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    • 9. 发明申请
    • Pipelined processing of RDMA-type network transactions
    • 流水线处理RDMA型网络交易
    • US20070226750A1
    • 2007-09-27
    • US11356493
    • 2006-02-17
    • Robert SharpKenneth KeelsBrian HausauerEric Rose
    • Robert SharpKenneth KeelsBrian HausauerEric Rose
    • G06F15/16
    • H04L67/1097
    • A computer system such as a server pipelines RNIC interface (RI) management/control operations such as memory registration operations to hide from network applications the latency in performing RDMA work requests caused in part by delays in processing the memory registration operations and the time required to execute the registration operations themselves. A separate QP-like structure, called a control QP (CQP), interfaces with a control processor (CP) to form a control path pipeline, separate from the transaction pipeline, which is designated to handle all control path traffic associated with the processing of RI control operations. This includes memory registration operations (MR OPs), as well as the creation and destruction of traditional QPs for processing RDMA transactions. Once the MR OP has been queued in the control path pipeline of the adapter, a pending bit is set which is associated with the MR OP. Processing of an RDMA work request in the transaction pipeline that has engendered the enqueued MR OP is permitted to proceed as if the processing of the MR OP has already been completed. If the work request gets ahead of the MR OP, the associated pending bit being set will notify the adapter's work request transaction pipeline to stall (and possibly reschedule) completion of the work request until the processing of the MR OP for that memory region is complete. When the memory registration process for the memory region is complete, the associated pending bit is reset and the adapter transaction pipeline is permitted to continue processing the work request using the newly registered memory region.
    • 计算机系统,例如服务器管线RNIC接口(RI)管理/控制操作,诸如存储器注册操作,以从网络应用中隐藏执行RDMA工作请求的延迟部分地由于处理存储器注册操作的延迟和所需的时间 执行注册操作本身。 称为控制QP(CQP)的独立QP类结构与控制处理器(CP)接口,以形成与事务流水线分开的控制路径流水线,其被指定为处理与处理相关联的所有控制路径流量 RI控制操作。 这包括内存注册操作(MR OP),以及创建和销毁用于处理RDMA事务的传统QP。 一旦MR OP已经在适配器的控制路径管道中排队,则设置与MR OP相关联的挂起位。 如果已经完成了MR操作的处理,处理已经引入入站的MR OP的事务流水线中的RDMA工作请求被执行。 如果工作请求超过MR OP,则相关的待处理位将被设置将通知适配器的工作请求事务流水线停止(可能重新计划)工作请求的完成,直到该存储器区域的MR OP的处理完成 。 当存储器区域的存储器注册过程完成时,相关联的挂起位被复位,并且适配器事务流水线被允许使用新登记的存储器区域继续处理工作请求。