Description: 嵌入式VxWorks开发所需典型例程源代码，包括消息队列，信号量，时钟，优先级反转，中断等常见处理．-VxWorks embedded typical routines required for the development of the source code, including the Message Queue, semaphores, the clock, priority inversion, and other common treatment interruption. Platform: |
Size: 9693 |
Author:李薇 |
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Description: In a preemptive priority based RTOS, priority inversion
problem is among the major sources of deadline
violations. Priority inheritance protocol is one of the
approaches to reduce priority inversion. Unfortunately,
RTOS like uC/OS can’t support priority inheritance
protocol since it does not allow kernel to have multiple
tasks at the same priority. Although it has different ways
to avoid priority inversion such as priority ceiling
protocol, developers still have some difficulties in
programming real time applications with it. In this paper,
we redesign the uC/OS kernel to provide the ability to
support round robin scheduling and implement priority
inheritance semaphore on the modified kernel. As result,
we port new kernel with priority inheritance semaphore to
evaluation board, and evaluate the execution time of each
of the kernel service as well as verify the operations of
our implementation. Platform: |
Size: 135878 |
Author:刘天宏 |
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Description: 嵌入式VxWorks开发所需典型例程源代码，包括消息队列，信号量，时钟，优先级反转，中断等常见处理．-VxWorks embedded typical routines required for the development of the source code, including the Message Queue, semaphores, the clock, priority inversion, and other common treatment interruption. Platform: |
Size: 9216 |
Author:李薇 |
Hits:
Description: In a preemptive priority based RTOS, priority inversion
problem is among the major sources of deadline
violations. Priority inheritance protocol is one of the
approaches to reduce priority inversion. Unfortunately,
RTOS like uC/OS can’t support priority inheritance
protocol since it does not allow kernel to have multiple
tasks at the same priority. Although it has different ways
to avoid priority inversion such as priority ceiling
protocol, developers still have some difficulties in
programming real time applications with it. In this paper,
we redesign the uC/OS kernel to provide the ability to
support round robin scheduling and implement priority
inheritance semaphore on the modified kernel. As result,
we port new kernel with priority inheritance semaphore to
evaluation board, and evaluate the execution time of each
of the kernel service as well as verify the operations of
our implementation.-In a preemptive priority based RTOS, priority inversionproblem is among the major sources of deadlineviolations. Priority inheritance protocol is one of theapproaches to reduce priority inversion. Unfortunately, RTOS like uC/OS can t support priority inheritanceprotocol since it does not allow kernel to have multipletasks at the same priority. Although it has different waysto avoid priority inversion such as priority ceilingprotocol, developers still have some difficulties inprogramming real time applications with it. In this paper, we redesign the uC/OS kernel to provide the ability tosupport round robin scheduling and implement priorityinheritance semaphore on the modified kernel. As result, we port new kernel with priority inheritance semaphore toevaluation board, and evaluate the execution time of eachof the kernel service as well as verify the operations ofour implementation. Platform: |
Size: 135168 |
Author:刘天宏 |
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Description: uC_OS-II内核实验指导书和实验程序，是我们做uC_OS-II内核实验时的资料，实验程序有：内存管理、任务管理、时钟中断、消息队列、优先级反转、优先级继承、哲学家就餐等。-uC_OS-II core experiments and experimental procedures for the guidance of the book is that we make uC_OS-II core experiment data, experimental procedures are as follows: memory management, mission management, the clock interrupt, message queues, priority inversion, priority inheritance, dining philosophers, etc.. Platform: |
Size: 740352 |
Author:houlongting |
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Description: 超级好的vxworks入门实验课：一共9个pdf文件，每个都是精华，我是下载了9次才搞定，绝对超值，初学者很有必要看看。
目录：
1．学习使用Tornado 开发环境；测量程序的执行时间
2. 学习创建多个任务
3. 学习使用信号量实现共享资源的保护
4. 学习使用消息队列进行通信
5. 学习并验证时间片轮转调度
6. 学习并验证基于优先级的抢占式调度
7. 理解优先级倒转问题 学习使用优先级继承以解决优先级倒转问题
8. 学习使用信号
9. 了解VxWorks 的中断机制 学习编写中断处理程序
-Super good VxWorks entry experimental courses: a total of nine pdf files, are the essence of each, I downloaded 9 times only to get absolute value, it is necessary to see beginners. Contents: 1. Learning to use the Tornado development environment measurement procedure execution time 2. Learning to create more than one mission 3. Learning to use semaphores to protect shared resources to achieve 4. Learning to use the message queue to communicate 5. To study and verify the time slice Round-Robin Scheduling 6. Learning and verify that priority-based preemptive scheduling 7. to understand the priority inversion problem learning to use priority inheritance to solve the priority inversion problem 8. learning to use signal 9. understanding of the interruption mechanism VxWorks interrupt handling procedures for the preparation of learning Platform: |
Size: 730112 |
Author:jinleize |
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Description: VxWorks系统的任务调度机制.pdf
Vxworks经典论文
摘要：针对多任务系统而言，调度是指根据一定的算法．将CPU 分配给符合条件的任务使用，不同的系统任务调
度机制不同。本文介绍VxWorks系统的任务调度策略和算法．分析优先级倒置产生的原因并给出解决方案。重点阐述静
态表方式的实现方法并给出C语言程序框架。
关键词：调度；任务；优先级；倒置；静态表-VxWorks system task scheduling mechanism. PdfVxworks classic abstract: for multi-mission systems, scheduling refers to according to certain algorithms. CPU will be allocated to the mission in line with the conditions of the use of different systems task scheduling mechanism. This article describes the system VxWorks task scheduling strategies and algorithms. Analysis of priority inversion causes and gives solutions. Focuses on the static table methods realize the way and gives the framework of C language programming. Key words: Scheduling mission priority level inversion static table Platform: |
Size: 122880 |
Author:GB |
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Description: MyTask、YouTask和ThreeTask 。在主函数中创建任务MyTask。而YouTask和ThreeTask由任务MyTaskTask创建，其优先级分别为2、4、6。这三个任务都要占用资源s，任务YouTask访问时间短一些，在任务MyTask和任务ThreeTask利用while(OSTime<T) {}增加访问时间，T值分别为300，500。MyTask、YouTask和ThreeTask采用OSTimeDly(K)延时等待，K值均为200。这样出现任务优先级反转。为了解决优先级反转，设计何种信号量既解决此问题。请先指出任务优先级反转出现在哪里? 后显示克服过程-MyTask, YouTask and ThreeTask. In the main function to create a task MyTask. And YouTask and ThreeTask created by the task MyTaskTask its priority 2,4,6 respectively. MyTask, YouTask and ThreeTask used OSTimeDly (K) wait delay, K values are 200. This task priority inversion occurred. In order to solve the priority inversion, design is what semaphores to solve this problem. Please noted that the task priority inversion appear? After the show to overcome the process of Platform: |
Size: 1024 |
Author:霍钱进 |
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Description: it detects the priority inversion where the high priority task need not have to wait for low priority task Platform: |
Size: 9216 |
Author:ravi |
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Description: it detects the priority inversion where the high priority task need not have to wait for low priority task Platform: |
Size: 9216 |
Author:pojrkwrpr |
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Search - priority Inversion