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lrtf.html
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<!DOCTYPE html>
<html>
<head>
<title>
Largest Remaining Time First Scheduling
</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Lato">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
</head>
<nav class="navbar navbar-inverse navbar-fixed-top">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" href="../index.html">OS simulator</a>
</div>
<ul class="nav navbar-nav">
<li class="active"><a href="index.html">Home</a></li>
<li class="active"><a href="wiki.html">Wiki</a></li>
</ul>
</div>
</nav>
<br><br><br>
<script>
/*FCFS SCHEDULING*/
var sequence;
var complete;
var time;
var i;
var total;
var proc;
var n;
var at=[];
var bt=[];
var stuff=[];
var index=1;
var average_wt;
var average_tat;
var throughput;
var cpu_efficiency;
$(document).ready(function(){
$('#add').click(function(){
AddtoList();
})
function DisplayList(){
var table = document.getElementById("ept");
console.log(stuff[stuff.length-1].no);
$('#ept').append("<tr><td>"+stuff[stuff.length-1].no+"</td><td>"+stuff[stuff.length-1].at+"</td><td>"+stuff[stuff.length-1].bt1+"</td></tr>");
}
function AddtoList(){
var arrivalTime=parseInt(document.getElementById("at1").value);
var burstTime=parseInt(document.getElementById("bt1").value);
var ioTime=parseInt(document.getElementById("io").value);
var FinalburstTime=parseInt(document.getElementById("bt2").value);
console.log(arrivalTime);
console.log(burstTime);
var rtj=[];
rtj.push(burstTime);
rtj.push(ioTime);
rtj.push(FinalburstTime);
console.log(rtj);
stuff.push({
"at":arrivalTime,
"bt1":burstTime,
"io": ioTime,
"bt2" : FinalburstTime,
"check" : parseInt("0"),
"finish" : parseInt("0"),
"no":index,
"rt":rtj,
"point" : parseInt("0"),
"wt": parseInt("0"),
"tat":parseInt("0")
});
index=index+1;
console.log(stuff);
document.getElementById("at1").value="";
document.getElementById("bt1").value="";
document.getElementById("io").value="0";
document.getElementById("bt2").value="0";
DisplayList();
};
$('#start').click(function(){
lrtf();
var i = 0;
console.log(total);
console.log(sequence[total].start);
var totalTime = sequence[total].start;
pixel = parseInt(600/totalTime);
console.log("%d---%d\n",totalTime,pixel);
var containerWidth = pixel*totalTime + 2;
console.log("containerWidth is %d",containerWidth);
$('#outer-div').css('width',containerWidth+'px');
displayBlock(i);
})
function lrtf(){
var proc=[];
for(i=0;i<stuff.length;i++){
proc.push(i+1);
}
var n=stuff.length;
for(i=0;i<n;i++){
for(j=i+1;j<n;j++){
if(stuff[i].at>stuff[j].at)
{
var temp;
temp=stuff[i];
stuff[i]=stuff[j];
stuff[j]=temp;
temp=proc[i];
proc[i]=proc[j];
proc[j]=temp;
}
}
}
console.log(stuff);
var time=0;
var complete=0;
var temp=-1000;
var st_time;
sequence=[];
while(complete!=n)
{
var min=0;
var minindex=100;
for(i=0;i<n;i++){
if(stuff[i].at<=time && stuff[i].finish==0 && (stuff[i].point==0 || stuff[i].point==2) && stuff[i].check==0 && stuff[i].rt[stuff[i].point]>min){
min=stuff[i].rt[stuff[i].point];
minindex=i;
}
}
console.log(minindex);
if(minindex<stuff.length){
if(temp!=minindex){
st_time=time;
}
stuff[minindex].rt[stuff[minindex].point]=stuff[minindex].rt[stuff[minindex].point]-1;
time=time+1;
console.log(time);
console.log(minindex);
if(temp!=minindex){
sequence.push({start:st_time,n:stuff[minindex].no});
}
for(i=0;i<stuff.length;i++){
if(stuff[i].check==1){
stuff[i].rt[stuff[i].point]--;
if(stuff[i].rt[stuff[i].point]==0)
{
stuff[i].check=0;
stuff[i].point++;
}
}
}
if(stuff[minindex].rt[stuff[minindex].point]==0){
if(stuff[minindex].point==0){
if(stuff[minindex].rt[1]==0 && stuff[minindex].rt[2]==0)
{
complete++;
stuff[minindex].finish=1;
stuff[minindex].tat=time-stuff[minindex].at;
stuff[minindex].wt=stuff[minindex].tat-stuff[minindex].bt1-stuff[minindex].bt2;
}
stuff[minindex].check=1;
stuff[minindex].point=1;
}
if(stuff[minindex].point==2){
console.log(minindex);
complete=complete+1;
stuff[minindex].tat=time-stuff[minindex].at;
stuff[minindex].wt=stuff[minindex].tat-stuff[minindex].bt1-stuff[minindex].bt2;
stuff[minindex].finish=1;
console.log(stuff);
}
}
temp=minindex;
}
if(min==0 && minindex==100){
console.log(time);
var temp1=null;
if(temp!=temp1)
st_time=time;
time=time+1;
if(temp!=temp1){
sequence.push({start:st_time,n:null});
}
for(i=0;i<stuff.length;i++){
if(stuff[i].check==1){
stuff[i].rt[stuff[i].point]--;
if(stuff[i].rt[stuff[i].point]==0)
{
stuff[i].check=0;
stuff[i].point=2;
}
}
}
temp=null;
console.log(time);
}
}
sequence.push({start:time,n:-1});
console.log(sequence);
total = sequence.length-1;
console.log(total);
var sum_at=0;
for(i=0;i<n;i++)
sum_at+=stuff[i].wt;
average_wt=sum_at/n;
var sum_tat=0;
for(i=0;i<n;i++)
sum_tat+=stuff[i].tat;
average_tat=sum_tat/n;
var pixel = 0;
var sum_null=0;
throughput=n/time;
for(i=0;i<sequence.length;i++)
{
if(sequence[i].n==null)
{
sum_null+=sequence[i+1].start-sequence[i].start;
}
}
cpu_efficiency=((time-sum_null)/time)*100;
}
function drawTable(i){
if(i<stuff.length){
var table = document.getElementById("ptable");
console.log(stuff[i].wt);
$("#ptable").append("<tr><td>"+stuff[i].no+"</td><td>"+stuff[i].at+"</td><td>"+stuff[i].bt1+"</td><td>"+stuff[i].wt+"</td><td>"+stuff[i].tat+"</td></tr>");
drawTable(i+1);
}
else
{
$("#Average").append("<b>The average waiting time of the given processes is "+average_wt+"</b><br>");
$("#Average").append("<b>The average turn around time of the given processes is "+average_tat+"</b><br>");
$("#Average").append("<b>The throughput of the given processes is "+throughput+"</b><br>");
$("#Average").append("<b>The CPU efficiency is "+cpu_efficiency+"%</b><br>");
}
}
function displayBlock(i){
if(i == total){
document.getElementById("ptab").style.display='block';
drawTable(0);
return;
}
var blockWidth = (sequence[i+1].start - sequence[i].start)*pixel;
var processName = sequence[i].n;
if(sequence[i].n==null)
{
$('#outer-div').append('<div class="block" id="process-'+sequence[i].start +'">CPU Idle<div class="bottom">'+ sequence[i+1].start +'</div></div>');
}
else
{
$('#outer-div').append('<div class="block" id="process-'+sequence[i].start +'">P-'+ sequence[i].n +'<div class="bottom">'+ sequence[i+1].start +'</div></div>');
}
$('#process-'+sequence[i].start).css('width',blockWidth);
$('#process-'+sequence[i].start).fadeIn('slow',function(){
displayBlock(i+1);
});
}
});
</script>
<style>
body{
text-align: center;background-color: rgb(220,220,220);
}
th {
background-color:rgb(50,50,50);color: white;
}
#b{
font-size:2 em;
}
h1{
font-style: italic;
}
.btn{
border-radius:12px;background-color:rgb(150,150,150);color:white;
}
p{
font-size: 3 em;
font-style: italic;
}
#ptab{
display:none;
}
#outer-div{
margin: auto;
width: 600px;
height: 100px;
position: relative;
border: 1px solid black;
}
.block{
position: relative;
display: none;
border-right: 1px solid black;
float: left;
text-align: center;
background-color: rgba(112, 128, 144, 0.44);
height: 98px;
}
.bottom{
/* position: absolute;*/
width: 100%;
margin-top: 100px;
text-align: right;
margin-bottom: 1;
}
</style>
<body>
<h1>
Largest Remaining Time First
</h1>
<br><br><br>
<div class="container">
<div class="container">
<div class="col-12 col-md-6">
<h3>Processes</h3>
<table id="ep" class="table table-bordered">
<thead>
<th>PNO.</th>
<th>Arrival Time </th>
<th>Burst Time 1 </th>
</thead>
<tbody id="ept">
</tbody>
</table>
<input type='number' min="0" id='at1' placeholder="arrival time"></input>
<input type='number' min="0" id='bt1' placeholder="burst time 1"></input>
<input type='hidden' min="0" id='io' value="0" placeholder="io time"></input>
<input type='hidden' min="0" id='bt2' value="0" placeholder="burst time 2"></input>
<button id="add" class="btn" onclick="AddtoList()">Add</button>
<br><br>
<button id="start" class="btn">Start</button>
</div>
<div class="col-12 col-md-6">
<h2>Gantt Chart</h2>
<div id="outer-div"></div>
</div>
</div>
<br><br><br>
<div class="container">
<div class="col-12 col-md-6">
<div class="panel-content">
<table id="ptab" class="table table-bordered" style="width :600px">
<thead>
<tr id="thead">
<th>PNO.</th>
<th>Arrival time</th>
<th>Burst time1</th>
<th>Waiting time</th>
<th>Turn Around Time</th>
</tr>
<tbody id="ptable">
</tbody>
</thead>
</table>
</div>
</div>
<div class="col-12 col-md-6" style="text-align: center;">
<p id="Average" align="center" style="background-color: rgb(150,150,150);"></p>
</div>
</div>
</div>
</body>
</html>