利用时间陷阱实现多任务处理

本文叙述了利用ＤＯＳＢＩＯＳ中的１ＣＨ时钟中断并对之修改，以执行用户自定义的中断处理程序，实现多任务处理技术。     

基于HDLC协议的实时通信软件的设计与实现

本文首先简单介绍课题研制背景、ＨＤＬＣ通信协议以及８２７４串行通信控制器和８０３１单片机的性能特点,然后讨论了８２７４芯片在非向量中断模式下的编程技术,最后论述了基于ＨＤＬＣ协议的实时通信软件的设计与实现。     

用C语言实现捷联惯导系统的输入输出功能

捷联惯性导航系统（ＳＩＮＳ）是由惯性测量元件和导航计算机构成的多功能自主式导航系统，为满足这种一般单任务计算机的环境要求，本文介绍了利用Ｃ语言可对计算机硬件和内存直接进行操作的特点，实现导航计算机的输入输出功能。首先讨论了用Ｃ语言直接编码的思想步骤，然后介绍了有关接口软件的实现原理，主要包括通讯接口芯片的编程，中断控制器编程，中断服务程序的安装以及中断信号的处理等，实际应用结果表明：Ｃ语言是设计和     

多机分布式通信在数字程控交换机中的应用

介绍了多机分布式通信的一种实用技术。该技术的实现基于Ｉｎｔｅｌ的８３４４单片机，采用了国际标准化组织（ＩＳＯ）建议的ＨＤＬＣ／ＳＤＬＣ协议标准。通信速率高、传送距离远、性能安全可靠，解决了全分散控制的数字程控交换机多模块之间的通信问题。     

增加DOS的多文件显示打印功能

增加ＤＯＳ的多文件显示打印功能海南省科技情报研究所梁启健为解决多次键入ＴＹＰＥ命令，一次仅能处理一个文件的问题和增强磁盘文件管理能力，笔者通过编程实践，利用ＤＯＳ中断功能，用ＴｕｒｂｏＣ２．０编设了一个短小精悍的程序─ＴＹＰＥＳ．Ｃ，其ＴＹＰＥＳ．...     

华光系统与设备独立输出的实现

本文离利用打印中断向磁盘文件输出的实现方法，介绍了如何解决ＤＯＳ的重入，怎样利用ＣＰＵ的空宋中断以及计算Ｃ驻留程序长度等系统开发需要解决的问题，实现方法简单，具有一定的参考价值。     

中断控制器8259的级联

<正> 随着大规模集成电路的迅速发展,微型计算机的应用范围越来越广泛,并且微型机的处理能力也在不断地增强。一台微机甚至可以带很多接口,处理众多的信息。但是,如果一台微机要处理的中断信息多达八个以上,那么它本身的中断控制器的中断申请端口就显得不够用了。在这种情况下,我们可以采用中断控制器的级联技术,来扩展中断申请端口,增强微型计算机对多中断的处理能力。下面就以中断控制器8259的级联为例介绍这种技术。     

用PLC的中断技术实现故障处理

本文采用ＦＸ２－８０ＭＲ型ＰＬＣ实现了大布袋除尘器的控制，着重讨论了如何巧妙运用ＰＬＣ的中断技术来实现顺序控制中的故障处理。     

PLC在电焊条烘干炉上的应用

介绍采用ＯＭＲＯＮ－Ｃ２８Ｐ可编程控制器和模拟量输入模块Ｃ１Ｋ－ＡＤ组成的温度控制系统，实现了对烘干炉的自动控制，满足了多种规格焊条烘干的工艺要求。     

汉字图形用户界面开发

本文利用ＯＯＰ思想，阐述了ＤＯＳＤ环境下的汉字图形用户界面开发技术，以面向对象的Ｃ＋＋语言实现了一整套开发工具，利用它可以开发出ＤＯＳ环境下的全Ｗｉｎｄｏｗｓ风格的汉字处理图形用户界面。     

Optimization power consumption model of reliability-aware GPU clusters

Power controlling on reliability-aware GPU clusters with dynamically variable voltage and speed is investigated as combinatorial optimization problem, namely the problem of minimizing task execution time with energy consumption constraint and the problem of minimizing energy consumption with system reliability constraint. The two problems have applied in general multiprocessor computing and real-time multiprocessing systems where energy consumption and system reliability both are important. These problems which emphasize the trade-off among performance, power and reliability have not been well studied before. In this research, a novel power control model is built based on Model Prediction Control theory. Maximum Entropy Method is used to determine partial ordering relation of control variable and to identify the quality of solutions. Our controller can cap the redundant energy consumption by dynamically transforming energy states of the nodes in GPU cluster. We compare our controller with the control scheme, which does not consider the system reliability. The experimental results demonstrate that the proposed controller is more reliable and valuable.     

Evaluating scheduling policies for fine-grain communication protocols on a cluster of SMPs

Distributed-memory parallel computers and networks of workstations (NOWs) both rely on efficient communication over increasingly high-speed networks. Software communication protocols are often the performance bottleneck. Several current and proposed parallel systems address this problem by dedicating one general-purpose processor in a symmetric multiprocessor (SMP) node specifically for protocol processing. This protocol processing convention reduces communication latency and increases effective bandwidth, but also reduces the peak performance since the dedicated processor no longer performs computation. In this paper, we study a parallel machine with SMP nodes and compare two protocol processing policies: the Fixed policy, which uses a dedicated protocol processor; and the Floating policy, where all processors perform both computation and protocol processing. The results from synthetic microbenchmarks and five macrobenchmarks show that: (i) a dedicated protocol processor benefits light-weight protocols much more than heavy-weight protocols, (ii) a dedicated protocol processor is generally advantageous when there are four or more processors per node, (iii) multiprocessor node performance is not as sensitive to interrupt overhead as uniprocessor node because a message arrival is likely to find an idle processor on a multiprocessor node, thereby eliminating interrupts, (iv) the system with the lowest cost-performance will include a dedicated protocol processor when interrupt overheads are much higher than protocol weight—as in light-weight protocols.     

SMP系统WindowsNT移植中的中断处理技术

本文介绍了ＷｉｎｄｏｗｓＮＴ在某ＳＭＰ系统中移植的处理技术，包括中断的初始化，中断的多机分配与登录，中断的管理与处理等技术。     

基于MSP430的多处理器通信技术研究

MSP430系列单片机处理能力强大，超低功耗设计，功能高度集成，适合众多的场合使用。但是在大型复杂的场合或者实时性要求较高的场合，使用一个处理器处理所有的任务，总是显得有些不足。提出用多片MSP430组成多处理器系统，利用MSP430固有的UART硬件模块，采用MODBUS通讯协议实现不同处理器之间的数据交换。     

Implementation of two projection methods on a shared memory multiprocessor: DEC VAX 6240

In this paper, we compare the relative performance of two iterative schemes, based on projection techniques, on a shared memory multiprocessor - VAX 6240. We consider the CG accelerated Block-SSOR method and the CG accelerated Symmetric-Kaczmarz method for the solution of large non-symmetric systems of linear equations. We show that the regular structure of many matrices can be exploited by the CG-accelerated Block-SSOR method to provide good speedup in a multiprocessing environment. However, the CG accelerated Symmetric-Kaczmarz method, while being a viable alternative on a scalar machine, is unable to benefit from multiprocessing.     

Comparison of five multiprocessor systems

This paper generalizes the traditional dataflow model of computation and defines the essential problems in multiprocessing: control implementation, program partitioning, scheduling, synchronization, and memory access. The paper assumes that these essential problems are axes of a multiprocessor design space and that the solutions to these problems are values on the axes. Each point in the space represents a multiprocessor including a computational paradigm that a user must follow to achieve high performance and efficiency on the particular machine. Thus, a classification of machines from the user's point of view is introduced naturally. Five well-known multiprocessors are compared using this classification scheme.     

Information system design for real-time multiprocessing systems

Most research on multiprocessing has concentrated on synchronization methods through special language statements and/or operating system capabilities. In contrast, this paper is concerned with identifying and developing system design principles for information systems in a real-time multiprocessing environment. We do not assume that the processes of the system are independent. We identify how interference can occur and show what is necessary to prevent it. Theorems are proven that show how to determine which processes cannot be multiprocessed. These theorems create the basis for determining what portions of a program need to be placed in a critical region. We show that even some disjoint processes may not be multiprocessed. We then identify system design principles that will yield a better system with respect to total throughput time and multiprocessor utilization. Our results do not depend upon any specific synchronization method.     

Matrix DSP中断处理系统的设计与实现

本文研究并实现了一种快速响应中断请求信号的中断处理系统。设计过程中,在保证功能正确的前提下,尽量减小中断的延时开销。本文硬件中断和软件中断的处理机制相同,中断嵌套机制非常灵活。与传统的只有不可屏蔽中断源能打断可屏蔽中断源的中断嵌套机制不同,本文中断处理系统只要是优先级较高的中断信号就可以打断优先级较低的中断信号。这种机制简化了控制逻辑,减少了中断延时开销,使得延时开销从传统的5拍缩短为4拍。