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Software Design Considerations for Real-Time DSP Systems
Published in Gillian M. Davis, Noise Reduction in Speech Applications, 2018
Preemptive multitasking is a condition in which an operating system uses some criteria to decide how long to allocate to any one task before giving another task a turn to use the operating system. The act of taking control of the operating system from one task and giving it to another task is called preempting. A common criterion for preempting is simply elapsed time (this kind of system is sometimes called time sharing or time slicing). In some OSs, some applications are given higher priority than other applications, giving the higher priority programs control as soon as they are initiated and perhaps longer time slices.
Event-Driven Programming
Published in Julio Sanchez, Maria P. Canton, Software Solutions for Engineers and Scientists, 2018
Julio Sanchez, Maria P. Canton
The conceptual model for a Windows program is quite different. In this case, the code has no direct access to devices and resources and must share the machine with other applications and with the operating system itself. The current versions of Windows implement preemptive multitasking. This means that the operating system can switch the foreground (CPU access) from one application to another. If an application misbehaves, Windows can simply turn it off. Therefore, it is the operating system that is “the god of the machine,” not the running program.
A countless variant simulation-based toolkit for remote learning and evaluation
Published in Cogent Engineering, 2023
Felipe Romero, Gerardo Bandera, Javier Romero, Luis F. Romero
Module 5: Input/Output and Operating Systems: a) Preemptive multitasking and time quanta: A microscopic view of how the operating system deals with multitasking using time slicing. Any process can be blocked due to interrupts (Figure 2). b) Interruptions and Daisy Chain: Three devices can set external interrupts, which may be masked individually or globally. The acknowledged response to interruptions is managed by a daisy–chain module.c) Wator: A population dynamics simulation of a toroidal ocean, using multi–threading and high-intensive CPU usage, combined with the process explorer of the system to teach preemption and multitasking.