CPU Scheduling: SRRN and Priority Based Algorithms | L 8 | Operating System | GATE 2022

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Really enjoying your sessons sir, i can say that you are a magician who is converting difficult topics into easy ones & which is helping me to build the concepts.

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Start 8:20

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8/5 = 1.6 hota hai sir, sayad galti se 1.3 likh dia hai apne, u r really a excellent teacher, every conceptions are getting clear so easily

[@vaibhavmetange6875]

Homework Question
Using preemptive :
Avg TAT=13.5
Avg WT= 9
Using Non preemptive:
Avg TAT= 14.16
Avg WT= 9.66

[@nayna28doifode13]

I got 13 and 8.5 @vaibhav metange

[@pd5873]

@@nayna28doifode13 cross-check ur calculation

[@PENJENDRUVARUN-uy2ov]

00:55 Discussing CPU Scheduling algorithms
07:05 SJF (Shortest Job First) algorithm prioritizes shorter burst time
15:02 The highest response ratio process is executed first.
22:28 The main algorithm used is Shortest Job First (SJF) to schedule processes.
29:58 Priority based scheduling allows the operating system to decide the priority of each process.
36:31 Preemptive Scheduling
45:09 Preemptive priority scheduling algorithm.
52:13 Non-preemptive priority-based scheduling suffers from starvation
1:01:34 Tomorrow's quiz on operating system and tree data structure

[@aaryanapte]

You really help us understand these concepts well... Hats off to your efforts!

[@nirajbava799]

Sir I really enjoy your lecture I'm diploma in computer engineering student from Maharashtra. Your teaching style is very interesting. Thanks you for creating those lectures they are also help me to prepare for my semester exams. One's again thanks you sir.

[@jiwnaniakshay8774]

Answer of hw question:
From Preemptive:-
Avg TAT= 13.5
Avg WT= 9
Using non preeemptive:-
Avg TAT= 14.16
Avg WT= 9.66

[@Kris_misra]

Bro I also got this.

[@Aryan-st7ze]

For preemptive its avg tat=12
Avg wt=7.5
Right??

[@alucard8678]

I am getting 13 as Avg TAT for Preemptive and 9 as Avg WT. Never mind, it is 13.5, just made a minor addition mistake.

[@soumyadeepbarik5711]

Sir P-3 arrives on time quantum 3not 2 so in 2to 3 TRANSITION there be P-2 instead of P-3.

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awesome vedio!

[@RandomMan271]

lecture start at 8:21

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Sir such a great lecture thank you so much for this lecture❤

[@muskansharma4991]

Thanks 😊

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your clg?

[@ramkumarramkumar-du5il]

superb🙂

[@Kris_misra]

Sir why we need to use priority based scheduling? Do HRRN scheduling also have limitations?

[@nikhilmahato7606]

Limitation is prediction of burst time, sir mentioned. Now you might get confusion like Priority algo also taking BT (in question). Actually it is just assumption, but selection of process doesn't depend of BT it only depends on priority. (( I know the person asked this question might got this answer long back, but may help someone else))

[@h6_wingers]

thank you very much sir, really really helpful

[@suhaniverma27]

Sir, how many processes are the in ready queue .How can we know?

[@soumyadeepbarik5711]

38:50-39:01 sirji ice-cream meetha hi hota hai.

[@sumitrajsingh938]

Sir why you consider Arrival time during SJF ganttt chart ,

[@neha_coding5563]

If a process is not arrived ,how will the CPU schedule?? for eg., if P1 arrives at t=0,then only this can be scheduled as no other process is available at that moment. Moreover,when another processes arrive during execution of P1,then we can go for different scheduling algorithms.

[@sumitrajsingh938]

@@neha_coding5563 thnks for clearing my doubt

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8:20

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Thank u sir..................

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Thora sa comedy kerne se mujhe nehi lagta ki kisika kuch problem hota he. Or agar tum seriouse sa face banake parhoge to stress jyada hoga or kuch kuch bhulte rhoge

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8:22

[@vishalsharma8194]

Start 8:20