摘要:
Implementation primitives for concurrent array-based stacks, queues, double-ended queues (deques) and wrapped deques are provided. In one aspect, each element of the stack, queue, deque or wrapped deque data structure has its own ticket lock, allowing multiple threads to concurrently use multiple elements of the data structure and thus achieving high performance. In another aspect, new synchronization primitives FetchAndIncrementBounded (Counter, Bound) and FetchAndDecrementBounded (Counter, Bound) are implemented. These primitives can be implemented in hardware and thus promise a very fast throughput for queues, stacks and double-ended queues.
摘要:
A database access facility for accessing databases includes a monitoring function which monitors accesses by requestors of database data. The monitoring function tracks which database fields are requested to dynamically determine the fields which the application needs. Once sufficient tracking data is obtained, subsequent accesses to the database on behalf of an application are automatically modified by the application server to request only the fields which are likely to be needed. Preferably, the database access facility is an application server for one or middle tier applications which access the database on behalf of multiple clients in a three-tier client-server environment.
摘要:
A computer system includes a first electronic device having a first display. The first display includes a first electronic image having an anchor point. The computer system also includes a second electronic device that is moveable relative to the first electronic device. The second electronic device includes a movement sensor and a second display operatively connected with the first display. The second display includes a second electronic image that is associated with the first electronic image. Upon sensing movement of the second electronic device relative to the first electronic device, the movement sensor determines a direction of the movement relative to the anchor point and triggers a shifting of the second electronic image relative to the anchor point of the first electronic image.
摘要:
Methods, systems, devices and program products are provided for effecting compliance with power usage specifications through positive feedback to a monitoring entity. A power usage specification is provided for a device for a task performed by the device using the device to perform the task, embodiments monitoring power used by the device to perform the task to generate power usage data, comparing the power usage data to the power usage specification, and if the power usage data exceeds the power usage specification, automatically providing a reward to a device end-user selected as a function of a value of the specification exceeding and an agreement with the end-user or a third party. Power usage specifications may comprise predicted power usage values and requirements for the device to perform the task during a first power rate period having a lower energy or resource cost than a second power rate period.
摘要:
Middleware may dynamically restrict or otherwise allocate computer resources in response to changing demand and based on prioritized user access levels. Users associated with a relatively low priority may have their resource access delayed in response to high demand, e.g., processor usage. Users having a higher priority may experience uninterrupted access during the same period and until demand subsides.
摘要:
A method, apparatus and program product include an object heap having memory space dedicated to individual threads. Individual threads may allocate objects into their respective, assigned spaces. If their space should become full, the thread may allocate an object to a shared space of the object heap. Filling the space in this manner may allow the thread to continue working, without pauses. The thread may be continued to allocate objects and otherwise complete the work until it is done, and before any associated cleanup and consequent pauses. A garbage collection algorithm minimizes pauses for a given transaction by making the garbage collection scheme aware of the presence of end to end transactions. This awareness may allow the system to make appropriate decisions for optimizing object allocation processes.
摘要:
A method, apparatus, system, and signal-bearing medium that, in an embodiment, send units of work to grid executors, create training data based on the performance of the grid executors, and train a neural network via the training data. The training data includes pairs of input and output data, where the input data is the types of the units of work and the output data is the service strengths of the grid executors. Once the neural network has been trained, subsequent units of work have their grid executors selected by inputting the types of the units of work to the neural network and receiving a service strength from the neural network as output. The grid executors are then selected based on the output service strength from the neural network. In this way, in an embodiment, the grid performance may be increased.
摘要:
A communication system including a database adapted to store communication tag information; and a database agent. The database agent is adapted to determine if a communication has a task tag. The database agent is adapted to transfer predetermined communication tag information of the task tag of the communication to the database. The database agent is adapted to automatically send a communication based upon information stored in the predetermined communication tag information.
摘要:
Implementation primitives for concurrent array-based stacks, queues, double-ended queues (deques) and wrapped deques are provided. In one aspect, each element of the stack, queue, deque or wrapped deque data structure has its own ticket lock, allowing multiple threads to concurrently use multiple elements of the data structure and thus achieving high performance. In another aspect, new synchronization primitives FetchAndIncrementBounded (Counter, Bound) and FetchAndDecrementBounded (Counter, Bound) are implemented. These primitives can be implemented in hardware and thus promise a very fast throughput for queues, stacks and double-ended queues.
摘要:
Useful work or services can be automated or otherwise facilitated or solutions to real world events developed by emulation of a real-world environment (which can contain objects representing virtual objects) with a virtual environment and generating a prioritized sequence of locations and associated tasks in accordance with resources related to the event in a virtual universe. Performance of the prioritized tasks at the prioritized locations is facilitated in the virtual universe by locally generating teleportation invitations corresponding to locations in the ordered sequence of locations.