Bringing theory into practice: A userspace library for multicore real-time scheduling
Bringing theory into practice: A userspace library for multicore real-time scheduling
复制标题
将理论付诸实践：用于多核实时调度的用户空间库
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
James H. Anderson
中科院分区：
文献类型：
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作者：
Malcolm S. Mollison;James H. Anderson
随着多核计算硬件变得越来越普遍，针对多核系统的实时调度理论变得越来越复杂和多样化。实时操作系统（RTOS）不适合这种快速的变化，缓慢的RTOS生态系统越来越落后于实时调度理论的进步。因此，支持在用户空间中运行的中间件软件层中的新功能（即，在RTOS内核之外）。在本文中，我们描述了第一个用户空间调度程序，支持抢占式，动态优先级，迁移实时任务的多核硬件，并报告经验延迟和开销测量。在八核英特尔至强平台上，在大多数测试配置下，这些测量值在一到几十微秒的范围内。我们相信，这种方法可以证明上级的基于内核的方法，支持未来的真实世界的实时应用程序的子集。
As multicore computing hardware has become more ubiquitous, real-time scheduling theory aimed at multicore systems has become increasingly sophisticated and diverse. Real-time operating systems (RTOSs) are ill-suited for this kind of rapid change, and the slow-moving RTOS ecosystem is falling further and further behind advances in real-time scheduling theory. Thus, supporting new functionality in a layer of middleware software running in userspace (i.e., outside the RTOS kernel) has been proposed. In this paper, we describe the first userspace scheduler that supports preemptive, dynamic-priority, migrating real-time tasks on multicore hardware, and report empirical latency and overhead measurements. On an eight-core Intel Xeon platform, these measurements are in the range of ones to tens of microseconds under most tested configurations. We believe that this approach may prove superior to a kernel-based approach for supporting a subset of future real-world realtime applications.