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    • 3. 发明授权
    • Apparatus, system and method for implementing a generalized queue pair in a system area network
    • 用于在系统区域网络中实现广义队列对的装置,系统和方法
    • US07493409B2
    • 2009-02-17
    • US10411425
    • 2003-04-10
    • David F. CraddockDonald William SchmidtBruce Marshall Walk
    • David F. CraddockDonald William SchmidtBruce Marshall Walk
    • G06F15/173G06F15/177G06F15/16
    • H04L49/901H04L49/90H04L67/1097H04L69/329
    • The present invention provides an apparatus, system and method for providing a generalized queue pair for use with host channel adapters of a system area network. With the apparatus, system and method, the hypervisor of a host channel adapter maintains a P_Key table for each logical port of the host channel adapter. When a request is received to allocate a queue pair from a requestor application associated with a logical port, a P_Key mode is set in a control register associated with the queue pair based on the type of requestor application that sent the request. Based on this P_Key mode, one or more P_Keys from a P_Key table associated with the logical port from which the request was received are written to one or more P_Key registers allocated to the queue pair. These P_Keys are then used to perform P_Key checks of incoming data packets. In addition, these P_Keys are inserted into headers of outgoing data packets. In a preferred embodiment, the P_Key modes may be a single P_Key check mode, a multiple P_Key check mode, and a P_Key check disabled mode.
    • 本发明提供了一种用于提供与系统区域网络的主机信道适配器一起使用的广义队列对的装置,系统和方法。 使用设备,系统和方法,主机通道适配器的管理程序维护主机通道适配器的每个逻辑端口的P_Key表。 当接收到从与逻辑端口相关联的请求者应用分配队列对的请求时,基于发送请求的请求者应用的类型,在与队列对关联的控制寄存器中设置P_Key模式。 基于该P_Key模式,来自与接收请求的逻辑端口相关联的P_Key表中的一个或多个P_Key被写入分配给队列对的一个或多个P_Key寄存器。 这些P_Keys然后用于执行P_Key检查输入数据包。 另外,这些P_Keys被插入输出数据包的头。 在优选实施例中,P_Key模式可以是单个P_Key检查模式,多个P_Key检查模式和P_Key检查禁用模式。
    • 4. 发明授权
    • Infiniband work and completion queue management via head and tail circular buffers with indirect work queue entries
    • Infiniband通过头尾循环缓冲区进行工作和完成队列管理,间接工作队列条目
    • US06789143B2
    • 2004-09-07
    • US09961922
    • 2001-09-24
    • David F. CraddockThomas Anthony GreggIan David JuddGregory Francis PfisterRenato John RecioDonald William Schmidt
    • David F. CraddockThomas Anthony GreggIan David JuddGregory Francis PfisterRenato John RecioDonald William Schmidt
    • G06F1300
    • G06F9/546
    • A distributed computing system having (host and I/O) end nodes, switches, routers, and links interconnecting these components is provided. The end nodes use send and receive queue pairs to transmit and receive messages. The end nodes use completion queues to inform the end user when a message has been completely sent or received and whether an error occurred during the message transmission or reception process. A mechanism implements these queue pairs and completion queues in hardware. A mechanism for controlling the transfer of work requests from the consumer to the CA hardware and work completions from the CA hardware to the consumer using head and tail pointers that reference circular buffers is also provided. The QPs and CQs do not contain Work Queue Entries and Completion Queue Entries respectively, but instead contain references to these entries. This allows them to be efficient and constant in size, while the Work Queue Entries and Completion Queue Entries themselves can vary in size, for example to include a variable number of data segments. Additionally, several mechanisms are provided to improve the overall efficiency of this process under different memory configurations.
    • 提供了具有(主机和I / O)端节点,交换机,路由器和互连这些组件的链路的分布式计算系统。 终端节点使用发送和接收队列对来发送和接收消息。 终端节点使用完成队列通知终端用户何时完全发送或接收了消息,以及在消息发送或接收过程中是否发生错误。 机制在硬件中实现这些队列对和完成队列。 还提供了一种机制,用于控制从消费者到CA硬件的工作请求的传送以及使用引用循环缓冲区的头和尾指针从CA硬件到消费者的完成。 QP和CQ不分别包含工作队列条目和完成队列条目,而是包含对这些条目的引用。 这允许它们在高度和大小上是恒定的,而工作队列条目和完成队列条目本身可以在大小上变化,例如包括可变数量的数据段。 另外,提供了几种机制以在不同的存储器配置下提高该过程的整体效率。
    • 7. 发明授权
    • APPARATUS AND METHOD FOR SWAPPING-OUT REAL MEMORY BY INHIBITING I/O OPERATIONS TO A MEMORY REGION AND SETTING A QUIESCENT INDICATOR, RESPONSIVE TO DETERMINING THE CURRENT NUMBER OF OUTSTANDING OPERATIONS
    • 用于通过将I / O操作抑制到存储器区域来设置实时存储器的设备和方法,并设置一个QUIESCENT指示符,以确定当前的显着操作数量
    • US06834332B2
    • 2004-12-21
    • US09942632
    • 2001-08-30
    • David F. CraddockThomas Anthony GreggRenato John RecioDonald William Schmidt
    • David F. CraddockThomas Anthony GreggRenato John RecioDonald William Schmidt
    • G06F1300
    • G06F12/12G06F12/1081
    • An apparatus and method for swapping out real memory by inhibiting input/output (I/O) operations to a memory region are provided. The apparatus and method provide a mechanism in which a quiesce indicator is provided in a field containing the current outstanding I/O count associated with the memory region whose real memory is to be swapped out. The current I/O field and the quiesce indicator are used as a means for communicating between a shared resource arbitrator and a guest consumer. When the quiesce indicator is set, the guest consumer is informed that it should not send any further I/O operations to that memory region. When the number of pending I/O operations against the memory region is zero, a valid bit in a protection table is set to invalid, and the real memory associated with the memory region may be swapped out. Thereafter, when the memory region is swapped back in, an address translation table is updated, the valid bit is reset, and the quiesce indicator is reset so that further I/O operations to the memory region may occur.
    • 提供了通过禁止对存储器区域的输入/输出(I / O)操作来交换实际存储器的装置和方法。 该装置和方法提供了一种机制,其中在包含与要实际存储器被换出的存储器区域相关联的当前未完成的I / O计数的字段中提供静默指示符。 当前的I / O域和静默指示符用作在共享资源仲裁器和客户消费者之间进行通信的手段。 当设置了静默指示符时,通知客户不要向该存储器区域发送任何进一步的I / O操作。 当对存储器区域的未决I / O操作的数量为零时,保护表中的有效位被设置为无效,并且与存储器区域相关联的实际存储器可以被换出。 此后,当存储器区域被交换回来时,地址转换表被更新,有效位被复位,并且静默指示器被复位,使得可能发生对存储器区域的进一步的I / O操作。