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srtf.html
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srtf.html
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<!-- <!DOCTYPE html>
<html>
<head>
<title>SRTF Scheduler</title>
<style>
body {
background-color: black;
color: #ffd700;
font-family: Arial, sans-serif;
}
.container {
max-width: 600px;
margin: 0 auto;
padding: 20px;
}
h1 {
text-align: center;
margin-bottom: 50px;
}
.processes {
margin-top: 40px;
}
.process {
display: flex;
align-items: center;
margin-bottom: 10px;
}
.process .pid {
background-color: #ffd700;
color: black;
border-radius: 3px;
padding: 5px 10px;
margin-right: 10px;
}
.process .burst-time, .process .arrival-time {
background-color: black;
color: #ffd700;
padding: 5px 10px;
margin-right: 10px;
}
.output {
margin-top: 40px;
text-align: center;
}
table {
margin-top: 20px;
width: 100%;
border-collapse: collapse;
}
th, td {
padding: 8px;
text-align: left;
border-bottom: 1px solid #ffd700;
}
th {
background-color: #ffd700;
color: black;
}
.gantt-chart {
margin-top: 40px;
display: flex;
align-items: center;
justify-content: center;
}
.process-bar {
height: 40px;
background-color: #ffd700;
display: flex;
align-items: center;
justify-content: center;
margin-right: 10px;
}
.btn{
width:150px;
height:40px;
background-color: #ffd700;
color:black;
border-radius: 10px;
margin-left:10px;
font-size: 16px;
}
input{
width:150px;
height:30px;
}
</style>
</head>
<body>
<div class="container">
<h1>SHORTEST REMAINING TIME FIRST</h1>
<label for="num-processes">Number of Processes:</label>
<input type="number" id="num-processes">
<button onclick="createTable()" class="btn">Create Table</button>
<div id="process-table"></div>
<div class="output">
<button onclick="runSRTF()" class="btn">Run SRTF</button>
<p id="result"></p>
</div>
<div class="gantt-chart" id="gantt-chart"></div>
</div>
<script>
function createTable() {
const numProcessesInput = document.getElementById('num-processes');
const numProcesses = parseInt(numProcessesInput.value);
if (isNaN(numProcesses) || numProcesses <= 0) {
alert('Please enter a valid number of processes.');
return;
}
let tableHtml = '<table>';
tableHtml += '<tr><th>PID</th><th>Arrival Time</th><th>Burst Time</th></tr>';
for (let i = 0; i < numProcesses; i++) {
tableHtml += `<tr><td>P${i + 1}</td><td><input type="number" class="arrival-time-input"></td><td><input type="number" class="burst-time-input"></td></tr>`;
}
tableHtml += '</table>';
const processTableDiv = document.getElementById('process-table');
processTableDiv.innerHTML = tableHtml;
}
function runSRTF() {
const arrivalTimeInputs = document.getElementsByClassName('arrival-time-input');
const burstTimeInputs = document.getElementsByClassName('burst-time-input');
const processes = [];
for (let i = 0; i < arrivalTimeInputs.length; i++) {
const arrivalTime = parseInt(arrivalTimeInputs[i].value);
const burstTime = parseInt(burstTimeInputs[i].value);
if (isNaN(arrivalTime) || isNaN(burstTime) || arrivalTime < 0 || burstTime <= 0) {
alert('Please enter valid arrival and burst times for all processes.');
return;
}
processes.push({ pid: `P${i + 1}`, arrivalTime, burstTime, remainingTime: burstTime });
}
let currentTime = 0;
let completedProcesses = 0;
let totalWaitingTime = 0;
let totalTurnaroundTime = 0;
while (completedProcesses < processes.length) {
let shortestIndex = -1;
let shortestTime = Infinity;
for (let i = 0; i < processes.length; i++) {
const process = processes[i];
if (process.arrivalTime <= currentTime && process.remainingTime < shortestTime && process.remainingTime > 0) {
shortestIndex = i;
shortestTime = process.remainingTime;
}
}
if (shortestIndex === -1) {
currentTime++;
continue;
}
const shortestProcess = processes[shortestIndex];
shortestProcess.remainingTime--;
currentTime++;
if (shortestProcess.remainingTime === 0) {
completedProcesses++;
shortestProcess.completionTime = currentTime;
shortestProcess.turnaroundTime = shortestProcess.completionTime - shortestProcess.arrivalTime;
shortestProcess.waitingTime = shortestProcess.turnaroundTime - shortestProcess.burstTime;
totalWaitingTime += shortestProcess.waitingTime;
totalTurnaroundTime += shortestProcess.turnaroundTime;
}
}
const averageWaitingTime = totalWaitingTime / processes.length;
const averageTurnaroundTime = totalTurnaroundTime / processes.length;
const resultElement = document.getElementById('result');
resultElement.innerHTML = `Average Waiting Time: ${averageWaitingTime.toFixed(2)}<br>Average Turnaround Time: ${averageTurnaroundTime.toFixed(2)}`;
generateGanttChart(processes);
}
function generateGanttChart(processes) {
const ganttChartDiv = document.getElementById('gantt-chart');
let ganttChartHtml = 'Gantt Chart: ';
for (let i = 0; i < processes.length; i++) {
const process = processes[i];
ganttChartHtml += `<div class="process-bar" style="width: ${process.burstTime * 20}px; color:black;">${process.pid}</div>`;
}
ganttChartDiv.innerHTML = ganttChartHtml;
}
</script>
</body>
</html> -->
<!DOCTYPE html>
<html>
<head>
<title>Shortest Remaining Time First Scheduler</title>
<style>
body {
background-color: black;
color: goldenrod;
font-family: Arial, sans-serif;
}
.container {
max-width: 600px;
margin: 0 auto;
padding: 20px;
}
h1 {
text-align: center;
}
.processes {
margin-top: 40px;
}
.process {
display: flex;
align-items: center;
margin-bottom: 10px;
}
.process .pid {
background-color: goldenrod;
color: black;
border-radius: 3px;
padding: 5px 10px;
margin-right: 10px;
}
.process .burst-time, .process .arrival-time {
background-color: black;
color: goldenrod;
padding: 5px 10px;
margin-right: 10px;
}
.output {
margin-top: 40px;
text-align: center;
}
table {
margin-top: 20px;
width: 100%;
border-collapse: collapse;
}
th, td {
padding: 8px;
text-align: left;
border-bottom: 1px solid goldenrod;
}
th {
background-color: goldenrod;
color: black;
}
.gantt-chart {
margin-top: 40px;
display: flex;
align-items: center;
justify-content: center;
}
.process-bar {
height: 40px;
background-color: goldenrod;
display: flex;
align-items: center;
justify-content: center;
margin-right: 10px;
}
.btn{
width:150px;
height:40px;
background-color: #ffd700;
color:black;
border-radius: 10px;
margin-left:10px;
font-size: 16px;
}
input{
width:150px;
height:30px;
}
</style>
</head>
<body>
<div class="container">
<h1>Shortest Remaining Time First</h1>
<label for="num-processes">Number of Processes:</label>
<input type="number" id="num-processes">
<button onclick="createTable()" class="btn">Create Table</button>
<div id="process-table"></div>
<div class="output">
<button onclick="runSRTF()" class="btn">Run SRTF</button>
<p id="result"></p>
</div>
<div class="gantt-chart" id="gantt-chart"></div>
</div>
<script>
function createTable() {
const numProcessesInput = document.getElementById('num-processes');
const numProcesses = parseInt(numProcessesInput.value);
if (isNaN(numProcesses) || numProcesses <= 0) {
alert('Please enter a valid number of processes.');
return;
}
let tableHtml = '<table>';
tableHtml += '<tr><th>PID</th><th>Arrival Time</th><th>Burst Time</th></tr>';
for (let i = 0; i < numProcesses; i++) {
tableHtml += `<tr><td>P${i + 1}</td><td><input type="number" class="arrival-time-input"></td><td><input type="number" class="burst-time-input"></td></tr>`;
}
tableHtml += '</table>';
const processTableDiv = document.getElementById('process-table');
processTableDiv.innerHTML = tableHtml;
}
function runSRTF() {
const arrivalTimeInputs = document.getElementsByClassName('arrival-time-input');
const burstTimeInputs = document.getElementsByClassName('burst-time-input');
const arrivalTimes = [];
const burstTimes = [];
for (let i = 0; i < arrivalTimeInputs.length; i++) {
const arrivalTime = parseInt(arrivalTimeInputs[i].value);
const burstTime = parseInt(burstTimeInputs[i].value);
if (isNaN(arrivalTime) || isNaN(burstTime) || arrivalTime < 0 || burstTime <= 0) {
alert('Please enter valid arrival time and burst time for all processes.');
return;
}
arrivalTimes.push(arrivalTime);
burstTimes.push(burstTime);
}
const processes = [];
for (let i = 0; i < arrivalTimes.length; i++) {
processes.push({ pid: `P${i + 1}`, arrivalTime: arrivalTimes[i], burstTime: burstTimes[i], remainingTime: burstTimes[i] });
}
let currentTime = 0;
let completedProcesses = 0;
let totalWaitingTime = 0;
let totalTurnaroundTime = 0;
const ganttChartDiv = document.getElementById('gantt-chart');
let ganttChartHtml = 'Gantt<br>Chart: ';
while (completedProcesses < processes.length) {
let shortestIndex = -1;
let shortestTime = Infinity;
for (let i = 0; i < processes.length; i++) {
const process = processes[i];
if (process.arrivalTime <= currentTime && process.remainingTime < shortestTime && process.remainingTime > 0) {
shortestIndex = i;
shortestTime = process.remainingTime;
}
}
if (shortestIndex === -1) {
currentTime++;
continue;
}
const shortestProcess = processes[shortestIndex];
shortestProcess.remainingTime--;
currentTime++;
ganttChartHtml += `<div class="process-bar" style="width: 40px; color:black;">${shortestProcess.pid}</div>`;
if (shortestProcess.remainingTime === 0) {
completedProcesses++;
const turnaroundTime = currentTime - shortestProcess.arrivalTime;
const waitingTime = turnaroundTime - shortestProcess.burstTime;
totalWaitingTime += waitingTime;
totalTurnaroundTime += turnaroundTime;
}
}
const averageWaitingTime = totalWaitingTime / processes.length;
const averageTurnaroundTime = totalTurnaroundTime / processes.length;
const resultElement = document.getElementById('result');
resultElement.innerHTML = `Average Waiting Time: ${averageWaitingTime.toFixed(2)}<br>Average Turnaround Time: ${averageTurnaroundTime.toFixed(2)}`;
ganttChartDiv.innerHTML = ganttChartHtml;
}
</script>
</body>
</html>