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2025-05-21 17:15本頁(yè)面
【正文】 advantages. The use of multithreaded so we must be careful to deal with these threads of the creation, scheduling and work release. There are many ways to design multithreaded applications. As shown in the back of the article, I will give detailed examples of programming, through these examples。 and a lot of CPU time is used for thread scheduling。 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 reimplementation 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 plete 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 position. 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 nonpreemptive 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 t
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