公开(公告)号：US07908403B2

公开(公告)日：2011-03-15

申请号：US12030961

申请日：2008-02-14

申请人： Mark P Bendyk ,  Daniel F Casper ,  John R. Flanagan ,  Clint A. Hardy ,  Roger G. Hathorn ,  Catherine C. Huang ,  Matthew L. Kalos ,  Louis W. Ricci ,  Gustav E. Sittmann ,  Harry M. Yudenfriend

发明人： Mark P Bendyk ,  Daniel F Casper ,  John R. Flanagan ,  Clint A. Hardy ,  Roger G. Hathorn ,  Catherine C. Huang ,  Matthew L. Kalos ,  Louis W. Ricci ,  Gustav E. Sittmann ,  Harry M. Yudenfriend

IPC分类号： G06F3/00

CPC分类号： G06F13/122 ,  G06F9/50

摘要： A computer program product, an apparatus, and a method for reducing reserved device access contention at a control unit in communication with a plurality of operating systems via one or more channels are provided. The computer program product includes a tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method that includes receiving a command message at the control unit from a first operating system, including an I/O operation command for a device. A device busy indicator is received, indicating that a second operating system has reserved the device. The command message is queued on a device busy queue in response to the device busy indicator. The control unit monitors for a device end indicator. The device busy queue is serviced to perform the I/O operation command in response to the device end indicator.

摘要翻译： 提供了一种用于在经由一个或多个通道与多个操作系统通信的控制单元处减少预留设备访问争用的计算机程序产品，装置和方法。 计算机程序产品包括可由处理电路读取的有形存储介质，并且存储用于由处理电路执行以执行包括从第一操作系统在控制单元处接收命令消息的方法的指令，该第一操作系统包括I / O操作命令 用于设备。 接收到设备忙指示符，指示第二操作系统已经预留了设备。 响应于设备忙指示灯，命令消息在设备忙碌队列中排队。 控制单元监视设备端指示器。 服务设备忙碌队列以响应设备结束指示符执行​​I / O操作命令。

公开(公告)号：US20090037618A1

公开(公告)日：2009-02-05

申请号：US12167298

申请日：2008-07-03

申请人： Daniel F Casper ,  John R. Flanagan ,  Paul S. Frazer ,  Kenneth J. Oakes ,  John S. Trotter

发明人： Daniel F Casper ,  John R. Flanagan ,  Paul S. Frazer ,  Kenneth J. Oakes ,  John S. Trotter

IPC分类号： G06F13/00

CPC分类号： G06F13/12

摘要： A bi-directional and full duplex facility for permitting both the IO processor and the Channel to write CCA messages on their respective queues at the same time. IOP messages to the channel are stored on the TO_CHN queue and Channel messages to the IOP on the TO_IOP queue. CCA Queues replace hardware CCAs due to increasing transmission capabilities of current IO processors and Channel processors. Even though the mechanism is similar, the present invention provides some benefits in the use of signaling. The IOP does not have to signal the Channel each time it puts something on its outbound queue. Each queue contains multiple slots. This allows the IOP and Channel to write multiple messages on the targeted queue without encountering a CCA busy signal. The actual queues are now structured in hardware system memory.

摘要翻译： 双向和全双工设备，用于允许IO处理器和通道同时在其各自的队列上写入CCA消息。 到该通道的IOP消息存储在TO_CHN队列上，并将通道消息存储到TO_IOP队列上的IOP。 由于当前IO处理器和通道处理器的传输能力不断增加，CCA队列取代硬件CCA。 即使该机制相似，本发明在使用信令方面提供了一些益处。 每当它在其出站队列上放置某些东西时，IOP都不必向Channel发出信号。 每个队列包含多个插槽。 这允许IOP和Channel在目标队列上写入多个消息，而不会遇到CCA忙信号。 实际的队列现在由硬件系统内存构成。