公开(公告)号：EP1609063A4

公开(公告)日：2009-03-11

申请号：EP03816813

申请日：2003-07-21

Applicant: IBM

Inventor： FREIMUTH DOUGLAS ,  MRAZ RONALD ,  NAHUM ERICH ,  PRADHAN PRASHANT ,  SAHU SAMBIT ,  TRACEY JOHN

IPC: G06F11/00 ,  H04B1/74 ,  H04L29/06 ,  H04L29/14

CPC classification number: H04L69/16 ,  H04B1/74 ,  H04L1/1809 ,  H04L1/1835 ,  H04L1/1874 ,  H04L69/12 ,  H04L69/161 ,  H04L69/163 ,  H04L69/40

Abstract: The present invention provides a method, computer program product, and data processing system for efficiently recovering state and performing failover of a network offload engine (904). The present invention distinguishes between the hard state and the soft state of a protocol. Hard state is state information that, when lost, leads to incorrect protocol behavior. Soft state is state information that may be lost or become inconsistent without loss of correctness. The present invention ensures correctness by always being able to recover (1002) the hard state of the protocol. A preferred embodiment of the present invention performs a failover of a network offload engine (904) by temporarily blocking (908) the reception of network packets, recovering (1002) hard state from host information, resuming network operation using a substitute network offload engine (906), and recovering (1008) soft state from the subsequent network activity.

公开(公告)号：WO2006019512B1

公开(公告)日：2006-05-18

申请号：PCT/US2005022348

申请日：2005-06-23

Applicant: IBM

Inventor： FREIMUTH DOUGLAS M ,  HU ELBERT C ,  MRAZ RONALD ,  NAHUM ERICH M ,  PRADHAN PRASHANT ,  SAHU SAMBIT ,  TRACEY JOHN M

IPC: H04L29/06 ,  H04L12/56

CPC classification number: H04L69/166 ,  H04L49/90 ,  H04L49/901 ,  H04L69/161 ,  H04L69/163

Abstract: A number of improvements in network adapters that offload protocol processing from the host processor are provided. Specifically, a mechanism for improving connection establishment in a system utilizing an offload network adapter (730) is provided. The connection establishment mechanism provides the ability to offload connection establishment (1030) and maintenance of connection state information to the offload network adapter (730). As a result of this offloading of connection establishment (1030) and state information maintenance, the number of communications needed between the host system (710) and the offload network adapter (730) may be reduced. In addition, offloading of these functions to the offload network adapter (730) permits bulk notification of established connections and state information to the host system (710) rather than piecemeal notifications as is present in known computing systems.

Abstract translation: 提供了从主机处理器卸载协议处理的网络适配器的许多改进。 具体地，提供了一种用于改善利用卸载网络适配器（730）的系统中的连接建立的机制。 连接建立机制提供将连接建立（1030）卸载并将连接状态信息维护到卸载网络适配器（730）的能力。 作为连接建立（1030）的卸载和状态信息维护的结果，可以减少主机系统（710）和卸载网络适配器（730）之间所需的通信次数。 此外，将这些功能卸载到卸载网络适配器（730）允许向主机系统（710）批量通知所建立的连接和状态信息，而不是如已知的计算系统中存在的分段通知。

公开(公告)号：CA2573162C

公开(公告)日：2014-02-04

申请号：CA2573162

申请日：2005-06-23

Applicant: IBM

Inventor： FREIMUTH DOUGLAS M ,  HU ELBERT C ,  MRAZ RONALD ,  NAHUM ERICH M ,  PRADHAN PRASHANT ,  SAHU SAMBIT ,  TRACEY JOHN M

IPC: H04L29/06 ,  H04L12/56

Abstract: A number of improvements in network adapters that offload protocol processing from the host processor are provided. Specifically, a mechanism for improving connection establishment in a system utilizing an offload network adapter (730) is provided. The connection establishment mechanism provides the ability to offload connection establishment (1030) and maintenance of connection state information to the offload network adapter (730). As a result of this offloading of connection establishment (1030) and state information maintenance, the number of communications needed between the host system (710) and the offload network adapter (730) may be reduced. In addition, offloading of these functions to the offload network adapter (730) permits bulk notification of established connections and state information to the host system (710) rather than piecemeal notifications as is present in known computing systems.

公开(公告)号：AU2003259192A1

公开(公告)日：2004-11-23

申请号：AU2003259192

申请日：2003-07-21

Applicant: IBM

Inventor： TRACEY JOHN ,  FREIMUTH DOUGLAS ,  MRAZ RONALD ,  NAHUM ERICH ,  PRADHAN PRASHANT ,  SAHU SAMBIT

IPC: H04B1/74 ,  H04L69/40 ,  G06F11/00

Abstract: The present invention provides a method, computer program product, and data processing system for efficiently recovering state and performing failover of a network offload engine. The present invention distinguishes between the hard state and the soft state of a protocol. Hard state is state information that, when lost, leads to incorrect protocol behavior. Soft state is state information that may be lost or become inconsistent without loss of correctness. The present invention ensures correctness by always being able to recover the hard state of the protocol. A preferred embodiment of the present invention performs a failover of a network offload engine by temporarily blocking the reception of network packets, recovering hard state from host information, resuming network operation using a substitute network offload engine, and recovering soft state from the subsequent network activity.

公开(公告)号：DE602005013099D1

公开(公告)日：2009-04-16

申请号：DE602005013099

申请日：2005-05-23

Applicant: IBM

Inventor： FREIMUTH DOUGLAS M ,  HU ELBERTB V ,  MRAZ RONALD ,  NAHUM ERICH M ,  PRADHAN PRASHANT ,  SAHU SAMBIT ,  TRACEY JOHN M

IPC: G06F13/30 ,  G06F13/28

Abstract: A number of improvements in network adapters that offload protocol processing from the host processor are provided. Specifically, mechanisms for handling memory management and optimization within a system utilizing an offload network adapter are provided. The memory management mechanism permits both buffered sending and receiving of data as well as zero-copy sending and receiving of data. In addition, the memory management mechanism permits grouping of DMA buffers that can be shared among specified connections based on any number of attributes. The memory management mechanism further permits partial send and receive buffer operation, delaying of DMA requests so that they may be communicated to the host system in bulk, and expedited transfer of data to the host system.

公开(公告)号：AT522865T

公开(公告)日：2011-09-15

申请号：AT03816813

申请日：2003-07-21

Applicant: IBM

Inventor： FREIMUTH DOUGLAS ,  MRAZ RONALD ,  NAHUM ERICH ,  PRADHAN PRASHANT ,  SAHU SAMBIT ,  TRACEY JOHN

IPC: G06F11/00 ,  H04B1/74 ,  H04L69/40

Abstract: The present invention provides a method, computer program product, and data processing system for efficiently recovering state and performing failover of a network offload engine. The present invention distinguishes between the hard state and the soft state of a protocol. Hard state is state information that, when lost, leads to incorrect protocol behavior. Soft state is state information that may be lost or become inconsistent without loss of correctness. The present invention ensures correctness by always being able to recover the hard state of the protocol. A preferred embodiment of the present invention performs a failover of a network offload engine by temporarily blocking the reception of network packets, recovering hard state from host information, resuming network operation using a substitute network offload engine, and recovering soft state from the subsequent network activity.

公开(公告)号：AT424583T

公开(公告)日：2009-03-15

申请号：AT05754067

申请日：2005-05-23

Applicant: IBM

Inventor： FREIMUTH DOUGLAS ,  HU ELBERTB ,  MRAZ RONALD ,  NAHUM ERICH ,  PRADHAN PRASHANT ,  SAHU SAMBIT ,  TRACEY JOHN M

IPC: G06F13/30 ,  G06F13/28

Abstract: A number of improvements in network adapters that offload protocol processing from the host processor are provided. Specifically, mechanisms for handling memory management and optimization within a system utilizing an offload network adapter are provided. The memory management mechanism permits both buffered sending and receiving of data as well as zero-copy sending and receiving of data. In addition, the memory management mechanism permits grouping of DMA buffers that can be shared among specified connections based on any number of attributes. The memory management mechanism further permits partial send and receive buffer operation, delaying of DMA requests so that they may be communicated to the host system in bulk, and expedited transfer of data to the host system.

公开(公告)号：DE602005003142D1

公开(公告)日：2007-12-13

申请号：DE602005003142

申请日：2005-06-23

Applicant: IBM

Inventor： FREIMUTH DOUGLAS M ,  HU ELBERT C ,  MRAZ RONALD ,  NAHUM ERICH M ,  PRADHAN PRASHANT ,  SAHU SAMBIT ,  TRACEY JOHN M

IPC: H04L29/06 ,  H04L12/56

Abstract: A number of improvements in network adapters that offload protocol processing from the host processor are provided. Specifically, a mechanism for improving connection establishment in a system utilizing an offload network adapter is provided. The connection establishment mechanism provides the ability to offload connection establishment and maintenance of connection state information to the offload network adapter. As a result of this offloading of connection establishment and state information maintenance, the number of communications needed between the host system and the offload network adapter may be reduced. In addition, offloading of these functions to the offload network adapter permits bulk notification of established connections and state information to the host system rather than piecemeal notifications as is present in known computing systems.

公开(公告)号：CA2573156A1

公开(公告)日：2006-05-04

申请号：CA2573156

申请日：2005-05-23

Applicant: IBM

Inventor： PRADHAN PRASHANT ,  NAHUM ERICH M ,  MRAZ RONALD ,  FREIMUTH DOUGLAS M ,  HU ELBERT V ,  SAHU SAMBIT ,  TRACEY JOHN M

IPC: G06F13/30 ,  G06F13/28

Abstract: A number of improvements in network adapters that offload protocol processin g from the host processor are provided. Specifically, mechanisms for handling memory management and optimization within a system utilizing an offload network adapter are provided (730). The memory management mechanism (730) permits both buffered sending (1770) and receiving (1680) of data as well as zero-copy sending and receiving of data. In addition, the memory management mechanism (730) permits grouping of DMA buffers (1130) that can be shared among specified connections based on any number of attributes. The memory management mechanism (730) further permits partial send and receive buffer operation, delaying of DMA requests so that they may be communicated to the host system (710) in bulk, and expedited transfer of data to the host system (710).

公开(公告)号：CA2573156C

公开(公告)日：2012-06-05

申请号：CA2573156

申请日：2005-05-23

Applicant: IBM

Inventor： FREIMUTH DOUGLAS M ,  HU ELBERT V ,  MRAZ RONALD ,  NAHUM ERICH M ,  PRADHAN PRASHANT ,  SAHU SAMBIT ,  TRACEY JOHN M

IPC: G06F13/30 ,  G06F13/28

Abstract: A number of improvements in network adapters that offload protocol processing from the host processor are provided. Specifically, mechanisms for handling memory management and optimization within a system utilizing an offload network adapter are provided (730). The memory management mechanism (730) permits both buffered sending (1770) and receiving (1680) of data as well as zero-copy sending and receiving of data. In addition, the memory management mechanism (730) permits grouping of DMA buffers (1130) that can be shared among specified connections based on any number of attributes. The memory management mechanism (730) further permits partial send and receive buffer operation, delaying of DMA requests so that they may be communicated to the host system (710) in bulk, and expedited transfer of data to the host system (710).