A large-scale dual operating system

Job scheduling in multiprogrammed computer systems

“…By limiting the number of active jobs in this class, control can be exercised over the number of concurrently active time sharing tasks. 6 Although this work appears to deal with job selection in a 'typical' batch system, in fact it deals with job selection in any system with limited resources. For example, in a virtual memory system which supports multiprogramming, jobs typically move through the waiting, ready and active states as described above, and there is usually an equivalent of the virtual processor, which serves as an agent which controls one active job.…”

Feedback coupled resource allocation policies in the multiprogramming-multiprocessor computer system

“…The data for parameterization and validation for the models was gathered on CDC 6000 series computer systems driven by the UT-2D operating system [7] through the use of a system level trace package imbedded in the operating system [8]. This data is used in two fashions.…”

“…The more expensive TDM runs were used to assess the effects of more detailed and realistic representations of the workload on the model studies. The model systems were parameterized by and validated by data obtained from measurement of a CDC/6400 systems driven by the extensively instrumented UT-2D [7] operating system. It is shown that dynamic feedback scheduling gives improved performance over static scheduling, particularly under conditions of heavy I/O processing demands.…”

Gathering and analyzing data from a computer system

“…Many of the currently available systems have a data gathering f a c i l i t y as an integral part of the system [6]. For other systems, such f a c i l i t i e s have been added on [5]. While the literature has documented these f a c i l i t i e s , there has been l i t t l e published on the use of such tools in the design and evaluation of computer systems.…”