

PATENT NO 9158718
APP PUB NO 20150193364A1
SERIAL NO

14148975

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Abstract

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Deterministic message processing in a direct memory access (DMA) adapter includes the DMA adapter incrementing from a sub-head pointer, a sub-tail pointer until encountering an out-of-sequence packet. The DMA adapter also consumes packets between the sub-head pointer and the sub-tail pointer including incrementing with the consumption of each packet, the sub-head pointer until determining that the sub-head pointer is equal to the sub-tail pointer. In response to determining that the sub-head pointer is equal to the sub-tail pointer, the DMA adapter determines whether the head pointer is pointing to the next in-sequence packet. If the head pointer is pointing to the next in-sequence packet, the DMA adapter resets the sub-head pointer and the sub-tail pointer to the head pointer. If the head pointer is not pointing to the next in-sequence packet, the DMA adapter resets the sub-head pointer and the sub-tail pointer to the next in-sequence packet.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Blocksome, Michael A Rochester, US 158 4257

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