In most real world systems, objects vastly outnumbers threads. This paper shows how this characteristic can be used to implement efficient Java TM monitors in a way that reduces the number of needed monitors to be equ...
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ISBN:
(纸本)0769510892
In most real world systems, objects vastly outnumbers threads. This paper shows how this characteristic can be used to implement efficient Java TM monitors in a way that reduces the number of needed monitors to be equal to the number of threads, while fulfilling the Java (TM) synchronized semantics. Some additional benefits related to priority inheritance and hierarchical resource locking will also be briefly explored.
The primary(1) performance objective in distributed real-time database systems (DRTDBS) is to minimize the number of transactions missing their deadlines. Demanding nature of this objective makes traditional approache...
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ISBN:
(纸本)9781450363419
The primary(1) performance objective in distributed real-time database systems (DRTDBS) is to minimize the number of transactions missing their deadlines. Demanding nature of this objective makes traditional approaches and even existing approaches inadequate. The past researches have been mostly devoted to outspreading traditional transaction processing methods to resolve the issues. However, for the design of DRTDBS, new policies/protocols must be designed to resourcefully handle the concurrent execution of transactions. Our aim is to develop new concurrency control protocols, commit protocols and to compare their performance with existing protocols. Another plan is to extend our work to nested transaction model, replication environment and possibly mobile environment.
A real-time multitasking operating system requires rapid response to external *** it is very important to select an appropriate task scheduling *** multiple tasks seeking access to shared resources will lead to priori...
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A real-time multitasking operating system requires rapid response to external *** it is very important to select an appropriate task scheduling *** multiple tasks seeking access to shared resources will lead to priority *** kinds of solutions to resolve the problem are proposed,and their disadvantages are *** technique of priority inheritance is analyzed in detail,and is improved *** and tests have proved the efficiency and practicability of this way to resolve priority inversion.
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