计算机专业毕业论文文献翻译资料

计算机专业毕业论文文献翻译资料附录一

Compared to multi-threaded operating system, means is that it can run a program with

the ability of different parts; each part of the implementation was as a thread. Therefore, in the preparation of applications, we have very good design in order to avoid the implementation of the different threads of mutual interference. Which will help us to design robust procedures, we can make at any time when necessary to add the thread.

Thread can be described as a micro-process; it has a starting point for the

implementation of the order of series and a destination. It is responsible for the maintenance of its own stack, the stack for exception handling, priority scheduling and a number of other threading systems re-implementation of the information needed. From this concept, it seems there is no thread with the process of distinction, in fact, thread and process is certainly different: the process of a complete independence to have their own memory space and data, but the same thread within a process is shared memory space and data. Corresponds to a process for some procedures, it is by the same procedure in which an independent threads running at the same time the composition. Thread is sometimes referred to as parallel program running on lightweight processes, threads are lightweight processes called because it is dependent on the operation

and process the context of the environment, and the process of using resources. In a process, the threads are preemptive scheduling or non-preemptive model. In seizing the model, the operating system responsible for the allocation of CPU time for each process, once the current process used to finish the distribution of CPU time, the next operating system will determine the CPU time is occupied by a single thread. Thus the operating system will periodically interrupt the current thread is running, the allocation will be cup to the next in the queue waiting for a thread.

Therefore, a thread can not be any exclusive CPU. Occupied by each thread CPU time

depends on the process and the operating system. Process assigned to each thread a short period of time that we feel all the threads are executed at the same time. In fact, the system time for each process, 2 ms, and then scheduling other threads. It the same time, he maintained

all the threads and circulation, the distribution of small amount of CPU time to

the thread. Thread switching and scheduling is so fast that the feeling is that all the threads

are executed simultaneously.

What does scheduling mean? Scheduling processor storage means to be implemented by the end of the process of CPU time for the state and a future time loading the state of the