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1. 发明授权

US5016167A Resource contention deadlock detection and prevention 失效
标题翻译：资源争用死锁检测和预防
公开(公告)号：US5016167A
公开(公告)日：1991-05-14
申请号：US135845
申请日：1987-12-21
申请人： Kham X. Nguyen , Theodore S. Robinson , Michael D. Taylor , Kevin L. Daberkow
发明人： Kham X. Nguyen , Theodore S. Robinson , Michael D. Taylor , Kevin L. Daberkow
IPC分类号： G06F9/46 , G06F13/376 , G06F15/17 , G06F15/173
CPC分类号： G06F9/524 , G06F13/376 , G06F15/17 , G06F15/173
摘要： In a multiprocessor system with an interleaved memory, predicted busy terms for interleaves of the main store being accessed are sent to each processor in the system, so that they will not waste pipe flows making requests to the busy interleaves. The predicted busy term is lowered before access to the interleaves is complete, to allow for the latency between the time the processor sets up the request and the time the main store system receives it. Contention occurs when several processors request access to the same interleave of main store. To detect deadlocks, a counter for each processor keeps track of the number of consecutive requests from that processor which have been rejected. Once the number reaches a threshold for a first processor, its counter initiates a state machine which inhibits other processors from making requests to the main store until the first processor is successful in gaining access.
摘要翻译：在具有交错存储器的多处理器系统中，被访问的主存储器的交织的预测繁忙项被发送到系统中的每个处理器，使得它们不会浪费向繁忙交错提出请求的管道流。在访问交错完成之前，预测的繁忙字词被降低，以允许处理器设置请求的时间与主存储系统接收时间之间的延迟。当几个处理器请求访问主存储的相同交错时，会发生争用。为了检测死锁，每个处理器的计数器跟踪已被拒绝的处理器的连续请求数。一旦数量达到第一处理器的阈值，其计数器启动一个状态机，禁止其他处理器向主存储器发出请求，直到第一个处理器成功访问。

2. 发明授权

US5488706A Retry request system in a pipeline data processing system where each requesting unit preserves the order of requests 失效
标题翻译：在流水线数据处理系统中重试请求系统，其中每个请求单元保留请求的顺序
公开(公告)号：US5488706A
公开(公告)日：1996-01-30
申请号：US993082
申请日：1992-12-18
申请人： Kent Wendorf , Ronald N. Hilton , Nicholas Y. Pang , Jeffrey L. Baker , Kham X. Nguyen
发明人： Kent Wendorf , Ronald N. Hilton , Nicholas Y. Pang , Jeffrey L. Baker , Kham X. Nguyen
IPC分类号： G06F9/312 , G06F9/38 , G06F9/30 , G06F9/28
CPC分类号： G06F9/30043 , G06F9/3863
摘要： An interface between a storage unit and a system control unit maintains a sequential processing when retrying linestores by providing a single piece of information that the linestore is a "first" in a series. An initial request flag accompanies linestore requests to the system controller and is returned to the storage unit with linestore replies. A mode indicator coupled with the storage unit pipeline sets a retry mode latch in response to a linestore restart reply, and resets the retry mode latch in response to a linestore read reply by the system controller to an initial request. Logic in the pipeline suppresses requests for the system resource in the pipeline, other than initial requests, when the retry mode latch is set, such as by flagging data subject of the second flow as locked or otherwise invalid. The port includes a state machine which preserves the order of pending requests for the system resource.
摘要翻译：存储单元和系统控制单元之间的接口通过提供一系列信息来重新生成线路，从而维持一个连续的处理。初始请求标志伴随着系统控制器的线路请求，并且返回到具有线路存储应答的存储单元。与存储单元管道耦合的模式指示符响应于线路重启应答而设置重试模式锁存器，并且响应于系统控制器的线路读取应答而将重试模式锁存器重置为初始请求。流水线中的逻辑在重设模式锁存器被设置时，例如通过将第二个流的数据主体标记为锁定或以其他方式无效，就抑制了流水线中的系统资源的请求，而不是初始请求。该端口包括状态机，其保留系统资源的未决请求的顺序。

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