Job scheduling

Work-conserving scheduler

In computing and communication systems, a work-conserving scheduler is a scheduler that always tries to keep the scheduled resource(s) busy, if there are submitted jobs ready to be scheduled. In contrast, a non-work conserving scheduler is a scheduler that, in some cases, may leave the scheduled resource(s) idle despite the presence of jobs ready to be scheduled. For example, when dealing with networking and packet scheduling, a work-conserving scheduler leaves the channel idle only when there are no packets to transmit, whereas a non-work conserving scheduler might leave the channel idle with packets still pending transmission. Similarly, when referring to CPU scheduling, i.e. threads or processes scheduled over one or more available processors or cores, a work-conserving scheduler ensures that processors/cores are not idle if there are processes/threads ready for execution. Non-work conserving schedulers are sometimes useful to enhance predictability and reduce termination jitter for the activities carried out by a computing and communication system. In multi-processor systems they're useful to enhance performance in some scenarios.Sometimes, a non-work conserving scheduler may be useful to enhance stability of a system; For example, a process scheduler may choose to keep processes off of the run queue if there were concern that the sum of the working sets of all of the runnable processes would exceed available memory and lead to non-linear page thrashing overhead. Limiting the run queue in this manner might lead to under-utilization of available processors (and hence be non-work conserving) with the goal of avoiding situations where the system is unusable due to thrashing. (Wikipedia).

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Introduction to Scheduling

This lesson introduces the topic of scheduling and define basic scheduling vocabulary. Site: http://mathispower4u.com

From playlist Scheduling

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Time Management Tutorial - Tips on scheduling meetings

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From playlist Time Management

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Scheduling: The List Processing Algorithm Part 1

This lesson explains and provides an example of the list processing algorithm to make a schedule given a priority list. Site: http://mathispower4u.com

From playlist Scheduling

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Notifications & Reminders in Google Calendar

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From playlist How to Get the Most Out of Your Calendar

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Process Scheduling

An animation showing the main features of a process scheduling system including the ready queue, blocked queue, high level scheduler and low level scheduler. It explains the principle of a round robin scheduling algorithm.

From playlist Operating Systems

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From playlist Career

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Recorded July 19th, 2018 Milind Tambe is Helen N. and Emmett H. Jones Professor in Engineering and a Professor of Computer Science and Industrial and Systems Engineering at the University of Southern California, Los Angeles.

From playlist AI talks

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Scheduling: The Decreasing Time Algorithm

This lesson explains how to use the decreasing time algorithm to create a priority list and then a schedule. Site: http://mathispower4u.com

From playlist Scheduling

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From playlist Workshop: Mathematics of Collective Intelligence - Feb. 15 - 19, 2022.

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From playlist Job Success

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This lesson explains and provides an example of the list processing algorithm to create a digraph and make a schedule. Site: http://mathispower4u.com

From playlist Scheduling

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From playlist A Communion Of Subjects: Law, Environment, and Religion

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What is Job Scheduling | Error Hamdling Concept | Data Warehousing Tutorial | Edureka

***** Data Warehousing & BI Training: https://www.edureka.co/data-warehousing-and-bi ***** The allocation of system resources to various tasks, known as job scheduling, is a major assignment of the operating system. The system maintains prioritized queues of jobs waiting for CPU time and

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Related pages

Idle (CPU) | Network scheduler | Scheduling (computing) | Network packet