公开(公告)号：US20060015651A1

公开(公告)日：2006-01-19

申请号：US10890978

申请日：2004-07-14

申请人： Douglas Freimuth ,  Elbert Hu ,  Ronald Mraz ,  Erich Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Tracey

发明人： Douglas Freimuth ,  Elbert Hu ,  Ronald Mraz ,  Erich Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Tracey

IPC分类号： G06F15/16

CPC分类号： G06F13/30

摘要： 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.

摘要翻译： 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。 具体地说，提供了利用卸载网络适配器在系统内处理存储器管理和优化的机制。 存储器管理机制允许数据的缓冲发送和接收以及零拷贝发送和接收数据。 此外，存储器管理机制允许基于任何数量的属性对可以在指定连接之间共享的DMA缓冲器进行分组。 存储器管理机制进一步允许部分发送和接收缓冲器操作，延迟DMA请求，使得它们可以批量地传送到主机系统，并且将数据快速传送到主机系统。

公开(公告)号：US20060031524A1

公开(公告)日：2006-02-09

申请号：US10890710

申请日：2004-07-14

申请人： Douglas Freimuth ,  Elbert Hu ,  Ronald Mraz ,  Erich Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Tracey

发明人： Douglas Freimuth ,  Elbert Hu ,  Ronald Mraz ,  Erich Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Tracey

IPC分类号： G06F15/16 ,  G06F15/173

CPC分类号： H04L69/166 ,  H04L49/90 ,  H04L49/901 ,  H04L69/161 ,  H04L69/163

摘要： 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.

摘要翻译： 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的系统中的连接建立的机制。 连接建立机制提供将连接状态信息的连接建立和维护卸载到卸载网络适配器的能力。 由于连接建立和状态信息维护的这种卸载的结果，可以减少主机系统和卸载网络适配器之间所需的通信数量。 另外，将这些功能卸载到卸载网络适配器允许将已建立的连接和状态信息批量通知给主机系统，而不是按照已知的计算系统中存在的零碎的通知。

公开(公告)号：US20060015618A1

公开(公告)日：2006-01-19

申请号：US10891196

申请日：2004-07-14

申请人： Douglas Freimuth ,  Elbert Hu ,  Ronald Mraz ,  Erich Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Tracey

发明人： Douglas Freimuth ,  Elbert Hu ,  Ronald Mraz ,  Erich Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Tracey

IPC分类号： G06F15/173

CPC分类号： H04L49/9052 ,  G06F12/0862 ,  H04L47/621 ,  H04L49/90 ,  H04L49/9063

摘要： A number of improvements in network adapters that offload protocol processing from the host processor are provided. Specifically, an improved mechanism for handling receipt of data packets in a system utilizing an offload network adapter. The offload network adapter may include logic that permits the offload network adapter to delay notification of data reception to the host system in different ways. The advantage of delaying the notice of data packet reception to the host system is the potential for aggregation of several data packets, which can arrive immediately after the first one, for example, in a single notification. Given a stream with continuous data packet arrival, a value may be set, either statically or dynamically, for notification delay and this value may be configurable for the host system per communication socket.

公开(公告)号：US20050050187A1

公开(公告)日：2005-03-03

申请号：US10654069

申请日：2003-09-03

申请人： Douglas Freimuth ,  Ronald Mraz ,  Erich Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Tracey

发明人： Douglas Freimuth ,  Ronald Mraz ,  Erich Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Tracey

IPC分类号： H04L12/56 ,  G06F15/173

CPC分类号： H04L47/822 ,  H04L47/15 ,  H04L47/26 ,  H04L47/283 ,  H04L47/29 ,  H04L47/70 ,  H04L47/745

摘要： A mechanism for bottleneck avoidance is provided in an intelligent adapter. The mechanism allows the adapter to be used such that host/adapter system throughput is optimized. The bottleneck avoidance mechanism of the present invention determines when the adapter becomes a bottleneck. If certain conditions exist, then new connections are refused so that the adapter can process packets for existing connections. If certain other conditions exist, the adapter may migrate workload to the host processor for processing. These conditions may be determined by comparing memory usage or central processing unit usage to predetermined thresholds. Alternatively, the conditions may be determined by comparing adapter response time to host response time.

摘要翻译： 在智能适配器中提供了避免瓶颈的机制。 该机制允许使用适配器，使得主机/适配器系统吞吐量被优化。 本发明的瓶颈避免机制确定适配器何时成为瓶颈。 如果存在某些条件，则拒绝新的连接，以便适配器可以处理现有连接的数据包。 如果存在某些其他条件，则适配器可能会将工作负载迁移到主机处理器进行处理。 这些条件可以通过将存储器使用或中央处理单元使用与预定阈值进行比较来确定。 或者，可以通过将适配器响应时间与主机响应时间进行比较来确定条件。

公开(公告)号：US07114096B2

公开(公告)日：2006-09-26

申请号：US10406095

申请日：2003-04-02

申请人： Douglas Morgan Freimuth ,  Ronald Mraz ,  Erich Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Michael Tracey

发明人： Douglas Morgan Freimuth ,  Ronald Mraz ,  Erich Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Michael Tracey

IPC分类号： G06F11/00

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

摘要： 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.

摘要翻译： 本发明提供了一种用于有效地恢复网络卸载引擎的状态和执行故障切换的方法，计算机程序产品和数据处理系统。 本发明区分协议的硬状态和软状态。 硬态是状态信息，当丢失时会导致不正确的协议行为。 软状态是可能丢失或变得不一致而不失去正确性的状态信息。 本发明通过总是能够恢复协议的硬状态来确保正确性。 本发明的优选实施例通过暂时阻止网络分组的接收，从主机信息恢复硬状态，使用替代网络卸载引擎恢复网络操作，以及从后续网络活动中恢复软状态来执行网络卸载引擎的故障转移 。

公开(公告)号：US20090222564A1

公开(公告)日：2009-09-03

申请号：US12464741

申请日：2009-05-12

申请人： Douglas Morgan Freimuth ,  Elbert C. Hu ,  Ronald Mraz ,  Erich M. Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Michael Tracey

发明人： Douglas Morgan Freimuth ,  Elbert C. Hu ,  Ronald Mraz ,  Erich M. Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Michael Tracey

IPC分类号： G06F15/16

CPC分类号： H04L69/166 ,  H04L49/90 ,  H04L49/901 ,  H04L69/161 ,  H04L69/163

摘要： 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.

摘要翻译： 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的系统中的连接建立的机制。 连接建立机制提供将连接状态信息的连接建立和维护卸载到卸载网络适配器的能力。 由于连接建立和状态信息维护的这种卸载的结果，可以减少主机系统和卸载网络适配器之间所需的通信数量。 另外，将这些功能卸载到卸载网络适配器允许将已建立的连接和状态信息批量通知给主机系统，而不是按照已知的计算系统中存在的零碎的通知。

公开(公告)号：US07493427B2

公开(公告)日：2009-02-17

申请号：US10891196

申请日：2004-07-14

申请人： Douglas Morgan Freimuth ,  Elbert C. Hu ,  Ronald Mraz ,  Erich M. Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Michael Tracey

发明人： Douglas Morgan Freimuth ,  Elbert C. Hu ,  Ronald Mraz ,  Erich M. Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Michael Tracey

IPC分类号： G06F3/00 ,  G06F15/167 ,  G06F13/00

CPC分类号： H04L49/9052 ,  G06F12/0862 ,  H04L47/621 ,  H04L49/90 ,  H04L49/9063

摘要： A number of improvements in network adapters that offload protocol processing from the host processor are provided. Specifically, an improved mechanism for handling receipt of data packets in a system utilizing an offload network adapter. The offload network adapter may include logic that permits the offload network adapter to delay notification of data reception to the host system in different ways. The advantage of delaying the notice of data packet reception to the host system is the potential for aggregation of several data packets, which can arrive immediately after the first one, for example, in a single notification. Given a stream with continuous data packet arrival, a value may be set, either statically or dynamically, for notification delay and this value may be configurable for the host system per communication socket.

摘要翻译： 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。 具体地说，一种用于处理利用卸载网络适配器的系统中数据分组的接收的改进机制。 卸载网络适配器可以包括允许卸载网络适配器以不同的方式将对数据接收的通知延迟到主机系统的逻辑。 将数据分组接收通知延迟到主机系统的优点是几个数据分组的聚合的可能性，其可以在第一个数据分组之后立即到达，例如在单个通知中。 给定具有连续数据分组到达的流，可以静态或动态地设置用于通知延迟的值，并且该值可以针对每个通信套接字的主机系统来配置。

公开(公告)号：US08332531B2

公开(公告)日：2012-12-11

申请号：US13045374

申请日：2011-03-10

申请人： Douglas M. Freimuth ,  Elbert C. Hu ,  Ronald Mraz ,  Erich M. Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John M. Tracey

发明人： Douglas M. Freimuth ,  Elbert C. Hu ,  Ronald Mraz ,  Erich M. Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John M. Tracey

IPC分类号： G06F15/16

CPC分类号： G06F13/30

摘要： 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：US20110167134A1

公开(公告)日：2011-07-07

申请号：US13045392

申请日：2011-03-10

申请人： Douglas Morgan Freimuth ,  Elbert C. Hu ,  Ronald Mraz ,  Erich M. Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Michael Tracey

发明人： Douglas Morgan Freimuth ,  Elbert C. Hu ,  Ronald Mraz ,  Erich M. Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Michael Tracey

IPC分类号： G06F15/16

CPC分类号： G06F13/30

摘要： 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.

摘要翻译： 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。 具体地说，提供了利用卸载网络适配器在系统内处理存储器管理和优化的机制。 存储器管理机制允许数据的缓冲发送和接收以及零拷贝发送和接收数据。 此外，存储器管理机制允许基于任何数量的属性对可以在指定连接之间共享的DMA缓冲器进行分组。 存储器管理机制进一步允许部分发送和接收缓冲器操作，延迟DMA请求，使得它们可以批量地传送到主机系统，并且将数据快速传送到主机系统。

公开(公告)号：US20110161456A1

公开(公告)日：2011-06-30

申请号：US13045374

申请日：2011-03-10

申请人： Douglas Morgan Freimuth ,  Elbert C. Hu ,  Ronald Mraz ,  Erich M. Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Michael Tracey

发明人： Douglas Morgan Freimuth ,  Elbert C. Hu ,  Ronald Mraz ,  Erich M. Nahum ,  Prashant Pradhan ,  Sambit Sahu ,  John Michael Tracey

IPC分类号： G06F15/167

CPC分类号： G06F13/30

摘要： 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.