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Operating System Beginner


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Hi. I am learning the fundamentals of Operating Systems and we are learning bout SJF shortest job first, and Round robin and FCFS first come first server. Well my question is, an optimal algorithm have a lower mean turnaround time right??? I mean the lowest turnaround time is the best result? Anbydoy know what an interarrival time is?

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Lower turnaround time is best.

I have no idea what interarrival time is. Arrival time is when a process arrives in the queue. Don't know if it's what you're looking for, though.

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maybe this is off-topic: its been that kind of day.

I start college next month. MAJOR: Computer Science. I hope to write operating system code someday. Any ideas. I mean philosophicially. Or fundamentally. Not Feature wise. I think im going Open Source? how bout it.

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Interarrival time is the (average) time between events. I guess you're learning about schedulers, right?

@jkinzer: You probably didn't learn what interarrival time was because it is more commonly associated with event driven simulations and not OSes

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PI IS EXACTLY 3!!!

Now that I have your attention, I should really say something worthwhile.

"Rea{Buffering...}" - darksoul

"...your post made about as much sense as a condom machine in the vatican" - =NickJ=

"If you want to find someone who can't add, subtract, multiply, or divide, go find someone who is really good at high level mathematics."

"People are a lot happier when you give them 8 shots an hour of morphine"

"You can't lie to Java. If you lie to Java, all of a sudden it will scream and explode."

"In high school kids like to look up 'sex' in the dictionary, and then they say 'Oh my God, I can't believe they put that in the dictionary!'"

nice sig.. I like the attention getter. But the real question is what if pi really did equal three and the universe was lying to the conscious minds of scientists and mathematicians around the world? A thought provoking question, no?

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I start college next month. MAJOR: Computer Science. I hope to write operating system code someday. Any ideas. I mean philosophicially. Or fundamentally. Not Feature wise. I think im going Open Source? how bout it.

Open source is the only way to go if you want it to be usable. writing an OS covers a TON of different aspects of programming, and you will need a lot of help. Just take a minute to think of all the different aspects of an OS you have to write:

Scheduler

Memory management

Device drivers (ugh)

File management

The list continutes...

Since you are going to be a computer science major, you will learn quite a bit about these things (probably even looking at the linux source code), but writing these yourself from scratch is a monumental task.

I started writing an OS once, but gave up after a couple days :)

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Open source is the only way to go if you want it to be usable. writing an OS covers a TON of different aspects of programming, and you will need a lot of help. Just take a minute to think of all the different aspects of an OS you have to write:

Scheduler

Memory management

Device drivers (ugh)

File management

The list continutes...

Since you are going to be a computer science major, you will learn quite a bit about these things (probably even looking at the linux source code), but writing these yourself from scratch is a monumental task.

I started writing an OS once, but gave up after a couple days :)

Even though Windows CE is mainly seen as an OS for mobile devices, microsoft has deals with several universities to allow the students too look at this source code.

just thought i could add this to the discussion.

STV

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