A thread is a sequence of executable commands that can run concurrently within a process, while a process is a complete program in execution, including its code, data, and system resources.
调用kernel_thread()函数可以启动一个内核线程,其定义是特定于体系结构的,但函数原型都是相同的(API兼容) 线程启动后一直等待,该函数接下来负责帮助内核掉哟个deamonize以转换为守护进程,直至内核请求线程执行某一特定操作,这依次引发下列操作1) 该函数从内核线程释放其父进程(用户进程)的所有资源(例如内存上下文、文件...
In the view of the memory management, modern OS with multitasking, normally implement dynamic relocation instead of static. All the program layout in the address space is virtually same. This dynamic relocation (in processor term it is called dynamic address translation) provides the illusion that:...
A process can be broadly categorized into the following two types based on its execution: I/O-Bound Process: A process whose execution time is determined mainly by the amount of time it spends completing I/O operations. CPU-Bound Process: A process whose execution time is determined by th...
Vista's I/O prioritization is based on the priority of the thread doing the I/O, which is dependent on the priority class of the process doing the I/O. Therefore, adjustment of the thread priorities will propagate to the I/O of that thread. Specific I/O prioritization is not supported...
The scheduler within RPD implements a cooperative multitasking model, in which each thread is responsible for releasing the CPU after an atomic operation has been completed. This design allows several closely related threads to coexist without the overhead of interprocess communication and to scale ...
Finite-state machine (FSM) model Trying to capture this behavior as sequential program is a bit awkward Instead, we might consider an FSM model, describing the system as: Possible states E.g., Idle, GoingUp, GoingDn, DoorOpen Possible transitions from one state to another based on input E...
Cloud.com has a few things going for it: based on their momentum, their software seems to work, which is saying a lot for something as new as cloud computing. Many of the “real cloud” projects out there require a tremendous amount of what we used to call Systems Integration (now “...
A process is an executing program whereas, the thread is a small part of a process. Each process has its own address space whereas, the threads of the same process share the address space as that of the process. In process based multitasking, more than two processes can run at the same...