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公开(公告)号：US20070133582A1
公开(公告)日：2007-06-14
申请号：US11301106
申请日：2005-12-12
IPC分类号： H04L12/56
CPC分类号： H04L47/10 , H04L47/266 , H04L47/30 , H04L49/90 , H04L49/901
摘要： A method, system, and program provide for efficient send socket call handling by a transport layer. A transport layer of a network protocol stack receives a send socket call for data of a specified length from an application layer. Responsive to detecting that there is insufficient memory for a single memory allocation to a buffer in the transport layer for at least the specified length, the transport layer blocks the send socket call. The transport layer only wakes the send socket call upon detection of sufficient memory for the single memory allocation within the buffer of the transport layer for at least the specified length, wherein waking the send socket call triggers a kernel to perform the single memory allocation in the buffer and to write the data to the single memory allocation in a single pass.
摘要翻译： 方法，系统和程序提供传输层有效的发送套接字呼叫处理。 网络协议栈的传输层从应用层接收指定长度的数据的发送套接字调用。 响应于检测到对于至少指定长度的传输层中的缓冲器的单个存储器分配没有足够的存储器，传输层阻止发送套接字调用。 检测到传输层缓冲区内单个内存分配的足够内存至少达到指定长度时，传输层只会唤醒发送套接字调用，其中唤醒发送套接字调用会触发内核执行单个内存分配 缓冲区，并将数据写入单次存储器分配。
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公开(公告)号：US07571247B2
公开(公告)日：2009-08-04
申请号：US11301106
申请日：2005-12-12
IPC分类号： G06F15/16
CPC分类号： H04L47/10 , H04L47/266 , H04L47/30 , H04L49/90 , H04L49/901
摘要： A method, system, and program provide for efficient send socket call handling by a transport layer. A transport layer of a network protocol stack receives a send socket call for data of a specified length from an application layer. Responsive to detecting that there is insufficient memory for a single memory allocation to a buffer in the transport layer for at least the specified length, the transport layer blocks the send socket call. The transport layer only wakes the send socket call upon detection of sufficient memory for the single memory allocation within the buffer of the transport layer for at least the specified length, wherein waking the send socket call triggers a kernel to perform the single memory allocation in the buffer and to write the data to the single memory allocation in a single pass.
摘要翻译： 方法，系统和程序提供传输层有效的发送套接字呼叫处理。 网络协议栈的传输层从应用层接收指定长度的数据的发送套接字调用。 响应于检测到对于至少指定长度的传输层中的缓冲器的单个存储器分配没有足够的存储器，传输层阻止发送套接字调用。 检测到传输层缓冲区内单个内存分配的足够内存至少达到指定长度时，传输层只会唤醒发送套接字调用，其中唤醒发送套接字调用会触发内核执行单个内存分配 缓冲区，并将数据写入单次存储器分配。
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公开(公告)号：US20050086390A1
公开(公告)日：2005-04-21
申请号：US10687235
申请日：2003-10-16
CPC分类号： H04L69/16 , H04L69/161 , H04L69/22
摘要： A method, system, and program for efficient packet desegmentation on a network adapter are provided. Multiple data packet segments received at a network adapter from a single connection are buffered at the network adapter. The single connection is identified by addresses and ports extracted from the header of each data packet segment. Responsive to detecting a buffering release condition, the data packet segments are released from the network adapter as a desegmented group to a network stack, such that the data packets segments received for the single connection are efficiently passed to the network stack together. In particular, the single connection is a TCP connection identified by a four-tuple of source and destination addresses and ports extracted from each TCP header of each of said plurality of data packet segments.
摘要翻译： 提供了一种用于在网络适配器上实现有效的分组分段的方法，系统和程序。 在网络适配器处从单个连接接收的多个数据分组段被缓冲。 单个连接由从每个数据分组段的报头提取的地址和端口来标识。 响应于检测缓冲释放条件，将数据分组片段作为被分组的组从网络适配器释放到网络堆栈，使得为单个连接接收的数据分组片段被有效地传递到网络堆栈。 特别地，单个连接是由从所述多个数据分组段中的每一个的每个TCP报头提取的源和目的地地址和端口的四元组标识的TCP连接。
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公开(公告)号：US20050086359A1
公开(公告)日：2005-04-21
申请号：US10687236
申请日：2003-10-16
CPC分类号： G06F9/5027 , G06F9/544 , G06F2209/5018 , G06F2209/508
摘要： A method, system, and program for monitoring thread usage to dynamically control a thread pool are provided. An application running on the server system invokes a listener thread on a listener socket for receiving client requests at the server system and passing the client requests to one of multiple threads waiting in a thread pool. Additionally, the application sends an ioctl call in blocking mode on the listener thread. A TCP layer within the server system detects the listener thread in blocking mode and monitors a thread count of at least one of a number of incoming requests waiting to be processed and a number of said plurality of threads remaining idle in the thread pool over a sample period. Once the TCP layer detects a thread usage event, the ioctl call is returned indicating the thread usage event with the thread count, such that a number of threads in the thread pool may be dynamically adjusted to handle the thread count.
摘要翻译： 提供了一种用于监视线程使用以动态控制线程池的方法，系统和程序。 在服务器系统上运行的应用程序调用侦听器套接字上的侦听器线程，以便在服务器系统上接收客户端请求，并将客户端请求传递给等待线程池的多个线程之一。 此外，应用程序在侦听器线程上以阻塞模式发送ioctl调用。 服务器系统内的TCP层以阻塞模式检测侦听器线程，并且监视等待被处理的多个传入请求中的至少一个的线程计数，并且线程池中的多个线程在一个样本上保持空闲 期。 一旦TCP层检测到线程使用事件，将返回指示线程计数的线程使用事件的ioctl调用，以使线程池中的线程数可以被动态调整以处理线程计数。
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5.发明申请Method, system and article for rapid detection and avoidance of high data corrupting routes within a network 有权用于快速检测和避免网络内高数据损坏路由的方法，系统和文章公开(公告)号：US20050036452A1
公开(公告)日：2005-02-17
申请号：US10640819
申请日：2003-08-14
CPC分类号： H04L1/0061 , H04L1/0072 , H04L1/08 , H04L1/16 , H04L1/1809 , H04L45/00 , H04L45/22 , H04L45/28 , H04L69/16 , H04L69/161 , H04L69/163 , H04L69/22 , H04L69/40
摘要： A receiving host in a TCP/IP network sends an acknowledgment indicating a received data packet is corrupt. The sending host will begin transmitting with a new field set in the IP header called a check-TCP-checksum bit, thereby requesting that all routers in the TCP/IP network perform a checksum on the entire received packet. Routers in the TCP/IP network will perform a complete checksum on an entire packet with the check-TCP-checksum bit set, and not just on the IP header. The routers continuously monitor the ratio of corrupt packets received on a particular port that fail the entire packet checksum to the total number of packets received on that port. If the ratio of corrupt-to-received packets exceeds a corruption threshold, the router assumes that the associated link is causing data corruption and issues a routing update indicating that the link is bad and should be avoided. Once the retransmission rate between the sender and receiver drops below a threshold level, the bad link has been detected and avoided within the TCP/IP network and the check-TCP-checksum option in the IP header is no longer set in data packets transmitted to the receiver host.
摘要翻译： TCP / IP网络中的接收主机发送指示接收到的数据包已损坏的确认。 发送主机将开始使用称为检查TCP校验和位的IP报头中设置的新字段进行发送，从而请求TCP / IP网络中的所有路由器对整个接收到的数据包执行校验和。 TCP / IP网络中的路由器将对整个数据包执行完整的校验和，同时检查TCP-checksum位，而不仅仅是在IP报头上。 路由器连续监视在特定端口上接收的损坏数据包的总数与在该端口上接收的数据包的总数之间的比例。 如果损坏的数据包的比例超过了破坏阈值，则路由器假设相关联的链路导致数据损坏，并发出路由更新，指示链路不良，应该避免。 一旦发送方和接收方之间的重传速率下降到阈值以下，就会在TCP / IP网络内检测并避免不良链路，并且IP报头中的check-TCP-checksum选项不再被设置在发送到 接收主机。
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6.发明授权Method, system and article for improved TCP performance during packet reordering 失效方法，系统和文章，用于在数据包重排序期间改进TCP性能公开(公告)号：US07742419B2
公开(公告)日：2010-06-22
申请号：US12101765
申请日：2008-04-11
IPC分类号： H04L1/00
CPC分类号： H04L29/06 , H04L69/16 , H04L69/161 , H04L69/163
摘要： TCP congestion avoidance is implemented upon retransmission of a packet and is reverted back to the original congestion state upon receipt of an early acknowledgement (ACK), indicating reordering of packets, thereby eliminating a needless restriction on TCP bandwidth. Upon receiving an ACK to a retransmitted packet, it is determined if the ACK resulted from receipt of the original reordered packet or the retransmitted packet, based on the arrival time of the ACK at the sender. If the round-trip-time (RTT) for the retransmitted packet is much lower than the average or current calculated RTT for the network link between sender and receiver, then the retransmission occurred as a result of a reordering event, and the congestion window is restored back to its value prior to the retransmission, thereby permitting the network link to continue operating at its original increased throughput.
摘要翻译： TCP拥塞避免在分组重传时实现，并且在接收到指示重新排序分组的早期确认（ACK）时被恢复到原始拥塞状态，从而消除对TCP带宽的不必要的限制。 在向重传的分组接收到ACK时，基于ACK在发送方的到达时间确定ACK是否从接收到原始重新排序的分组或重传分组而产生。 如果重发分组的往返时间（RTT）远低于发送方和接收方之间的网络链路的平均或当前计算的RTT，则重新发送作为重排序事件的结果，拥塞窗口为 在重传之前恢复其值，从而允许网络链路以其原始增加的吞吐量继续运行。
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7.发明授权Method, system, and computer program product for delivering data to a storage buffer assigned to an application 失效用于将数据传送到分配给应用程序的存储缓冲区的方法，系统和计算机程序产品公开(公告)号：US07519699B2
公开(公告)日：2009-04-14
申请号：US10912498
申请日：2004-08-05
IPC分类号： G06F15/173
CPC分类号： H04L67/2842 , H04L49/90 , H04L49/9036 , H04L69/16 , H04L69/161 , H04L69/32
摘要： A method, system, and computer program product in a computer-readable medium for delivering data, received from a network, to a storage buffer assigned to an application is proposed. An application designates a communication buffer within a local data processing system for buffering data communicated with an application. The local data processing system reports to a network interface of the local data processing system a memory address of the designated communication buffer, and the data processing system creates a cookie containing the memory address. The data processing system then sends the cookie form the local data processing system to a remote data processing system, such that the remote data processing system may address data directly to the designated communication buffer.
摘要翻译： 提出了一种用于将从网络接收的数据传送到分配给应用的存储缓冲器的计算机可读介质中的方法，系统和计算机程序产品。 应用程序指定本地数据处理系统内的通信缓冲器，用于缓冲与应用程序通信的数据。 本地数据处理系统向本地数据处理系统的网络接口报告指定通信缓冲器的存储器地址，并且数据处理系统创建包含存储器地址的cookie。 然后，数据处理系统将本地数据处理系统的cookie发送到远程数据处理系统，使得远程数据处理系统可以直接将数据寻址到指定的通信缓冲器。
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8.发明授权Method, system and article for rapid detection and avoidance of high data corrupting routes within a network 有权用于快速检测和避免网络内高数据损坏路由的方法，系统和文章公开(公告)号：US07394769B2
公开(公告)日：2008-07-01
申请号：US10640819
申请日：2003-08-14
IPC分类号： H04J1/16
CPC分类号： H04L1/0061 , H04L1/0072 , H04L1/08 , H04L1/16 , H04L1/1809 , H04L45/00 , H04L45/22 , H04L45/28 , H04L69/16 , H04L69/161 , H04L69/163 , H04L69/22 , H04L69/40
摘要： A receiving host in a TCP/IP network sends an acknowledgment indicating a received data packet is corrupt. The sending host will begin transmitting with a new field set in the IP header called a check-TCP-checksum bit, thereby requesting that all routers in the TCP/IP network perform a checksum on the entire received packet. Routers in the TCP/IP network will perform a complete checksum on an entire packet with the check-TCP-checksum bit set, and not just on the IP header. The routers continuously monitor the ratio of corrupt packets received on a particular port that fail the entire packet checksum to the total number of packets received on that port. If the ratio of corrupt-to-received packets exceeds a corruption threshold, the router assumes that the associated link is causing data corruption and issues a routing update indicating that the link is bad and should be avoided. Once the retransmission rate between the sender and receiver drops below a threshold level, the bad link has been detected and avoided within the TCP/IP network and the check-TCP-checksum option in the IP header is no longer set in data packets transmitted to the receiver host.
摘要翻译： TCP / IP网络中的接收主机发送指示接收到的数据包已损坏的确认。 发送主机将开始使用称为检查TCP校验和位的IP报头中设置的新字段进行发送，从而请求TCP / IP网络中的所有路由器对整个接收到的数据包执行校验和。 TCP / IP网络中的路由器将对整个数据包执行完整的校验和，同时检查TCP-checksum位，而不仅仅是在IP报头上。 路由器连续监视在特定端口上接收的损坏数据包的总数与在该端口上接收的数据包的总数之间的比例。 如果损坏的数据包的比例超过了破坏阈值，则路由器假设相关联的链路导致数据损坏，并发出路由更新，指示链路不良，应该避免。 一旦发送方和接收方之间的重传速率下降到阈值以下，就会在TCP / IP网络内检测并避免不良链路，并且IP报头中的check-TCP-checksum选项不再被设置在发送到 接收主机。
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9.发明授权Method, system and article for dynamic real-time stream aggregation in a network 失效网络中动态实时流聚合的方法，系统和文章公开(公告)号：US07386624B2
公开(公告)日：2008-06-10
申请号：US10692124
申请日：2003-10-23
申请人： Venkat Venkatsubra , Vinit Jain
发明人： Venkat Venkatsubra , Vinit Jain
IPC分类号： G06F15/16
CPC分类号： H04L65/4092 , H04L29/06027 , H04L65/608
摘要： A graphic user interface of a network client (106) includes a stock ticker from a stock server (110) and a news sidebar from a news server (112) over the IP addresses advertised to the client (106) in its list of mutli-homed addresses from the video server (104) specified under Stream Control Transmission Protocol (SCTP). The client accepts real-time data from the stock exchange server and the news agency server on the multi-homed IP addresses designated in the association with the video server (104) without knowing that the data is coming from a different source than the video server (104). The real-time data feeds from the video, stock and news servers are aggregated on the client (106) with enhanced speed because the feeds come directly to the client and not via the video server. The operating systems of the home server and remote servers utilize SCTP and specialized commands to implement the enhanced speed of real-time data aggregation being streamed to network clients without requiring modifications to existing client systems.
摘要翻译： 网络客户端（106）的图形用户界面包括来自库存服务器（110）的股票行情和来自新闻服务器（112）的新闻侧栏，通过在其列表中通告给客户端（106）的IP地址， 来自在流控制传输协议（SCTP）下指定的视频服务器（104）的归属地址。 客户端接收来自证券交易所服务器和通讯社服务器的与视频服务器（104）相关联指定的多归属IP地址的实时数据，而不知道数据来自与视频服务器不同的源 （104）。 来自视频，股票和新闻服务器的实时数据馈送以高速度聚合在客户端（106）上，因为馈送直接进入客户端而不是经由视频服务器。 家庭服务器和远程服务器的操作系统使用SCTP和专用命令来实现流式传输到网络客户端的实时数据聚合的增强速度，而不需要修改现有的客户端系统。
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公开(公告)号：US20050286455A1
公开(公告)日：2005-12-29
申请号：US10875897
申请日：2004-06-24
摘要： The present invention provides a method and apparatus for multicast tunneling for mobile devices. The method comprises receiving a multicast packet directed to a plurality of mobile nodes, the mobile nodes being associated with a home subnet and identifying if any of the plurality of the mobile nodes are coupled to a subnet other than the home subnet, wherein each of the identified mobile nodes has an associated transmission path through which that mobile node can be reached. The method further provides that in response to determining that at least some of the mobile nodes are coupled to the subnet other than the home subnet, determining which of the identified mobile nodes has a common next hop in their associated transmission path and generating a packet including at least a portion of the multicast packet and including in the packet a list of mobile nodes that have the common next hop. The method further provides for transmitting the generated packet to the common next hop.
摘要翻译： 本发明提供一种用于移动设备的组播隧道的方法和装置。 所述方法包括：接收指向多个移动节点的多播分组，所述移动节点与归属子网相关联，并且识别所述多个所述移动节点中的任一个是否耦合到除所述归属子网之外的子网，其中， 识别的移动节点具有相关联的传输路径，通过该路径可以到达该移动节点。 该方法进一步规定，响应于确定至少一些移动节点被耦合到除了归属子网之外的子网，确定所识别的移动节点中哪一个在其相关联的传输路径中具有共同的下一跳，并且生成包括 所述多播分组的至少一部分并且在分组中包括具有公共下一跳的移动节点的列表。 该方法进一步提供将生成的分组发送到公共下一跳。
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