Improving TSS/360 performance by tuning the table-driven scheduler

During the period of time from August 1970 through January 1971 and while employing the TSS/360 Time-Sharing System at this institution, it was observed by the user community that the performance of the system was poor compared to the previously used time-sharing system - the CP/67 (version 3. from Cambridge Research Center). For this reason, the problem of improving TSS/360 performance was undertaken as a thesis project. Specifically, the improvements consist of an increase in system performance - responsiveness and throughput - by judiciously adjusting the parameters of the TSS/360 Table-driven Scheduler in accordance with the Principles of Balanced-Core Time and Working Set Size. A number of test runs were made, and the result are given, employing different schedule tables. A set of benchmark programs (or script) were developed and used with these tests that were characteristic of a "typical" or "realistic" load at this institution.http://www.archive.org/details/improvingtss360p00bairCaptain, United States Marine CorpsApproved for public release; distribution is unlimited

An Analysis for Evaluating the Cost/Profit Effectiveness of Parallel Systems

A new domain of commercial applications demands the development of inexpensive parallel computing platforms to lower the cost of operations and increase the business profit. The calculation of returns on an IT investment is now important to justify the decision of upgrading or replacing parallel systems. This thesis presents a framework of the performance and economic factors that are considered when evaluating a parallel system. We introduce a metric called the cost/profit effective metric, which measures the effectiveness of a parallel system in terms of performance, cost and profit. This metric describes the profit obtained from the performance of three different domains for scaling: speed-up, throughput and/or scale-up. Cost is measured by the actual costs of a parallel system. We present two cases of study to demonstrate the application of this metric and analyze the results to support the evaluation of the parallel system on each case

Évaluation, par simulation, des performances de serveurs de commerce électronique : étude de cas : le serveur GNP

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal

Benchmarked comparison of the TSS/360, CP/67, MTS and OS/MVT computer operating systems

A set of terminal scripts and benchmarks have been derived for comparing the performance of time sharing and batch computer operating systems. Some of the problems encountered in designing valid benchmarks for comparing computer operating systems under both terminal and batch loads are discussed. The results of comparing TSS/360, CP/67 and MTS time sharing systems for the IBM 360/67 over a wide range of load conditions are presented. The results of comparing TSS, MTS and OS/MVT under batch loads are also presented . Serious performance degradation of the time sharing computer systems from overloading was experienced and a simple solution is suggested to prevent such degradation. The degradation was so severe as to render the performance less than that of a sequential job processor system.supported by an NPS Foundation Granthttp://archive.org/details/benchmarkedcompa00symssupported by an NPS Foundation GrantN