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shortest job first (preempitive)algorithm using java

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shortest job first (preempitive)algorithm using java

ahmadghost	2 Dec, 2006 - 03:28 AM Post #1
New D.I.C Head Joined: 25 Nov, 2006 Posts: 5 My Contributions	hiiiii every one ... is any one know how can i implement the algorithm of operating system ... ---shortest job first (preempitive)algorithm-- using java please i neeeeeeed your helppppp as sonne as posible
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msg555	RE: Shortest Job First (preempitive)algorithm Using Java 2 Dec, 2006 - 03:42 AM Post #2
D.I.C Head Joined: 4 May, 2006 Posts: 136 Thanked: 5 times Dream Kudos: 25 My Contributions	Could you explain a little more what this shortest job first algorithm is suppose to do?
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William_Wilson	RE: Shortest Job First (preempitive)algorithm Using Java 2 Dec, 2006 - 07:12 AM Post #3
lost in compilation Joined: 23 Dec, 2005 Posts: 4,101 Thanked: 25 times Dream Kudos: 3275 Expert In: Java, C, Javascript My Contributions	i think what ahmadghost is trying to do is read the length of an instruction and then instead of queueing them, to process them in an order based on that length. This is not how all OS process things, there are many other factors that determine run time, eg: estimated run time, length of wait, data collection, etc. Also with the use of pipelining in hardware quite often the length of the instruction is irrelevent, especially since the classic model right now is to use instructions of all the same length (easier to sinc to the processor pulse). The biggest questions are why, and how are the instructions received?
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msg555	RE: Shortest Job First (preempitive)algorithm Using Java 2 Dec, 2006 - 09:10 AM Post #4
D.I.C Head Joined: 4 May, 2006 Posts: 136 Thanked: 5 times Dream Kudos: 25 My Contributions	This looks like the job for a priority queue or min heap.
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ajwsurfer	RE: Shortest Job First (preempitive)algorithm Using Java 19 Mar, 2007 - 12:11 PM Post #5
D.I.C Regular Joined: 24 Oct, 2006 Posts: 298 Thanked: 2 times Dream Kudos: 50 My Contributions	Here is a form about this in C++. I have posted my thoughts about this there. http://dreamincode.net/forums/showtopic25158.htm
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