Tailor is an atomic model of the Tandem/16 multiple-computer system. Atomic modeling is based on operational analysis and general considerations from queueing theory. Measurements of system atoms define the underlying components of processor usage. The ...

Most computer systems have separate central (CPU) and input-output (IOP) processors to permit simultaneous computation and input-output (I/O). It is conventional in such systems to avoid any loss of I/O data by granting the IOP priority over the CPU for ...

Performance analysis has always been considered important in computer design work. The area of central processing unit (CPU) design is no exception, where the successful development of performance evaluation tools provides valuable information in the ...

A distributed system of cooperating minicomputers is simulated by AIMER (Automatic Integration of Multiple Element Radars) to model and analyze the behavior of a radar tracking system. Simulation is applied in the AIMER project in an attempt to model a ...

This paper describes a recent experience in benchmarking, tuning and modelling Digital Equipment Corporation's VMS executive running on their VAX-11/780 computer. Although we emphasize modelling here, the three aspects are closely interrelated.

Although a large amount of theoretical work has been performed in the analysis of the pure working set replacement algorithm, little has been done applying these results to the approximations that have been implemented. This paper presents a general ...

A simulation model is developed and used to study the effect of buffering of memory requests on the performance of multiprocessor systems.

A multiprocessor system is generalized as a parallel-pipelined processor of order (s,p), which consists of p ...

In a multi-computer environment where several computers share packs of disk drives, the architecture of the disk controller can have significant effect on the throughput of the disk pack. In a simple configuration a controller can allow access to only ...

In this paper we present a convolution algorithm for the full class of closed, separable queueing networks. In particular, the algorithm represents an alternative method to those already known for the solution of networks with class changes, and is the ...

A number of case studies involving the use of queueing network models to investigate actual computer systems are surveyed. After suggesting a framework by which case studies can be classified, we contrast various parameter estimation methods for ...

Dataflow languages and processors are currently being extensively studied because of their respective ability to specify and execute programs which exhibit a high degree of parallel and/or asynchronous activity [12, 7]. This paper describes a ...

Dataflow languages and processors are currently being extensively studied because they provide for the specification and realization of processes exhibiting a high degree of parallel and/or asynchronous activity [12, 8]. Several researchers have ...

An approach to the implementation and simulation of system software for multicomputer architectures is described. OASIS, a variant of the SIMULA 67 language, provides tools for both hardware modelling and system software development. The latter includes ...

A technique for simulating incomplete systems is given which allows performance prediction during system design. This technique, called integrated simulation, allows the system design to itself be a simulation model, thus avoiding the overhead of ...

The supported methodology evolving in the SARA (System ARchitects' Apprentice) system creates a design frame-work on which increasingly powerful analytical tools are to be grafted. Control flow analyses and program verification tools have shown promise. ...

This paper is concerned with the data flow organization of computers and programs, which exhibits a good deal of inherent concurrencies in a computation by imposing no superfluous precedence constraints. In view of the popularity of parallel and ...

The problem of designing a properly functioning parallel hardware or software system is considerably more difficult than that of designing a similar sequential system. In this paper we formulate criteria which a design methodology for parallel systems ...

This paper concerns the performance evaluation of an operating system based on communicating processes. Processes communicate via messages and there is no shared data.

Execution of a program is abstracted as a sequence of events to denote significant ...

The author has recently developed a new methodology of benchmarking, which is being applied to a procurement in which (a) a single integrated interactive application is to span a distributed configuration of computing hardware, (b) the configuration is ...

Computer evaluation, comparison, and selection is essentially a decision process. The decision making is based on a number of worth indicators, including various computer performance indicators. The performance indicators are obtained through the ...

This paper presents results from the performance simulation study of a small business-oriented computer system. The system, SPERRY UNIVAC BC/7-700, is commercially available in the configuration modeled and in other higher performance models. All BC/7 ...

The complexities of Retail Business Systems today require a thorough understanding of how functional requirements impact desired system performance. It is no longer feasible to discretely test and evaluate individual system components without ...

A series of field performance aids have been developed to assist IBM Systems Engineers evaluate the performance of System/3, System/34, and System/38 configurations. Use of those aids is appropriate at proposal time, for preinstallation design, for ...