RDMA network interface controller with cut-through implementation for aligned DDP segments
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United States of America Patent
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Issued Date -
Jun 16, 2005
app pub date -
Dec 11, 2003
filing date -
Dec 11, 2003
priority date (Note) -
Abandoned
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Abstract
An RNIC implementation that performs direct data placement to memory where all segments of a particular connection are aligned, or moves data through reassembly buffers where all segments of a particular connection are non-aligned. The type of connection that cuts-through without accessing the reassembly buffers is referred to as a 'Fast' connection because it is highly likely to be aligned, while the other type is referred to as a 'Slow' connection. When a consumer establishes a connection, it specifies a connection type. The connection type can change from Fast to Slow and back. The invention reduces memory bandwidth, latency, error recovery using TCP retransmit and provides for a 'graceful recovery' from an empty receive queue. The implementation also may conduct CRC validation for a majority of inbound DDP segments in the Fast connection before sending a TCP acknowledgement (Ack) confirming segment reception.
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Patent Owner(s)
Patent Owner | Address | |
---|---|---|
INTERNATIONAL BUSINESS MACHINES CORPORATION | NEW ORCHARD WAY ARMONK NY 10504 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Biran, Giora | Zichron-Yaakov, IL | 107 | 2649 |
Machulsky, Zorik | Nahariya, IL | 52 | 909 |
Makhervaks, Vadim | Yokneam, IL | 84 | 1970 |
Shalev, Leah | Zichron Yaakov, IL | 119 | 2290 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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