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    • 5. 发明公开
    • Apparatus for recovering lost buffers in a data processing system
    • Einrichtung zur Wiedergewinnung von Puffern in einem Datenverarbeitungssystem。
    • EP0551789A1
    • 1993-07-21
    • EP92480009.7
    • 1992-01-17
    • International Business Machines Corporation
    • Chevalier, DenisCalvignac, JeanMunier, Jean-MarieNaudin, BernardDuault, Maurice
    • G06F15/16G06F5/06
    • G06F15/167G06F5/06G06F2205/064
    • The apparatus is used for recovering buffers in a data processing system comprising a memory divided into a plurality of buffers provided with buffer control blocks, by means of which source and destination users exchange information. A buffer management circuit (26) is responsive to requests from users for allocating buffers to source users in order said source users store the information to be sent to the destination users and building buffer queues and for dequeueing buffers from said queues to send the information contained therein to the destination users and releasing the buffers afterwards. A time register (TMR-40) is settable to n different values in a predetermined order. The value of said time register is changed at the expiration of a time period P. Each time a buffer is allocated to one user the current value of the time register is written into a time mark field of the buffer control block, and a state field is set to a first value (leased). When the buffer is released the state field is set to a second value (released). The contents of the buffer control blocks are read at regular times t distant from P, and the state field of every buffer control block is tested to determine whether it is set to the second value and if not the time mark field is compared with the value the time mark register had at the time t-xP, where x is a number such as 1
    • 该装置用于在数据处理系统中恢复缓冲器,该数据处理系统包括分配有缓冲器控制块的多个缓冲器的存储器,借助于该缓冲器控制块,源和目的地用户交换信息。 缓冲器管理电路(26)响应于用户向源用户分配缓冲器的请求,以便所述源用户存储要发送到目的地用户的信息并构建缓冲器队列,并且用于从所述队列发出包含的信息的缓冲区 到目的地用户,然后释放缓冲区。 时间寄存器(TMR-40)可以按预定顺序设置为n个不同的值。 所述时间寄存器的值在时间周期P期满时改变。每当向一个用户分配缓冲器时,时间寄存器的当前值被写入缓冲器控制块的时间标记字段,并且状态字段 被设置为第一个值(租用)。 当释放缓冲区时,状态字段被设置为第二个值(释放)。 缓冲器控制块的内容在远离P的规则时间t读取,并且每个缓冲器控制块的状态字段被测试以确定是否被设置为第二值,并且如果不是将时间标记字段与值 时间标记寄存器在时间t-xP处,其中x是诸如1
    • 9. 发明公开
    • Mechanism for controlling the resources of a distributed information processing system
    • Vorrichtung zum Steuern von Betriebsmitteln eines verteilten Informationsverarbeitungssystems。
    • EP0505651A1
    • 1992-09-30
    • EP91480051.1
    • 1991-03-29
    • INTERNATIONAL BUSINESS MACHINES CORPORATION
    • Brezzo, BernardCalvignac, Jean-LouisMunier, Jean-MarieNaudin, Bernard, "les Provencales"Robbe, Jean-Claude
    • G06F13/40G06F13/38
    • G06F13/4004G06F13/385G06F13/4031
    • A data processing system includes data processing adapters (2) for controlling the data transfers between end systems (1) and a memory through contention type busses (7 and 11) and a control processor connected to the system bus (7) for through a coupler (8) for controlling the physical resources such as registers or memories of the whole data processing system. A control operation is initiated by the control processor which presents on its processor bus (14) a control operation to be executed in a destination unit which can be the coupler, a selected data processing adapter or a selected end system. Each unit is provided with a control operation interface dedicated to the processing of the control operation or its forwarding toward the destination unit and the preparation of a response to the control operation in the destination unit and the propagation of the response toward the coupler, so as to minimize the bus occupancy times.
    • 数据处理系统包括用于通过竞争型总线(7和11)控制终端系统(1)和存储器之间的数据传输的数据处理适配器(2)和连接到系统总线(7)的控制处理器,用于通过耦合器 (8),用于控制诸如整个数据处理系统的寄存器或存储器的物理资源。 由控制处理器启动控制操作,控制处理器在其处理器总线(14)上呈现要在可以是耦合器,所选数据处理适配器或选定端系统的目的地单元中执行的控制操作。 每个单元设置有专用于处理控制操作或其向目的地单元的转发的控制操作界面以及对目的地单元中的控制操作的响应的准备以及响应朝向耦合器的传播,从而 以最小化公交车的占用时间。