INCREASING TCP RE-TRANSMISSION PROCESS SPEED

Title:

INCREASING TCP RE-TRANSMISSION PROCESS SPEED

Document Type and Number:

WIPO Patent Application WO2005060580

Kind Code:

A3

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 (S2). 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 (S11, S6) for a majority of inbound DDP segments in the Fast connection before sending a TCP acknowledgement (Ack) confirming segment reception.

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Inventors:

MAKHERVAKS VADIM (IL)
MACHULSKY ZORIK (IL)
BIRAN GIORA (IL)
SHALEV LEAH (IL)

Application Number:

PCT/US2004/040758

Publication Date:

October 06, 2005

Filing Date:

December 06, 2004

Export Citation:

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Assignee:

IBM (US)
MAKHERVAKS VADIM (IL)
MACHULSKY ZORIK (IL)
BIRAN GIORA (IL)
SHALEV LEAH (IL)

International Classes:

G06F15/16; H04L29/06; (IPC1-7): G06F15/16

Foreign References:

US20050068896A1	2005-03-31
US20030172342A1	2003-09-11

Other References: