Abstract: A method of regulating power for multi-node computer system components has a closed-ring path that links all the power governors and circulating in the ring is a system power number that represents the power consumption of the entire system. Meanwhile, all the governors keep counting its local power consumption. Each time the number passes a governor, the governor will add its local count onto this number, store this number for future usage, and reset its local count. When the new number returns back to the same power governor, the governor will subtract the new number with its stored number to calculate the overall system power usage within a number circulation period. The system power number overflow problem is also detected with a counter if the incoming number is smaller then the number previously stored. The counter whose counting capacity is greater than the maximum system power usage on all the nodes within a number circulation period.

Abstract: A rotate then operate instruction having a T bit is fetched and executed wherein a first operand in a first register is rotated by an amount and a Boolean operation is performed on a selected portion of the rotated first operand and a second operand in of a second register. If the T bit is ‘0’ the selected portion of the result of the Boolean operation is inserted into corresponding bits of a second operand of a second register. If the T bit is ‘1’, in addition to the inserted bits, the bits other than the selected portion of the rotated first operand are saved in the second register.

Abstract: An instruction is provided to perform clearing of selected address translation buffer entries (TLB entries) associated with a particular address space, such as segments of storage or regions of storage. The buffer entries related to segment table entries or region table entries or ASCE addresses. The instruction can be implemented by software emulation, hardware, firmware or some combination thereof.

Abstract: A system, and program product having at least one subscriber subscribing to topics from one or more data sources. The data sources available and the number of subscriptions for each data source are registered in a table in real time. Upon detecting either subscription activity by the subscribers or availability of data on a data source, a matching routine compares the subscriptions registered for the available data source and enables the sending of messages from the available data source to subscriber/s.

Abstract: A client application program subscribing to a channel of a pub/sub service, receives a message published by the pub/sub service, the received message invoking an associated application program at the client.

Abstract: An Extended Input/output (I/O) measurement word facility is provided. Provision is made for emulation of the Extended I/O measurement word facility. The facility provides for storing measurement data associated with a single I/O operation in an extended measurement word associated with an I/O response block. In a further aspect, the stored data may have a resolution of approximately one-half microsecond.

Abstract: A facility and cache machine instruction of a computer architecture for specifying a target cache cache-level and a target cache attribute of interest for obtaining a cache attribute of one or more target caches. The requested cache attribute of the target cache(s) is saved in a register.

Abstract: A computer comprising a processor, a volatile main store, a non-volatile random access memory (NVRAM) mirror store, and optionally a cache for the non-volatile mirror store. While programs of the computer are operational, the contents of the volatile main store are mirrored in the non-volatile mirror store such that when a startup signal is received, the contents of the volatile main store are quickly restored from the contents of the non-volatile mirror store.

Abstract: The present invention provides a method and system for automated handling of resolvable and non-resolvable errors in the execution of system management flows by enhancing Workflow Engines (30) by an Error Handling component (40) and by adding a supportive Error Handling Layer (60, 90, 100) to invoked system management tasks which serves as the counterpart to the Workflow Engine's Error Handling component (see FIG. 2). The additional functionality of the task-provided Error Handling Layer (90, 70, 100) is accessible for the Workflow Engine via extended web services interfaces (91, 71, 101). The Workflow Engine's Error Handling component (40) and the task-provided Error Handling Layer allow for the definition of a standard protocol between the Workflow Engine and invoked tasks (31) for automated error handling.

Abstract: Presenting a Pub/Sub service GUI interface to a subscribers computer system, the GUI interface comprising one or more topics to which the subscriber can subscribe, the Pub/sub service having a list of subscribers subscribing to a topic. The GUI interface preferably comprising widgets, enabling a subscriber to manage subscriptions to topics. The Pub/Sub service publishes messages of a topic according to the subscription list.

Abstract: The present invention relates to a buffered crossbar switch which provides a step of changing the size and/or number of queuing buffer entries to ensure optimum buffer memory usage independent of the size of data packets processed.

Abstract: Hierarchically paging data in a computer system wherein, when evicting a page of data from the computer system main storage, evicting the page to a first paging store (preferably NVRAM). When evicting a page of data from the first paging store, evicting the page to a second paging store (such as a disk). When the main store requires a page of data that is not in the main store and when the page of data is available in the first paging store, loading the third page of data into main store from first paging store. When the page of data is not available in the first paging store, loading the third page of data into main store from the second store. Optionally, pages of main store are saved and restored from NVRAM during a power-down, power-up sequence of events.

Abstract: Unrolling the “generate” statement of a hardware description language (“HDL”) and displaying the unrolled HDL. For a conditional generate the condition is evaluated. If the statement is true the enclosed HDL code will be displayed. For an iterative generate, the enclosing HDL will be displayed as many times as specified by the bounds of the iteration scheme. This allows, for example, simulation value annotations for signals declared inside the generate statement, semantic navigation inside the generate statements, and allows the user to visualize what is included in the target design.

Abstract: A storage system may include storage, a main pipeline to carry data for the storage, and a store pipeline to carry data for the storage. The storage system may also include a controller to prioritize data storage requests for the storage based upon available interleaves and which pipeline is associated with the data storage requests.

Abstract: In operating a dual core processor, a register file collects a history of the error state information for each core. The core error state data can be analyzed to understand the recovery sequence of events. The recorded error sequence over time presents a detailed history of the recovery sequence which is useful to understand complex error scenarios.

Abstract: A method for autonomic computing using a relational grammar represented in a mark-up language. In response to a system input change, the autonomic relational grammar and the autonomic system input is parsed to form an autonomic derivation tree representing autonomic system tokens, categories, attributes and relationships. An action is taken as defined by the relational grammar according to the input changes sensed.

Abstract: A wireless sensor network includes a controller connected with multiple antennas for sending out a beacon signal at different instants into different directions and for receiving a sensor signal. Furthermore, the wireless sensor network comprises a sensor having a receiver connected with a sensor antenna for receiving the beacon signal, a transmitter connected with the sensor antenna for sending out the sensor signal, and a control unit which takes care that the sensor signal is transmitted after the beacon signal has been received.

Abstract: A method, system and computer program product for computing a message authentication code for data in storage of a computing environment. An instruction specifies a unit of storage for which an authentication code is to be computed. An computing operation computes an authentication code for the unit of storage. A register is used for providing a cryptographic key for use in the computing to the authentication code. Further, the register may be used in a chaining operation.

Abstract: Host computing systems with the ability to efficiently identify the Infiniband™ (IB) addressing parameters corresponding to Fiber Channel I/O devices that are accessible through IB-to-Fiber Channel adapters. An efficient apparatus and program product is described to store the IB addressing parameters pertaining to individual Fiber Channel I/O devices on a subnet administration database, and an efficient mechanism to recover from the database, the IB addressing parameters corresponding to all physical paths by which a desired Fiber Channel I/O device is accessible.

Abstract: Managing a mass storage system that comprises a first and second storage space. A file index is generated listing each file along with a first characteristic quantity (FCQ), a second characteristic quantity (SCQ), and status information. Status information specifies if the file is held on the first or second storage space. A sample of files is selected from the file index containing a given number of files, wherein status information of each file specifies the first storage space. The FCQ of each file in the sample is used to determine the first critical value (FCV). The SCQ of each file in the sample is used to determine the second critical value (SCV). A first subset of files comprising each file where FCQ is larger than FCV, SCQ is larger than SCV, and specified by status information to be held on the first storage device is determined.