是什么让线程的执行顺序不可预测?

问题描述

是什么让线程的执行顺序不可预测?调度程序是否在某个时候使用随机数或检查系统资源或查看哪个线程已等待足够长的时间或...?

What makes the execution order of threads unpredictable? Does the scheduler at some point use random numbers or check system resources or see which thread has waited long enough or ...?

推荐答案

调度器通常是操作系统的调度器.它受许多因素的影响，包括机器上的其他进程在做什么，硬件在做什么(中断)等.根据操作系统，我想有时可能会涉及随机数，但我怀疑一般不会.更多的只是多个可变时间间隔可以重叠的不可预测的方式.

The scheduler is, usually, the OS's scheduler. It is influenced by many factors, including what other processes on the machine are doing, what the hardware is doing (interrupts), etc. Depending on the OS, I suppose there may sometimes be random numbers involved, but I suspect generally not. It's more just the unpredictable way that multiple variable time intervals can overlap.

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