priority queue

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priority queue

(programming)
A data structure with three operations: insert a new item, return the highest priority item, and remove the highest priority item. The obvious way to represent priority queues is by maintaining a sorted list but this can make the insert operation very slow. Greater efficiency can be achieved by using heaps.
References in periodicals archive ?
After an introduction to Scala, it covers the basics of object-orientation and software development, object-orientation in Scala, abstraction and polymorphism, GUIs (graphical user interfaces) and graphics, other collection types, stacks and queues, multithreading and concurrency, low-level multithreading and Java libraries, stream input/output and XML, networking, linked lists, priority queues, refactoring, recursion, trees, regular expressions and context-free parsers, binary heaps, direct access binary files, spatial trees, augmenting trees, and hash tables.
The system needs priority queuing modeling for the IP-layer QoS scheduler, and we therefore apply the queuing theory of non-preemptive priority queues in the M/G/1 system using [20].
LLQ scheduling is an enhancement of Class Based Weighted Fair Queuing CBWFQ in which one or more strict priority queues are integrated to solve latency issues in multimedia applications that makes it ideal for jitter and delay sensitive applications.
Among the topics are a Python primer, array-based sequences, priority queues, sorting and selection, and graph algorithms.
Jobs are then scheduled from the head of a higher priority queue, however jobs in the lower priority queues are given service only if all queues of higher priority are empty.
From housing an "Open Repair Centre" to offering old laptop disposal service for the green-minded professional, time-saving priority queues for its growing student user population and extended operating hours for executives, Fujitsu customers can expect to be served quickly and extensively, at a central location.
Note that priority inversion is avoided by scheduling first from higher priority queues.
Many 10/100 (Fast Ethernet) switches support only one or two priority queues per port.
Features include an ultracompact chassis - the product is only three rack units high and mounts in a standard rack - and support for five priority queues per logical port to offer truly differentiated IP services.
All these algorithms employ priority queues (see Section 4).

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