> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/man4/sched_ule.4.md).

# sched\_ule.4

`sched_ule` — ULE 调度器

## 名称

`sched_ule`

## 概要

`options SCHED_ULE`

## 描述

`sched_ule` 调度器提供了许多传统系统调度器 [sched\_4bsd(4)](/man/man4/sched_4bsd.4.md) 中没有的高级调度器功能。这些功能针对 SMP 和交互性，包括：

* 线程 CPU 亲和性。
* CPU 拓扑感知，包括超线程。
* 每 CPU 运行队列。
* 交互式启发式算法，可检测交互式应用程序并在高负载下优先调度。

以下 sysctl 与 `sched_ule` 的操作相关：

**`kern.sched.name`** 此只读 sysctl 报告活动调度器的名称。

**`kern.sched.quantum`** 此读写 sysctl 报告或设置授予线程的时间片长度（以微秒为单位）。

## 参见

[sched\_4bsd(4)](/man/man4/sched_4bsd.4.md), [sysctl(8)](/man/man8/sysctl.8.md)

## 历史

`sched_ule` 调度器最早出现于 FreeBSD 5.1。

## 作者

Jeff Roberson <jeff@FreeBSD.org>


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