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RTSJ

网络实时规范(real time specification for java)

RTSJ

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RTSJ

实时规范(real time specification for java)

Java 的实时规范 (RTSJ) 确保至少提供 28 个优先级。不支持对非默认线程策略的控制 RTSJ 向程序员提供选择，例如，先入先 …

例句：

The RTSJ is a "specification for additions to the Java platform to enable Java programs to be used for real-time applications . "

RTSJ 是 “一种使 Java 程序能够用于实时应用程序的 Java 平台规范 ”。

The RTSJ requires that an implementation of the specification must provide a contiguous range of at least 28 priorities for RT threads .

RTSJ 要求规范的实现必须为 RT 线程提供至少 28 个连续的优先级。

With the RTSJ, true priorities and a fixed-priority preemptive scheduler with priority-inheritance support is required for RT threads .

在 RTSJ 规范中，RT 线程需要真正的优先级，以及具有优先级继承支持的固定优先级抢占式调度程序。

For memory management RTSJ uses the concept of a memory area .

对于内存管理，RTSJ 用到了一个 “内存域 ”的概念。

Implementing the RTSJ requires broad support from the underlying operating system as well as components of the JRE.

要实现 RTSJ 需要来自底层操作系统及 JRE 组件的广泛支持。

Understanding the management of priorities and priority queues is useful in understanding the RTSJ changes to threading and synchronization .

理解对优先级和优先级序列的管理有助于理解 RTSJ 针对线程化和同步所作的更改。

Threads within the RTSJ can be one of three types , non real-time, soft real-time and hard real-time.

RTSJ 中的线程可以是下述三种类型之一：非实时线程、软实时线程和硬实时线程。

This is closest to the spirit of the RTSJ but it does differ from the SCHED_OTHER policy used for regular Java threads .

这与 RTSJ 的精神最为接近，但确实与用于普通 Java 线程的 SCHED_OTHER 策略不同。

The RTSJ includes specific mechanisms for running threads in a periodic fashion.

RTSJ 包含了专门针对周期性执行线程的机制。

Backwards compatibility, so that any class file generated by a Java compliant compiler would run on a RTSJ virtual machine .

向后兼容性。任何兼容的 Java 编译器生成的类文件都能继续在 RTSJ 虚拟机上运行。

This article describes aspects of RTSJ threading and synchronization by discussing how thread priorities and priority queues are managed.

本文通过讨论如何管理线程优先级和优先级序列来描述 RTSJ 线程化和同步。

RTSJ applications can have threads of all three types running simultaneously .

RTSJ 应用程序可以同时运行这三种类型的线程。

The RTSJ specification also allows developers to do something that is impossible in standard Java : access physical memory directly .

RTSJ 规范还允许开发者做一些在标准版 Java 中不可能办到的事：直接访问物理内存。

Priority inheritance is mandated by the RTSJ.

优先级继承由 RTSJ 规定。

The solution for sharing data between NHRTs and heap-based threads provided by the RTSJ is the WaitFreeQueue classes .

RTSJ 提供了一种在 NHRT 和基于堆的线程间共享数据的解决方案，那就是 WaitFreeQueue 类。

For these cases , you can use the RTSJ to avoid GC-incurred pause times .

此时，您可以使用 RTSJ 来避免 GC 导致的暂停时间。

You can find more information about these facilities in the RTSJ.

您可以在 RTSJ 中找到关于这些工具的更多信息。

The Real-time Specification for Java (RTSJ) provides various solutions to the problem of GC pauses .

Java 实时规范（RTSJ ）为 GC 暂停的问题提供了多种解决方案。

The RTSJ spec requires a program re-write to use scoped memory .

RTSJ 规范要求程序重写以使用有限的内存。

Because of priority inheritance , priority adjustments are required by the RTSJ.

由于优先级继承的原因，RTSJ 需要使用优先级调整。

The JLS doesn't specify how these queues are managed , but the RTSJ does stipulate the behavior .

JLS 没有指定如何管理这些队列，但是 RTSJ 规定了这个行为。

Immortal memory is a resource required by the RTSJ that is not subject to GC.

永久内存是 RTSJ 所需要的并且不服从 GC 的资源。

These are only some aspects of the RTSJ; see Resources for a link to the complete specification .

这些只是 RTSJ 的一些方面，有关完整规范的链接，请参阅参考资料。

The spirit of the RTSJ is that all queues of threads are FIFO and priority based .

RTSJ 的原理是所有的线程队列都是 FIFO 并且是基于优先级的。

For example, the RTSJ introduces new real-time (RT ) thread types that must follow a stricter scheduling policy than a regular Java thread .

例如，RTSJ 引入了一些新的实时（RT ）线程类型，它们必须遵守比普通 Java 线程更加严格的调度策略。

RTSJ

RTSJ

实时规范(real time specification for java)

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