Process Scheduling 

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Thank You. So process scheduling is ond of the important service of operating system. Job Queue contains all the process while ready Queue contains those that are ready for execution and waiting for CPU to be assigned. When a process is taken by processor and has started execution, it can either end, swap, or go to wait for I/O. Swapped processes and those waiting for I/O's have their own respective queues.

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Multiprogramming: multiple processes running at all time, to maximize CPU utilization Time sharing: switching CPU between processes happens so frequently that user can interact with programs while running A process scheduler will select an available process (from a list of ready processes) to be executed There are 2 queues: - Job queue: when a process enters the system, it will be pushed to this queue. So this queue represents all the processes of the system - Ready queue: all the processes waiting in the memory to be assigned a CPU to execute When a process is assigned a CPU, and then another higher priority process come, it will be swapped out, and pushed to the parially executed processes queue, and then swapped in back to the ready queue.

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All i can say is that process scheduling is about reasons that can make a process wait before and after interacting with the cpu until a process ends.A process can never be compared to a person waiting for his turn while buying something .

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The ready queue is a queue of all processes that are waiting to be scheduled on a core/CPU. The job queue is the list of processes that reside on mass storage/secondary storage and await main memory allocation.

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without captions i thought scheduling was shadowling But these lessons still save me a lot of time thanks @Neso Academy

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I have a question on last diagram. It seems like logical concept of cpu scheduling. Considering with computer architecture, Is it devided like this on hardware/or mainboard? If you say so, Where is the Ready queue?

Real time example is for more understanding.

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so what is different between time sahring and context switching you said that time sharing swtich the cpu among process but i searched and it was changing users not process context switch is what switch between process so can you explain because i'm confused

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for me it doesnot make any sense that Output process again enter in ready queue after competing it task. Should it go there just to let cpu Know that they are fisnish with their task🤔

okk, now i have a doubt as you told that in 5:36 the process scheduler schedule the process. Now in case of more than one processor you told that the rest will have to wait until the CPU is free and can be rescheduled. So why we have to wait if there are more processors? CPU might be able to process more than one process at a single time. The thing which you told must be applicable for single processor system. Isn't it?

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Present sir

Sir just we can go through your examples and explanation part

ı think in the job queue we are holdings programs, not processes.

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Examples where processor need I/o device's

More videos

This concept is similar to interrupt

Operating System Concept the books you use as a resource for preparation of this video

Who do this process scheduling

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Ready Queue same meaning with ready state right? 😅

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At 4 : 00 Second sentence also called as MULTITASKING. Am I correct ?

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The hardest part was to hear the presenter mispronounce the word "scheduling". My ears are hurting. Beyond that, the lectures are a gain to my understanding of how computers work.

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Scheduling queue 5:48

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Thanks sir