Operating systems can generally switch (context switching) faster between threads of the same process than between different process.
操作系统通常可以在相同进程中的不同线程之间更快速地切换(上下文切换)，而不是在不同进程之间切换。
Specifying that a process in role mgr_r may switch to a valid context in role cashier_r. But there is no line.
指定角色mgr_r中的进程可以切换到角色cashier_r中的有效上下文。
With modern Linux, though, a context switch between distinct processes might take only 15% more time than the corresponding context switch between same-process threads.
然而，在现代的Linux中，不同进程之间的上下文切换所花的时间只比同一进程的线程之间相应的上下文切换多15%。
Conceptually, a thread context switch can be viewed as a process changing its state.
从概念上讲，一次线程上下文切换相当于进程改变它的状态。
Conceptually, a thread context switch can be viewed as a process changing its state.
从概念上讲，一次线程上下文切换相当于进程改变它的状态。
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