硬实时任务

但是，调度产生的硬实时任务抖动与延迟直接影响到系统的稳定性和可靠性，甚至导致系统崩溃。

But the jitter and latency of hard real-time task caused by scheduling directly influences the stability and reliability of systems , even leads to the collapse of systems .

为严格保证硬实时任务的实时性，将其单独放在一个队列中，由指针数组的元素run-queue[0]指向，采用FIFO调度算法；

To ensure the requirements of the hard real-time tasks , these tasks were organized in a run queue pointed by run_ - queue [ 0 ] , an element of a point array , and FIFO schedule strategy was used for them .

硬实时任务在多处理机上的动态调度研究

Dynamic Scheduling of Hard Real-time Tasks on Multi-processors

在具体的设计中，对硬实时任务和软实时任务采用不同的反馈控制策略。

In concrete design , the hard real-time tasks and soft real-time tasks use different feedback control strategy .

按执行时间来分，数控系统任务被划分为周期性任务和非周期性任务；按重要性程度，数控系统任务被划分为硬实时任务和软实时任务。

The tasks are divided into periodic tasks and non-periodic tasks by executing-time , and also divided into hard real-time tasks and soft real-time tasks by their importance .

实验表明，混合任务调度器不仅能够保证硬实时任务的正常运行，而且可以提高软实时任务的响应时间，隔离了硬实时和软实时任务。

Experiments show that the hybrid scheduler not only guarantee the normal operation of hard realtime tasks , but also improve the response time of soft realtime tasks , isolate hard realtime and soft realtime tasks .

在混合实时系统中，调度器必须既保证所有硬实时任务严格按照其时间约束在截止期内完成，又要尽可能提高软实时任务和非实时任务的服务质量。

In hybrid real-time systems , schedulers must guarantee that all of hard real-time tasks will be finished by their deadlines as well as the improvement of QoS of soft real-time tasks and non-real-time tasks as greatly as possible .

在目标平台上实测结果表明，从硬实时任务中断产生到硬实时任务得到调度执行的最大延迟小于100μs，可以满足绝大多数嵌入式硬实时系统的要求。

The actual test result on target platform shows that the maximum latency from the generation of hard-real-time interrupt to the execution of hard-real-time task is less than 100 μ s , which could meet the need of most of the embedded hard-real-time systems .

硬实时周期任务和软实时非周期任务是实时系统中两种基本的任务类型，它们的混合调度问题是实时研究的重点之一。

The hard periodic task and soft aperiodic task are two basic types of real-time task ; their hybrid scheduling is an important part of real-time research .

硬实时系统中基于任务同步及节能的动态调度算法

Dynamic task scheduling algorithm with task synchronization and energy savings in hard real-time systems