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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
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.
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2.发明专利
公开(公告)号：JP2007074711A
公开(公告)日：2007-03-22
申请号：JP2006220725
申请日：2006-08-11
Applicant: Internatl Business Mach Corp
, インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation Inventor： PRADHAN PRASHANT , SAHA DEBANJAN , SAHU SAMBIT , SINGH MANPREET , HALEY MICHAEL R
IPC: H04L12/56
CPC classification number: H04L43/0882 , H04L41/12 , H04L43/0829 , H04L43/0852
Abstract: PROBLEM TO BE SOLVED: To provide a method and system for generating an annotated network topology. SOLUTION: A method of generating an annotated network topology of a network is disclosed. The method includes determining available band width "B" of a network, on a network path connecting a pair of endpoints by performing Transfer Control Protocol (TCP) flows between the pair of endpoints, with the network having a plurality of network paths; identifying a bottleneck link in the network path; and annotating all edges in a network path, wherein available bandwidth annotation of the links inside the network is determined using end-to-end network measurements. A system for generating the annotated network topology of a network is also disclosed. COPYRIGHT: (C)2007,JPO&INPIT
Abstract translation: 要解决的问题：提供一种用于生成注释网络拓扑的方法和系统。 公开了一种生成网络的注释网络拓扑的方法。 该方法包括通过在该对端点之间执行传输控制协议（TCP）流与网络具有多个网络路径，在连接一对端点的网络路径上确定网络的可用带宽“B”; 识别网络路径中的瓶颈链路; 并注释网络路径中的所有边缘，其中使用端到端网络测量来确定网络内的链路的可用带宽注释。 还公开了一种用于生成网络的注释网络拓扑的系统。 版权所有（C）2007，JPO＆INPIT
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3.发明申请APPARATUS AND METHOD FOR SUPPORTING CONNECTION ESTABLISHMENT IN AN OFFLOAD OF NETWORK PROTOCOL PROCESSING 审中-公开网络协议处理卸载中支持连接建立的装置和方法
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
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。
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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
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.
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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
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.
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Patent Agency Ranking
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
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.
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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
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.
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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
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.
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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
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.
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10.发明专利
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
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).
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