Added all codes.
This commit is contained in:
@@ -0,0 +1,80 @@
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#include<iostream>
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using namespace std;
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struct fcfs
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{
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int burst, arrival, id, completion, waiting, turnaround, response;
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};
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fcfs meh[30];
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class FCFS
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{
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public:
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int n;
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void fcfsIn(){
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cout<<"\nEnter number of processes: ";
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cin>>n;
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for(int i = 0; i < n; i++){
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cout<<"\nEnter arrival time of P"<<i<<": ";
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cin>>meh[i].arrival;
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cout<<"\nEnter burst time of P"<<i<<": ";
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cin>>meh[i].burst;
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meh[i].id = i;
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}
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cout<<"\n | Arrival | Burst\n";
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for(int j = 0; j < n; j++) {
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cout<<"P"<<j<<"| "<<meh[j].arrival<<" | "<<meh[j].burst<<"\n";
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}
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}
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void process() {
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cout<<"\nSequence of processes is: ";
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int currentTime = 0;
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for(int i = 0; i < n; i++){
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if(currentTime < meh[i].arrival){
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while(currentTime < meh[i].arrival){
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cout<<" NULL ";
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currentTime++;
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}
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}
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meh[i].response = currentTime - meh[i].arrival;
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cout<<"P"<<meh[i].id<<" ";
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currentTime += meh[i].burst;
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meh[i].completion = currentTime;
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meh[i].turnaround = meh[i].completion - meh[i].arrival;
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meh[i].waiting = meh[i].turnaround - meh[i].burst;
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}
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}
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void displayMetrics()
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{
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double totalWaiting = 0, totalTurnaround = 0, totalCompletion = 0;
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cout<<"\n\n | Completion time | Waiting time | Turnaround time | Response time\n";
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for(int j = 0; j < n; j++) {
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totalWaiting += meh[j].waiting;
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totalTurnaround += meh[j].turnaround;
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totalCompletion += meh[j].completion;
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cout<<"P"<<j<<"| "<<meh[j].completion
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<<" | "<<meh[j].waiting
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<<" | "<<meh[j].turnaround
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<<" | "<<meh[j].response<<"\n";
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}
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cout<<"\nAverage completion time: "<<totalCompletion/n;
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cout<<"\nAverage waiting time: "<<totalWaiting/n;
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cout<<"\nAverage turnaround time: "<<totalTurnaround/n;
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}
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};
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int main()
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{
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FCFS obj;
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obj.fcfsIn();
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obj.process();
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obj.displayMetrics();
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return 0;
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}
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@@ -0,0 +1,100 @@
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#include<iostream>
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#include<limits.h> // for INT_MAX
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using namespace std;
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struct sjf {
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int burst, arrival, id, completion, waiting, turnaround, response, priority;
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bool active;
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};
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sjf meh[30];
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class lesgo {
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public:
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int n;
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void priorityIn() {
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cout << "\nEnter number of processes: ";
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cin >> n;
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for (int i = 1; i <= n; i++) {
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cout << "\nEnter arrival time of P" << i << ": ";
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cin >> meh[i].arrival;
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cout << "\nEnter burst time of P" << i << ": ";
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cin >> meh[i].burst;
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cout << "\nEnter priority of P" << i << ": ";
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cin >> meh[i].priority;
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meh[i].id = i;
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meh[i].active = false;
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}
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cout << "\n | Arrival | Burst | Priority\n";
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for (int j = 1; j <= n; j++) {
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cout << "P" << j << " | " << meh[j].arrival << " | " << meh[j].burst << " | " << meh[j].priority << "\n";
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}
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}
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void priorityProcess() {
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int k = 0; // Current time
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int completed = 0; // Number of completed processes
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while (completed < n) {
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int highestPriority = INT_MAX;
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int selectedProcess = -1;
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// Find the process with the highest priority (smallest priority number) that has arrived and is not completed
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for (int i = 1; i <= n; i++) {
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if (meh[i].arrival <= k && !meh[i].active && meh[i].priority < highestPriority) {
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highestPriority = meh[i].priority;
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selectedProcess = i;
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}
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}
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if (selectedProcess != -1) {
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// Mark the process as active
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meh[selectedProcess].active = true;
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// If the process is starting now, calculate response time
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if (meh[selectedProcess].response == 0) {
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meh[selectedProcess].response = k - meh[selectedProcess].arrival;
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}
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// Execute the process
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k += meh[selectedProcess].burst;
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meh[selectedProcess].completion = k;
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meh[selectedProcess].turnaround = meh[selectedProcess].completion - meh[selectedProcess].arrival;
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meh[selectedProcess].waiting = meh[selectedProcess].turnaround - meh[selectedProcess].burst;
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completed++;
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} else {
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// If no process is ready to run, just increment time
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k++;
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}
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}
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}
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void displayMetrics() {
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double totalWaiting = 0, totalTurnaround = 0, totalCompletion = 0;
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cout << "\n\n | Completion time | Waiting time | Turnaround time | Response time\n";
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for (int j = 1; j <= n; j++) {
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totalWaiting += meh[j].waiting;
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totalTurnaround += meh[j].turnaround;
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totalCompletion += meh[j].completion;
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cout << "P" << j << " | " << meh[j].completion
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<< " | " << meh[j].waiting
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<< " | " << meh[j].turnaround
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<< " | " << meh[j].response << "\n";
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}
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cout << "\nAverage completion time: " << totalCompletion / n;
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cout << "\nAverage waiting time: " << totalWaiting / n;
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cout << "\nAverage turnaround time: " << totalTurnaround / n;
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}
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};
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int main() {
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lesgo obj;
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obj.priorityIn();
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obj.priorityProcess();
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obj.displayMetrics();
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return 0;
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}
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@@ -0,0 +1,110 @@
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#include<iostream>
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#include<queue>
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using namespace std;
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struct Process{
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int id, burst, arrival, remaining, completion, waiting, turnaround, response;
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};
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Process processes[30];
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class RoundRobin{
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public:
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int n, timeQuantum;
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void input(){
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cout<<"\nEnter number of processes: ";
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cin>>n;
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for(int i = 0; i < n; i++){
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cout<<"\nEnter arrival time of P"<<i<<": ";
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cin>>processes[i].arrival;
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cout<<"Enter burst time of P"<<i<<": ";
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cin>>processes[i].burst;
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processes[i].id = i;
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processes[i].remaining = processes[i].burst;
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processes[i].response = -1;
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}
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cout<<"\nEnter time quantum: ";
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cin>>timeQuantum;
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}
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void process(){
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int currentTime = 0;
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queue<int> q;
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bool inQueue[30] = {false};
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int completedProcesses = 0;
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for(int i = 0; i < n; i++){
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if(processes[i].arrival <= currentTime){
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q.push(i);
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inQueue[i] = true;
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}
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}
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while(completedProcesses < n){
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if(q.empty()){
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currentTime++;
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for(int i = 0; i < n; i++){
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if(!inQueue[i] && processes[i].arrival <= currentTime){
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q.push(i);
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inQueue[i] = true;
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}
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}
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continue;
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}
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int idx = q.front();
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q.pop();
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if(processes[idx].response == -1){
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processes[idx].response = currentTime - processes[idx].arrival;
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}
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if(processes[idx].remaining <= timeQuantum){
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currentTime += processes[idx].remaining;
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processes[idx].remaining = 0;
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processes[idx].completion = currentTime;
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processes[idx].turnaround = processes[idx].completion - processes[idx].arrival;
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processes[idx].waiting = processes[idx].turnaround - processes[idx].burst;
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completedProcesses++;
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}else{
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currentTime += timeQuantum;
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processes[idx].remaining -= timeQuantum;
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}
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for(int i = 0; i < n; i++){
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if(!inQueue[i] && processes[i].arrival <= currentTime && processes[i].remaining > 0){
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q.push(i);
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inQueue[i] = true;
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}
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}
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if(processes[idx].remaining > 0){
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q.push(idx);
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}
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}
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}
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void displayMetrics(){
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double totalWaiting = 0, totalTurnaround = 0, totalCompletion = 0;
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cout<<"\n\n | Completion time | Waiting time | Turnaround time | Response time\n";
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for(int i = 0; i < n; i++){
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totalWaiting += processes[i].waiting;
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totalTurnaround += processes[i].turnaround;
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totalCompletion += processes[i].completion;
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cout<<"P"<< processes[i].id<<" | "<<processes[i].completion<<" | "<< processes[i].waiting<<" | "<<processes[i].turnaround<<" | "<<processes[i].response<<"\n";
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}
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cout<<"\nAverage completion time: "<<totalCompletion/n;
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cout<<"\nAverage waiting time: "<<totalWaiting/n;
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cout<<"\nAverage turnaround time: "<<totalTurnaround/n;
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}
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};
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int main(){
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RoundRobin rr;
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rr.input();
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rr.process();
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rr.displayMetrics();
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return 0;
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}
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@@ -0,0 +1,82 @@
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#include <iostream>
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using namespace std;
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struct sjf{
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int id, arr, bur, comp, turn, wait, orgBur;
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};
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sjf meh[30];
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class SJF{
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public:
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int n;
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void getIn()
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{
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cout<<"Enter number of processes: ";
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cin>>n;
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for(int i = 0; i < n; i++){
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cout<<"\nEnter arrival time for process "<<i<<": ";
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cin>>meh[i].arr;
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cout<<"Enter burst time for process "<<i<<": ";
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cin>>meh[i].bur;
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meh[i].orgBur = meh[i].bur;
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meh[i].id = i;
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}
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}
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void process()
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{
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int k = 0;
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int completed = 0;
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cout<<"\nSequence of processes is: ";
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while(completed < n){
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int burst = 999;
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int idd = -1;
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for(int i = 0; i < n; i++){
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if(meh[i].arr <= k && meh[i].bur > 0){
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if(meh[i].bur < burst){
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burst = meh[i].bur;
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idd = i;
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}
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}
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}
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if(idd != -1){
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cout<<"P"<<idd<<" ";
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k++;
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meh[idd].bur--;
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if(meh[idd].bur == 0){
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meh[idd].comp = k;
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meh[idd].turn = meh[idd].comp - meh[idd].arr;
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meh[idd].wait = meh[idd].turn - meh[idd].orgBur;
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completed++;
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}
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} else{
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k++;
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}
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}
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}
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void display()
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{
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double turn = 0, comp = 0, wait = 0;
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cout<<"\n Completed | Waiting | Turnaround |";
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for(int i = 0; i < n; i++){
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turn += meh[i].turn;
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wait += meh[i].wait;
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comp += meh[i].comp;
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cout<<"\nP"<<i<<"| "<<meh[i].comp<<" | "<<meh[i].wait<<" | "<<meh[i].turn;
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}
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cout<<"\n\nAvg completion time: "<<comp/n;
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cout<<"\nAvg turnaround time: "<<turn/n;
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cout<<"\nAvg waiting time: "<<wait/n;
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}
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};
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int main()
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{
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SJF ob;
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ob.getIn();
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ob.process();
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ob.display();
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return 0;
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}
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@@ -0,0 +1,70 @@
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// Assignment A4 - (MUTEX AND SEMAPHORE)
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#include <iostream>
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using namespace std;
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class Synchronization {
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int a[10]; // Increased buffer size to 10
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int mutex;
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int empty;
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int full;
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int in;
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int out;
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void wait(int &x) {
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if (x > 0) x--;
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}
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void signal(int &x) {
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x++;
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}
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public:
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Synchronization() : mutex(1), empty(10), full(0), in(0), out(0) {}
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void producer() {
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if (empty > 0 && mutex == 1) {
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wait(empty);
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wait(mutex);
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cout << "Data to be produced: ";
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int data;
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cin >> data;
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a[in] = data;
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in = (in + 1) % 10; // Update for new buffer size
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signal(mutex);
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signal(full);
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} else {
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cout << "Buffer is full, cannot produce!" << endl;
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}
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}
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void consumer() {
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if (full > 0 && mutex == 1) {
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wait(full);
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wait(mutex);
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cout << "Data consumed is: " << a[out] << endl; // Show consumed data
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out = (out + 1) % 10; // Update for new buffer size
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signal(mutex);
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signal(empty);
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} else {
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cout << "Buffer is empty, cannot consume!" << endl;
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}
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}
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};
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int main() {
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int fchoice;
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Synchronization s;
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do {
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cout << "1. Producer\n2. Consumer\n3. Exit" << endl;
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cout << "Enter your choice: ";
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cin >> fchoice;
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switch (fchoice) {
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case 1: s.producer(); break;
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case 2: s.consumer(); break;
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case 3: break;
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default: cout << "Invalid choice!" << endl; break;
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}
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} while (fchoice != 3);
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return 0;
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}
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@@ -0,0 +1,98 @@
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#include <iostream>
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using namespace std;
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int blocks[] = {100, 500, 200, 300, 600};
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int processes[] = {212, 417, 112, 426};
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int blkSize = sizeof(blocks) / sizeof(blocks[0]);
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int prSize = sizeof(processes) / sizeof(processes[0]);
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void FirstFit() {
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cout<<endl<<"FIRST FIT:";
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for (int i=0; i<prSize; i++) {
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bool check = false;
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for(int j=0; j<blkSize; j++) {
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if ((blocks[j] - processes[i] >= 0)) {
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blocks[j] -= processes[i];
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check = true;
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cout<<endl<<"Process "<<processes[i]<<" has been allocated to block "<<j+1;
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break;
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}
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}
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if (check == false) {
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cout<<endl<<"Process "<<processes[i]<<" has not been allocated.";
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}
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}
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}
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void NextFit() {
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int j = 0;
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cout<<endl<<"NEXT FIT:";
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for (int i=0; i<prSize; i++) {
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bool check = false;
|
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for (int k=0; k<blkSize; k++) {
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if ((blocks[j] - processes[i]) >= 0) {
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blocks[j] = blocks[j] - processes[i];
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cout<<endl<<"Process "<<processes[i]<<" has been allocated to block "<<j+1;
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check = true;
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break;
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}
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j = (j + 1) % blkSize;
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}
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if (check == false) {
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cout<<endl<<"Process "<<processes[i]<<" has not been allocated.";
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}
|
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}
|
||||
}
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void BestFit() {
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cout<<endl<<"BEST FIT:";
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for (int i=0; i<prSize; i++) {
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bool check = false;
|
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int k, store = 999;
|
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for (int j=0; j<blkSize; j++) {
|
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if ((blocks[j] - processes[i]) >= 0 && (blocks[j] - processes[i]) < store) {
|
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k = j + 1;
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store = blocks[j] - processes[i];
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check = true;
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}
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}
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if (check == false) {
|
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cout<<endl<<"Process "<<processes[i]<<" was not allocated to any block.";
|
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}
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else {
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blocks[k - 1] -= processes[i];
|
||||
cout<<endl<<"Process "<<processes[i]<<" was allocated to block "<<k;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void WorstFit() {
|
||||
cout<<endl<<"WORST FIT:";
|
||||
for (int i=0; i<prSize; i++) {
|
||||
bool check = false;
|
||||
int k, store = -1;
|
||||
for (int j=0; j<blkSize; j++) {
|
||||
if ((blocks[j] - processes[i] >= 0 && (blocks[j] - processes[i] > store))) {
|
||||
k = j + 1;
|
||||
store = blocks[j] - processes[i];
|
||||
check = true;
|
||||
}
|
||||
}
|
||||
if (check == false) {
|
||||
cout<<endl<<"Process "<<processes[i]<<" was not allocated to any block.";
|
||||
}
|
||||
else {
|
||||
blocks[k - 1] -= processes[i];
|
||||
cout<<endl<<"Process "<<processes[i]<<" was allocated to block "<<k;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
int main () {
|
||||
// ONLY RUN ONE FUNCTION AT A TIME.
|
||||
// FirstFit();
|
||||
// NextFit();
|
||||
BestFit();
|
||||
// WorstFit();
|
||||
return 0;
|
||||
}
|
||||
@@ -0,0 +1,135 @@
|
||||
// Assignment-B7 - Page Replacement in C++ (LRU + Optimal)
|
||||
// BEGINNING OF CODE
|
||||
#include <cmath>
|
||||
#include <complex>
|
||||
#include <iostream>
|
||||
using namespace std;
|
||||
|
||||
int refString[] = {0, 2, 1, 6, 4, 0, 1, 0, 3, 1, 2, 1};
|
||||
int window = 0, hit = 0, miss = 0, currentPages[4], lastUsed[40];
|
||||
int len = sizeof(refString) / sizeof(refString[0]);
|
||||
|
||||
int findLRU() {
|
||||
int min_index = 0;
|
||||
for (int i=1; i<window; i++) {
|
||||
if (lastUsed[i] < lastUsed[min_index]) {
|
||||
min_index = i;
|
||||
}
|
||||
}
|
||||
return min_index;
|
||||
}
|
||||
|
||||
void LRU() {
|
||||
for (int i=0; i<window; i++) {
|
||||
currentPages[i] = -1;
|
||||
lastUsed[i] = -1;
|
||||
}
|
||||
|
||||
for (int i=0; i<len; i++) {
|
||||
bool hitFlag = false;
|
||||
for (int j=0; j<window; j++) {
|
||||
if (currentPages[j] == refString[i]) {
|
||||
hit++;
|
||||
hitFlag = true;
|
||||
lastUsed[j] = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (hitFlag == false) {
|
||||
miss++;
|
||||
bool emptyFound = false;
|
||||
for (int j=0; j<window; j++) {
|
||||
if (currentPages[j] == -1) {
|
||||
emptyFound = true;
|
||||
currentPages[j] = refString[i];
|
||||
lastUsed[j] = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (emptyFound == false) {
|
||||
int lru_index = findLRU();
|
||||
currentPages[lru_index] = refString[i];
|
||||
lastUsed[lru_index] = i;
|
||||
}
|
||||
}
|
||||
}
|
||||
cout<<endl<<"----- LRU ------";
|
||||
cout<<endl<<"Number of hits: "<<hit;
|
||||
cout<<endl<<"Number of misses: "<<miss;
|
||||
}
|
||||
|
||||
int findOptimal(int current_index) {
|
||||
int max_index = -1, farthest = current_index;
|
||||
for (int i=0; i<window; i++) {
|
||||
int j;
|
||||
for (j=current_index+1; j<len; j++) {
|
||||
if (currentPages[i] == refString[j]) {
|
||||
if (j > farthest) {
|
||||
farthest = j;
|
||||
max_index = i;
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (j == len) {
|
||||
return i;
|
||||
}
|
||||
}
|
||||
return max_index;
|
||||
}
|
||||
|
||||
void Optimal() {
|
||||
hit = 0;
|
||||
miss = 0;
|
||||
|
||||
for (int i=0; i<window; i++) {
|
||||
currentPages[i] = -1;
|
||||
}
|
||||
|
||||
for (int i=0; i<len; i++) {
|
||||
bool hitFlag = false;
|
||||
for (int j=0; j<window; j++) {
|
||||
if (currentPages[j] == refString[i]) {
|
||||
hit++;
|
||||
hitFlag = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (hitFlag == false) {
|
||||
miss++;
|
||||
bool emptyFound = false;
|
||||
for (int j=0; j<window; j++) {
|
||||
if (currentPages[j] == -1) {
|
||||
emptyFound = true;
|
||||
currentPages[j] = refString[i];
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (emptyFound == false) {
|
||||
int optimal_index = findOptimal(i);
|
||||
currentPages[optimal_index] = refString[i];
|
||||
}
|
||||
}
|
||||
}
|
||||
cout<<endl<<"----- OPTIMAL -----";
|
||||
cout<<endl<<"Number of hits: "<<hit;
|
||||
cout<<endl<<"Number of misses: "<<miss;
|
||||
}
|
||||
|
||||
void display() {
|
||||
cout<<endl<<"Current pages are:\t";
|
||||
for (int i=0; i<window; i++) {
|
||||
cout<<currentPages[i]<<" ";
|
||||
}
|
||||
cout<<endl;
|
||||
}
|
||||
|
||||
int main() {
|
||||
cout<<endl<<"Enter window size:\t";
|
||||
cin>>window;
|
||||
LRU();
|
||||
display();
|
||||
Optimal();
|
||||
display();
|
||||
}
|
||||
// END OF CODE
|
||||
Reference in New Issue
Block a user