Virtual computersystems can improve software reliability by localizing and controlling the impact of operating system errors and by permitting large systems to be constructed from a set of independent and less comple...
详细信息
Virtual computersystems can improve software reliability by localizing and controlling the impact of operating system errors and by permitting large systems to be constructed from a set of independent and less complex modules. In this discussion, the authors used availability as an indicator of reliability;characterized the overall value of a system in terms of a utility function defined on the possible degrees of availability;demonstrated a number of conditions under which virtual computersystems would be superior to comparable multiprogrammingsystems organized in the conventional manner.
For problems which are to be solved by digital computer simulation, an optimum solution is, in general, not obtained by analytic techniques, but rather by a search of the relevant parameter space. This search tends to...
详细信息
For problems which are to be solved by digital computer simulation, an optimum solution is, in general, not obtained by analytic techniques, but rather by a search of the relevant parameter space. This search tends to be overwhelming, especially in those cases where more than three of four parameters are involved. Because of this, an OPTIMIZER computer program has been developed to provide efficient semi-automatic procedures of searching for an optimum computer simulation solution. The development of the OPTIMIZER is described in this paper.
The HP 3000 is a 16-bit multiprogrammingcomputer. Multiprogramming is facilitated through the use of a virtual memory scheme using code and data segmentation. Separate code and data segmentation with segments of vari...
详细信息
The HP 3000 is a 16-bit multiprogrammingcomputer. Multiprogramming is facilitated through the use of a virtual memory scheme using code and data segmentation. Separate code and data segmentation with segments of variable length is the heart of the hardware and software system. A program consists of one or more code segments and a data segment. The data segment, also known as the stack, is used for a program's global and temporary storage. It also contains a stack used for operations and procedure return addresses.
This article develops the theory of the statistical dynamics of a fixed degree of multiprogramming Markov process model. The model is a generalization of Buzen's central server model and permits the inclusion of s...
详细信息
This article develops the theory of the statistical dynamics of a fixed degree of multiprogramming Markov process model. The model is a generalization of Buzen's central server model and permits the inclusion of such features as multiple central processing units and direct access storage devices with rotational position sensing and sector queueing.
Several languages have been developed for or applied to the problem of describing digital hardware systems. This paper points out some of the problems encountered in hardware descriptions, particularly where they are ...
详细信息
This article examines implications of coverage on the performance measurements of self-repairing computers. An extension is made to the Mathur Reliability Model which results in an alternative formulation of coverage....
详细信息
This article examines implications of coverage on the performance measurements of self-repairing computers. An extension is made to the Mathur Reliability Model which results in an alternative formulation of coverage. This formulation allows separate recovery probabilities to be assigned to processors which fail during active operation, and processors which fail during the dormant (spare) mode. A concise APL program based on this formulation is presented which is used for reliability modeling of Hybrid redundant configurations.
This article describes a simulator for Register Transfer Modules (RTM's). The simulator operates at the register transfer level. RTM systems are specified to the simulator with a language which was designed to all...
详细信息
This article describes a simulator for Register Transfer Modules (RTM's). The simulator operates at the register transfer level. RTM systems are specified to the simulator with a language which was designed to allow simple translation from an RTM flow chart.
A multiprogramming model is presented for a general purpose time sharing computer system, where the arrival and the departure processes of the programs along with the main system resources, i. e. , the CPU's, the ...
详细信息
A multiprogramming model is presented for a general purpose time sharing computer system, where the arrival and the departure processes of the programs along with the main system resources, i. e. , the CPU's, the different kind of IOP's and the finite main memory size, are included and their relationships are examined.
The paper presents a method for predicting the paging rate of a virtual memory multiprogramming system, given the set of programs to be run together, and the size of available main storage. Predictions compare favorab...
详细信息
The paper presents a method for predicting the paging rate of a virtual memory multiprogramming system, given the set of programs to be run together, and the size of available main storage. Predictions compare favorably with results from a CP-67 simulation.
In this paper the approach adopted for providing the software of a large real time system is described. The software project organization which resulted is then given. The project planning and progressing are describe...
详细信息
In this paper the approach adopted for providing the software of a large real time system is described. The software project organization which resulted is then given. The project planning and progressing are described. Finally observations on the software production, its rate, and the success of the storage and run time estimates are given.
暂无评论