抢占式

Linux抢占式内核的研究与实现

Research and implementation on preemptive kernel of Linux

action=1表明这是在完整GC运行之前的一个抢占式的GC。

The action = 1 shows us that is was a preemptive GC , before a full GC runs .

基于随机Petri网的通信线路抢占式服务分析

Analysis of communication service with a preemption mechanism based on stochastic Petri nets

同样，非RTJava实现通常使用循环抢占式调度方法，该方法根据不可预测的调度顺序进行调度。

Also , non-RT Java implementations typically use a round-robin preemptive scheduling approach with unpredictable scheduling order .

本文描述了嵌入式操作系统μC／OS-Ⅱ的调度机制，通过任务级调度和中断级调度不同的比较，看出该系统的抢占式调度策略的高效性。

This paper describes scheduling mechanism in embedded μ C / OS - ⅱ and gives difference between scheduler in task and scheduler in interrupt . So efficiency of preemptive scheduling is better .

为解决该问题，本文设计了一种低复杂度抢占式交换结构，并提出了相应的抢占式短包优先调度算法（PSPF）。

To solve this problem , we study the low-complexity preemptive packet-mode scheduling and propose the algorithm called preemptive short packets first ( P-SPF ) .

分析了几种实现抢占式内核的方法，介绍了一种实现Linux可抢占式内核的方法，并对其实现细节进行了详细的说明。

Several methods to imply preemptive kernel were analyzed A method to implement a preemptive kernel of Linux was discussed and the implementation was explains in detail .

不可抢占式EDF调度算法的可调度性分析

Schedulability Analysis for Non - Preemptive EDF Scheduling Algorithm

在java技术中，线程通常是抢占式的而不需要时间片分配进程（分配给每个线程相等的cpu时间的进程）。

In Java technology , threads are usually preemptive , but not necessarily Time-sliced ( the process of giving each thread an equal amount of CPU time ) .

现在很多嵌入式应用都选择嵌入式Linux，由于Linux的宏内核和非抢占式调度方法并不适合嵌入式应用，现有的嵌入式Linux都是在对Linux进行改造后得到的。

Nowadays , a great number of embedded application adopt embedded Linux , however macro kernel and non-preempt able schedule of Linux are at adds with embedded system application .

在这种模型中，节点是按照1/k相位分布（PH）马尔可夫到达过程（MAP）中的非抢占式包含空闲的优先级队列进行建模的。

In this model , nodes are modeled as Markovian arrival process ( MAP ) / phase type ( PH ) distribution / 1 / k non-preemptive priority queues with vacation model .

经过测试证明，采用优先级继承协议的抢占式Linux内核能够解决优先级逆转的问题，满足系统的实时要求。

By testing , it is proved that preemptive linux kernel which adopts priority inheritance protocol can solve the problem of priority inversion , and satisfies real-time demand of system .

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。

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

在该方案中，两个单片机通过GAL实现对两路485通信、抢占式控制通道的控制和自身的内部通信。

In the system , two microcontrollers realize outer 485 communication , control of robbed control channel and inner communication by GAL.

现有的不可抢占式EDF调度算法的可调度性分析判定条件限定实时任务的截止期必须等于其周期，限制了它的使用范围。

There exist necessary and sufficient conditions for schedulability for a periodic task set scheduled by non-preemptive EDF algorithm .

为此本文提出了一种支持socket迁移的抢占式进程迁移系统，结合负载平衡算法可以有效解决以上问题。

This paper proposes a preemptive process migration system with the supporting of socket migration . Combined with the load balancing algorithm it can solve the above problem efficiently .

在RTLinux中，几乎每个内核行为都是抢占式的，因此需要减少低优先级线程被抢占的时间，并允许高优先级线程运行。

In RT Linux , almost every kernel activity is made preemptible , thereby reducing the time required for a lower-priority thread to be preempted and allow a higher-priority one to run .

II是一个完整的，可移植、可固化、可剪裁的抢占式多任务实时内核，并且开放源代码，得到了广泛应用。

The RTOS MicroC / OS-II is a complete , portable , ROMable , scalable , multitasking , real time kernel , and open source , so it has been widely used in the embedded system .

本文构建了一个利用扩展Linux内核，基于抢占式进程迁徙机制的Web服务器集群原型系统，对基于进程迁徙的Web服务器集群QoS保证机制进行了研究。

Therefor , we built a prototype server cluster system that based on preemptive process migration method by using extended linux kernel . Our purpose is to study method of QoS guarantee in cluster system that based on process migration .

这些更改提供了完全抢占式内核、线程中断处理程序、高分辨率计时器、优先级继承和健壮的互斥锁（mutex）。

These changes provide a fully preemptible kernel , threaded interrupt handlers , high-resolution timers , priority inheritance , and robust mutexes .

除了主机服务器上的调度器外，snippet处理器也具有自己的智能抢占式调度器，允许同时执行来自多个查询的snippet。

In addition to the scheduler on the host servers , the snippet processors have their own smart preemptive scheduler that allows snippets from multiple queries to execute simultaneously .

通过合理的任务划分和基于优先级的抢占式调度方式，提高了CPU的利用率，确保了电控喷油系统的实时性要求，有效提高了发动机的动态响应性能。

Using the proper partition of task and scheduling mechanism based on priority improved the efficiency of CPU , insured the need of real-time capability of electronic control fuel injection system and improved the transient response of diesel engines .

本文针对安全网关的实时性需求，阐述了Linux作为安全网关操作系统在实时性方面的不足，并从抢占式内核调度、实时任务的调度策略、任务的响应时间三个方面对Linux内核进行改进；

According to the security gateway real-time demand this thesis explains the defects of Linux real-time performance . Three aspects which are preemptive scheduling kernel , real-time task scheduling strategy and the response time of task are designed to improve the real-time performance of Linux .

WINDOWSCE操作系统是微软针对嵌入式领域开发的一个全新的操作系统，具备抢占式多任务功能以及强大的通信能力，广泛应用在信息设备、移动设备、电子产品以及嵌入式应用等非PC领域。

Windows CE is a new operating system for embedded development . Because of its ' preemptive multi-task capability and powerful communication ability , it is implemented widely in the information equipment , mobile devices , electronic products , embedded applications and even non-PC fields .

IR-OS采用了微内核结构设计，基于抢占式优先级调度，内核代码简洁，并提供良好的开发接口。

IR-OS adopts micro-kernel structure , preemptive scheduling strategy , and has user friendly API .

UC／OS-Ⅱ是一个源代码公开的抢占式内核实时嵌入式操作系统，只包含了任务调度、任务管理、时间管理、内存管理和任务间的通信与同步等基本功能。

UC / OS-II is a preemptive kernel embedded operation system whose source code is opened . It includes only basic functions , such as tasks scheduling , tasks management , time management , memory management and the communication and synchronization between tasks .

该文基于自主开发的ARTs-OS嵌入式实时操作系统，提出了一种可抢占式内核的实现方案，并在ARTs-OS核心上实现。

Based on ARTs-OS , an independence developed embedded real-time operating system , this paper gives the scheme to implement it , and also makes it implement in the ARTs-OS .

ARTs-OS是微内核抢占式嵌入式实时操作系统，在对ARTs-OS内核的内存管理模块研究基础上，重点研究动态存储分配算法（DSA），这也是提高嵌入式实时系统性能的关键。

Based on the study of memory management of the ARTs-OS , research is focused on the dynamic storage allocation algorithm ( DSA ), which is the key of improving the performance of embedded real-time system .

QP-nano设计的目的是工作在裸金属目标板，但是同样可以和提供可抢占式多任务的超级轻量级QuantumKernelNano（QK-nano）来配合使用。

QP-nano is designed to work with just a " bare metal " target board , but can also be combined with the very lightweight Quantum Kernel Nano ( QK-nano ) to provide preemptive multitasking capabilities ( requires more stack space ) .

ARTs-EDB根据事务的截止期，采用最早截止期最优先的算法分派优先级，并基于该优先级对事务进行有序调度，当不同优先级的事务对内存或数据等其他资源竞争时，基于优先级进行抢占式的调度。

ARTs-EDB uses the earliest deadline first algorithm to compute priority by the deadline of transaction , and schedules transactions based on the priorities . When the transactions having different priorities compete for inner memory or other resource , ARTs-EDB carrys on transaction preempting scheduling according to priority .