International Business Machines Corporation

Frank W Brice

Thomas Anthony Gregg

Damian Leo Osisek

Mark S Farrell

David F Craddock

Leslie W Wyman

Eugene P Hefferon

Bruce H Ratcliff

Steven G Glassen

Richard P Tarcza

Arthur James Stagg

Michael E Baskey

Stephen R Valley

Daniel Francis Casper

Robert Edward Galbraith

Kenneth J Oakes

Janet R Easton

Casper A Scalzi

Allan Samuel Meritt

Roger E Hough

Marten J Halma

Joseph C Elliott

Martin W Sachs

Kenneth J Fredericks

David E Stucki

Suzanne M John

John C Rathjen, Jr

Paul A Malinowski

Gustav Iii Sittmann

A computer program device and product is provided for timely processing of data. The computer program device comprises a program storage device readable by a digital processing apparatus and a program means including instructions executable by the digital processing apparatus by designating at least one set of queues in the queuing mechanism as input queues and another as output queues; issuing a signal adapter instruction to provide initiative to check content of any or all queues in the queuing mechanism; specifying initiate-output or initiate-input appropriately by means of said signal adapter instruction to cause associated adapter to asynchronously process said output or input queues; and causing synchronization by means of said signal adapter instruction by signaling the associated data queues to update all entries in order to render them current. The computer program product is for use with a computer system and has a main storage in processing communication with an interface element having adapters for storing a queuing mechanism storing data. It comprises of a data storage device including a computer usable medium having computer readable program means for ensuring proper and timely processing of data, for dedicating at least one set of queues of the queuing mechanism as input queues and another set as output queues and for generating a signal adapter instruction designated to provide initiative to check content of any or all queues in said queuing mechanism.

Computer program device and product for timely processing of data using a queued direct input-output device

A method and an apparatus for simulation of data in a computing system environment having a controlling program, a main memory, a plurality of hosts, at least one adapter and a queued-direct input/output device using a queued-direct input/output protocol. A pageable virtual machine is provided under control of a virtual-machine hypervisor in processing communication with one or more hosts. Simulation is then provided by strictly separating a set of protocol control blocks between those that contain main-memory addresses and those that do not. Copies of those control blocks that contain main-memory addresses is created and their addresses converted by the hypervisor from addresses used by the program in its virtual machine to real-memory addresses usable by the adapter.

Method and apparatus for simulation of data in a virtual environment using a queued direct input-output device

A queuing method and apparatus for receipt and transfer of incoming and outgoing data inn a network environment having a main storage. The mechanism includes at least one set of dedicated input queues and at least another set of dedicated output queues. In addition a plurality of queuing components is also provided that include attributes of devices to and from which data is to be transferred or received, and information about the queuing mechanism itself. The input and output queues also comprise an information block containing address of all input and output queues, a storage information block providing information about the queuing mechanism and storage list information blocks that defined for each queue containing specific information about that queue itself. In addition, the input and output queue sets include storage lists for identifying any input-output buffer(s) associated with each queue-set and a storage block address list for providing information about storage locations of any input-output buffer.

Self-contained queues with associated control information for receipt and transfer of incoming and outgoing data using a queued direct input-output device

A method and an apparatus for controlling movement of data between any host and any network including a set of devices in a computing system environment having a main memory with a queuing mechanism having a plurality of queues capable of being shared between a plurality of independent processes running on at least one host and at least one I/O adapter. A finite-state machine (FSM) is provided in the main memory and the FSM is divided into two disjoint sets of states, one of which represents state-values processed by the host and set by the adapter, and said other set represents state-values processed by the adapter and set by said host. Using each of these set of states free-running, non-deadlocking processes are provided within the host and the adapter so that the processes sequence circularly and continuously through a vector related to the FSMs. In addition, a circular data queue is provided in the vector as to further provide a set of storage blocks within said main memory for an input or an output buffer. Using these processes and the queues, data can be moved quickly without any need to initiate any distinct input/output requests or any interruptions by the host processor for completion of each data movement.

System for controlling movement of data in virtual environment using queued direct input/output device and utilizing finite state machine in main memory with two disjoint sets of states representing host and adapter states

A method and apparatus for error detection in a network computing system having a main storage capable of connecting to at least one application server and an interface element with at least one adapter capable of establishing processing communication with at least one application user(s). Data is transferred across the interface element to and from the main storage. The main storage includes a queuing mechanism providing a plurality of queuing components having attributes of devices to and from which data is to be transferred or received as well as information about the queuing mechanism itself. As part of the queuing component, providing a Storage-List-State Block (SLSB) having state indicators that provide state information about a plurality of buffers that make up each queue. A plurality of Error States is defined for by the SLSB Status Block. These Error States are set in the SLSB each time the interface element detects errors in the data stream. By monitoring the number of the errors for a specified time period, it can be determining as whether a session needs to be terminated or kept active.

Method and apparatus for error detection using a queued direct Input-Output device

This invention describes a method and system for virtualizing an internal capability of a computing system; specifically, the invention describes a method and system for establishing a virtual machine containing a programmed hardware-machine function that is normally executed natively as proprietary internal code in its own hardware environment, a Central Electronics Complex (CEC) or logical partition of a CEC. The code resides in a separate hardware domain of the CEC called the Service Element (SE). The IBM VM/ESA (VM) operating system requests the SE to transfer a copy of the code into a virtual machine that VM has initialized, where the machine function is provided (in the current embodiment) as an isolated and encapsulated part of a virtual Parallel Sysplex system comprising multiple virtual CECs in a testing environment.

Method and system for providing a hardware machine function in a protected virtual machine

Provides a method for increasing the connectivity of I/O resources to a multiplicity of operating systems (OSs) running in different resource partitions of a computer electronic complex (CEC) to obtain sharing of the I/O resources among the OSs of the CEC, including channels, subchannels (devices), and control units (CUs). The invention provides image identifiers (IIDs) for assigning resources to the different OSs. Each shared I/O resource has a sharing set of control blocks (CBs) in which a respective CB is assigned to (and located by) a respective IID of one of the OSs. Each of the CBs in a sharing set provides a different image of the same I/O resource. The different CB images are independently set to different states by I/O operations for the different OSs, so that the OSs can independently share the same I/O resource.

Method and means for sharing I/O resources by a plurality of operating

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Hurley, NY, United States of America

Frank W Brice