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    • 1. 发明授权
    • Method of increasing the bandwidth of a packet bus by reordering reply
packets
    • 通过重新排序应答包来增加分组总线带宽的方法
    • US5006982A
    • 1991-04-09
    • US261047
    • 1988-10-21
    • Ronald J. EbersoleDavid JohnsonDavid BuddeMark S. MyersGerhard Bier
    • Ronald J. EbersoleDavid JohnsonDavid BuddeMark S. MyersGerhard Bier
    • G06F13/42G06F13/36
    • G06F13/4217
    • A data processor bus in which information is transferred between agents attached to the bus by issuing request packets that request data from an agent on the bus and reply packets that return data requested by a request packet. A control method mixes request-and-reply packets on the bus by determining the use of a next-bus cycle using arbitration, reply deferral, and specification lines and the state of a grant queue and a pipe queue in accordance with a specified protocol. A request is forced to take the next available bus cycle upon the condition that there is an agent identified in the great queue and the pipeline queue is not full. A reply packet is forced to take the next available bus cycle upon the condition that the pipeline queue is full. A reply packet is forced to take the next available bus cycle upon the condition that the grant queue is empty and the pipeline queue is not empty. Giving requests precedence over replies to allows the pipeline to be kept as full as possible. A replying agent assigned to the highest priority slot 1 in the pipeline queue is allowed to defer its own slot in the pipeline queue until a later time to thereby permit a transaction in Slot 2 of the pipeline queue to be completed before the one ahead of it.
    • 一种数据处理器总线,其中通过发出从总线上的代理请求数据的请求分组和返回由请求分组请求的数据的应答分组来传递附加到总线的代理之间的信息。 控制方法通过使用仲裁,回复延迟和规范行以及根据指定协议的授权队列和管道队列的状态来确定使用下一个总线周期来在总线上混合请求和应答分组。 一个请求被强制执行下一个可用的总线周期,条件是在大队列中识别出代理,并且流水线队列未满。 在流水线队列已满的情况下,应答包被强制执行下一个可用的总线周期。 在许可队列为空并且流水线队列不为空的情况下,应答分组被迫采取下一个可用的总线周期。 给予请求优先于回复,以允许管道尽可能保持完整。 分配给流水线队列中的最高优先级时隙1的应答代理被允许推迟其在流水线队列中的其自己的时隙,直到稍后时间,从而允许流水线队列的时隙2中的事务在它之前的一个之前完成 。