如何以编程方式更改linux内核进程优先级? [英] How to change linux kernel process priority in programmatic way?

问题描述

我发现了一些函数"renice"，该函数改变了进程的美观值.

I found some function 'renice' that changes the nice value of process.

但是我想知道如何更改内核代码的优先级.

But I want to know how to change priority in kernel code.

可以只更改进程的sched_entity中的优先级值吗?

Is it okay that just changing the priority value in sched_entity of process?

推荐答案

如果要以编程方式更改进程的美观程度，建议不要在内核结构中直接设置这些值.而是可以使用几个POSIX函数，例如setpriority或pthread_setschedparam.

If you want to change the niceness of the process programmatically, I would advise against setting these values in the kernel struct directly. Instead, you can utilize several POSIX functions such as setpriority or pthread_setschedparam.

Linux上的默认调度程序策略是SCHED_OTHER，因此默认情况下，您会使用这两个功能来实现相同的目的，因为SCHED_OTHER只是使用尼斯级别进行调度.

The default scheduler policy on Linux is SCHED_OTHER, so you're, by default, achieving the same thing using these two functions, as SCHED_OTHER just uses niceness level to schedule.

如果可以访问task_struct，则要直接实现此目的，只需在task_struct中设置static_prio.

If you have access to the task_struct, in order to achieve this directly, you just need to set static_prio in task_struct.

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