2 also cpu completed
This commit is contained in:
jazzy1902
parent
296c926b7e
commit
b032ac4783
124
lab3/ans.cpp
124
lab3/ans.cpp
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@ -1,124 +0,0 @@
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#include <iostream>
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#include <fstream>
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#include <sstream>
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#include <vector>
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#include <queue>
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#include <iomanip>
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using namespace std;
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struct Process {
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int pid;
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int arrival_time;
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vector<int> burst_times;
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int current_burst_index;
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int completion_time;
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int waiting_time;
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int turnaround_time;
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bool in_cpu;
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};
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vector<Process> processes;
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void fifo() {
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queue<Process*> ready_queue;
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int current_time = 0;
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int completed_processes = 0;
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int process_count = processes.size();
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while (completed_processes < process_count) {
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// Add processes to the ready queue based on arrival time
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for (auto& process : processes) {
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if (process.arrival_time <= current_time && !process.in_cpu) {
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ready_queue.push(&process);
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process.in_cpu = true;
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}
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}
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if (!ready_queue.empty()) {
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Process* current_process = ready_queue.front();
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ready_queue.pop();
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// Simulate CPU execution
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for (int i = current_process->current_burst_index; i < current_process->burst_times.size(); i += 2) {
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int cpu_burst = current_process->burst_times[i];
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current_time += cpu_burst; // Advance time by CPU burst duration
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current_process->current_burst_index++;
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// Handle I/O burst if there's one
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if (i + 1 < current_process->burst_times.size()) {
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int io_burst = current_process->burst_times[i + 1];
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current_time += io_burst; // Advance time by I/O burst duration
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}
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}
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current_process->completion_time = current_time;
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current_process->turnaround_time = current_process->completion_time - current_process->arrival_time;
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current_process->waiting_time = current_process->turnaround_time - (current_process->burst_times.size() / 2);
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completed_processes++;
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} else {
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// No process is ready; advance time
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current_time++;
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}
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}
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// Calculate averages
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int total_waiting_time = 0, total_turnaround_time = 0;
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for (const auto& process : processes) {
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total_waiting_time += process.waiting_time;
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total_turnaround_time += process.turnaround_time;
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}
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double avg_waiting_time = static_cast<double>(total_waiting_time) / process_count;
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double avg_turnaround_time = static_cast<double>(total_turnaround_time) / process_count;
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// Output results
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cout << "FIFO Scheduling Results:\n";
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cout << "Processes:\n";
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for (const auto& process : processes) {
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cout << "Process ID: " << process.pid
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<< ", Completion Time: " << process.completion_time
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<< ", Waiting Time: " << process.waiting_time
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<< ", Turnaround Time: " << process.turnaround_time << endl;
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}
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cout << "Average Waiting Time: " << fixed << setprecision(2) << avg_waiting_time << endl;
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cout << "Average Turnaround Time: " << fixed << setprecision(2) << avg_turnaround_time << endl;
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}
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int main(int argc, char** argv) {
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if (argc != 3) {
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cout << "Usage: ./scheduler.out <path-to-workload-file> <scheduler_algorithm>\n";
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return -1;
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}
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ifstream file(argv[1]);
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string line;
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int pid = 0;
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while (getline(file, line)) {
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if (line.empty()) continue;
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Process process;
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process.pid = pid++;
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process.current_burst_index = 0;
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process.in_cpu = false;
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istringstream iss(line);
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iss >> process.arrival_time;
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int burst_time;
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while (iss >> burst_time && burst_time != -1) {
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process.burst_times.push_back(burst_time);
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}
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processes.push_back(process);
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}
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string algorithm = argv[2];
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if (algorithm == "fifo") {
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fifo();
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} else {
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cout << "Invalid scheduling algorithm. Please use 'fifo'.\n";
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}
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return 0;
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}
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@ -1,9 +1,287 @@
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P1,1 0 5
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P2,1 5 7
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P3,1 7 8
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P1,1 8 13
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P2,2 13 14
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P3,2 14 15
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P1,1 15 20
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P1,1 20 25
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P1,2 27 28
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P2,1 5 10
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P3,1 10 15
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P4,1 15 20
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P5,1 20 23
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P1,1 23 28
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P6,1 28 33
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P7,1 33 38
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P2,1 38 43
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P3,1 43 48
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P4,1 48 53
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P5,2 53 56
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P1,1 56 61
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P7,1 61 66
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P2,1 66 71
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P3,1 71 76
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P4,2 76 81
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P5,3 81 84
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P1,1 84 89
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P7,1 89 94
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P2,1 94 99
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P3,1 99 104
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P4,2 104 109
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P1,1 109 114
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P7,1 114 119
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P2,1 119 124
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P3,1 124 129
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P4,2 129 134
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P1,1 134 139
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P7,1 139 144
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P2,1 144 149
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P3,1 149 154
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P4,2 154 159
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P1,1 159 164
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P7,1 164 169
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P2,1 169 174
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P3,1 174 179
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P4,2 179 184
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P1,1 184 189
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P7,1 189 194
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P2,1 194 199
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P3,1 199 204
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P4,2 204 209
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P1,1 209 214
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P7,1 214 219
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P2,1 219 224
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P3,1 224 229
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P4,2 229 234
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P1,1 234 239
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P7,1 239 244
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P2,1 244 249
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P3,1 249 254
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P4,2 254 259
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P1,1 259 264
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P7,1 264 269
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P2,1 269 274
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P3,1 274 279
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P4,2 279 284
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P1,1 284 289
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P7,1 289 294
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P2,1 294 299
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P3,1 299 304
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P4,2 304 309
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P1,1 309 314
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P7,1 314 319
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P2,1 319 324
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P3,1 324 329
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P4,2 329 334
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P1,1 334 339
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P7,1 339 344
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P2,1 344 349
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P3,1 349 354
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P4,2 354 359
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P1,1 359 364
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P7,1 364 369
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P2,1 369 374
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P3,2 374 379
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P4,3 379 384
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P1,1 384 389
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P7,1 389 394
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P2,1 394 399
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P3,2 399 404
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P4,3 404 409
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P1,1 409 414
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P7,1 414 419
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P2,2 419 424
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P3,2 424 429
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P4,3 429 434
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P1,1 434 439
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P7,1 439 444
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P2,2 444 449
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P3,2 449 454
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P4,3 454 459
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P1,1 459 464
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P7,1 464 469
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P2,2 469 474
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P3,2 474 479
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P4,3 479 484
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P1,1 484 489
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P7,1 489 494
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P2,2 494 499
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P3,2 499 504
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P4,3 504 509
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P1,2 509 514
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P7,1 514 519
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P2,2 519 524
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P3,2 524 529
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P4,4 529 534
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P1,2 534 539
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P7,1 539 544
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P2,2 544 549
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P3,2 549 554
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P4,4 554 559
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P1,2 559 564
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P7,1 564 569
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P2,2 569 574
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P3,2 574 579
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P4,4 579 584
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P1,2 584 589
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P7,1 589 594
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P2,2 594 599
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P3,2 599 604
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P4,4 604 609
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P1,2 609 614
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P7,1 614 619
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P2,2 619 624
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P3,2 624 629
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P4,4 629 634
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P1,2 634 639
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P7,1 639 644
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P2,2 644 649
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P3,2 649 654
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P4,4 654 659
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P1,2 659 664
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P7,1 664 669
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P2,2 669 674
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P3,2 674 679
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P4,4 679 684
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P1,2 684 689
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P7,1 689 694
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P2,2 694 699
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P3,2 699 704
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P4,4 704 709
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P1,2 709 714
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P7,1 714 719
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P2,2 719 724
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P3,3 724 729
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P4,4 729 734
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P1,2 734 739
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P7,1 739 744
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P2,2 744 749
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P3,3 749 754
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P4,4 754 759
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P1,2 759 764
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P7,1 764 769
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P2,2 769 774
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P3,3 774 779
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P4,4 779 784
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P1,2 784 789
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P7,1 789 794
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P2,2 794 799
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P3,3 799 804
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P4,4 804 809
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P1,2 809 814
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P7,1 814 819
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P2,3 819 824
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P3,3 824 829
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P4,4 829 834
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P1,2 834 839
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P7,1 839 844
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P2,3 844 849
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P3,3 849 854
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P4,4 854 859
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P1,2 859 864
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P7,1 864 869
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P2,3 869 874
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P3,3 874 879
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P4,5 879 884
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P1,2 884 889
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P7,1 889 894
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P2,3 894 899
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P3,3 899 904
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P4,5 904 909
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P1,2 909 914
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P7,1 914 919
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P2,3 919 924
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P3,4 924 929
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P4,6 929 934
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P1,2 934 939
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P7,1 939 944
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P2,3 944 949
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P3,4 949 954
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P4,6 954 959
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P1,3 959 964
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P7,1 964 969
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P2,3 969 974
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P3,4 974 979
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P1,3 979 984
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P7,1 984 989
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P2,3 989 994
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P3,4 994 999
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P1,3 999 1004
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P7,1 1004 1009
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P2,3 1009 1014
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P3,4 1014 1019
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P1,3 1019 1024
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P7,2 1024 1027
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P2,3 1027 1032
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P3,4 1032 1037
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P1,3 1037 1042
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P2,4 1042 1047
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P3,4 1047 1052
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P1,3 1052 1057
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P2,4 1057 1062
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P3,4 1062 1067
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P1,3 1067 1072
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P2,4 1072 1077
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P3,4 1077 1082
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P1,3 1082 1087
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P2,4 1087 1092
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P3,4 1092 1097
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P1,3 1097 1102
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P2,4 1102 1107
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P3,4 1107 1112
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P1,3 1112 1117
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P2,4 1117 1122
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P3,4 1122 1127
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P1,3 1127 1132
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P2,4 1132 1137
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P3,4 1137 1142
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P1,3 1142 1147
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P2,4 1147 1152
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P3,4 1152 1157
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P1,3 1157 1162
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P2,4 1162 1167
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P3,5 1167 1172
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P1,3 1172 1177
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P2,4 1177 1182
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P3,5 1182 1187
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P1,3 1187 1192
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P2,4 1192 1197
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P3,5 1197 1202
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P1,3 1202 1207
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P2,4 1207 1212
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P3,5 1212 1217
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P1,4 1217 1222
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P2,4 1222 1227
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P3,6 1227 1232
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P1,4 1232 1237
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P2,4 1237 1242
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P3,6 1242 1247
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P1,4 1247 1252
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P2,5 1252 1257
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P1,4 1257 1262
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P2,5 1262 1267
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P1,4 1267 1272
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P2,5 1272 1277
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P1,4 1277 1282
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P2,5 1282 1287
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P1,4 1287 1292
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P2,5 1292 1297
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P1,4 1297 1302
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P2,5 1302 1307
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P1,4 1307 1312
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P2,5 1312 1317
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P1,4 1317 1322
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P2,5 1322 1327
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P1,4 1327 1332
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P2,6 1332 1337
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P1,4 1337 1342
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P2,6 1342 1347
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P1,4 1347 1352
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P1,4 1352 1357
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P1,5 1359 1364
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P1,5 1364 1369
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P1,5 1369 1374
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P1,5 1374 1379
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P1,5 1379 1384
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P1,5 1384 1389
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P1,5 1389 1394
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P1,5 1394 1399
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P1,5 1399 1404
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P1,5 1404 1409
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P1,5 1409 1414
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P1,5 1414 1419
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P1,6 1421 1426
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P1,6 1426 1431
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Binary file not shown.
BIN
lab3/scheduler
BIN
lab3/scheduler
Binary file not shown.
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@ -16,41 +16,44 @@ struct process_detail {
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int in_cpu1;
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int in_cpu2;
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int current_burst_index;
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int arrvival_time = 0;
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int wait_time = 0;
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int cpu_time = 0;
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int completion_time = 0;
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};
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struct clock{
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int push_signal; //boolean
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int timer;
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};
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vector<process_detail> processes;
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queue<process_detail*> ready_queue_fifo;
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vector<process_detail*> waiting;
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process_detail* CPU1 = NULL;
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process_detail* CPU2 = NULL;
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vector<string> out_cpu1;
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vector<string> out_cpu2;
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ofstream output_file("cpu_times.txt");
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// ------------------------------------- THE FIFO ---------------------------------------
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void fifo() {
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// Clock initialized to 0
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struct clock time;
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memset(&time, 0, sizeof(struct clock));
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time.timer = 0;
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time.push_signal = 5;
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int process_count = processes.size();
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int completed_processes = 0;
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string out_string1 = "";
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string out_string2 = "";
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vector<process_detail*> waiting(process_count, NULL);
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while(completed_processes < process_count) {
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// Breaking from the infinite loop
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for (int i = 0; i < process_count; ++i) {
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if (processes[i].burst_times[processes[i].current_burst_index] == -2) {
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for (int j = 0; j < process_count; ++j) {
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if (waiting[j] != NULL && waiting[j]->burst_times[waiting[j]->current_burst_index] == -2) {
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waiting[j]->completion_time = time.timer - waiting[j]->arrvival_time - 1;
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waiting[j] = NULL;
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completed_processes++;
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}
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}
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@ -59,6 +62,7 @@ void fifo() {
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for (int i = 0; i < process_count; ++i) {
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if(processes[i].in_cpu1 != 1 || processes[i].in_cpu2 != 1) {
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if(time.timer == processes[i].burst_times[0]) {
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processes[i].arrvival_time = time.timer;
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ready_queue_fifo.push(&processes[i]);
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processes[i].current_burst_index++;
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}
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@ -96,12 +100,13 @@ void fifo() {
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//check cpu_burst complete
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for(int i = 0; i < process_count; ++i) {
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if(processes[i].in_cpu1 == 1) {
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processes[i].cpu_time += 1;
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if(CPU1->burst_times[processes[i].current_burst_index] == 0){
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out_string1 += " " + to_string(time.timer);
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out_cpu1.push_back(out_string1);
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CPU1->in_cpu1 = 0;
|
||||
CPU1->current_burst_index++;
|
||||
waiting.push_back(CPU1); // process added to waiting queue
|
||||
waiting[CPU1->pid] = CPU1; // process added to waiting queue
|
||||
if(!ready_queue_fifo.empty()) {
|
||||
CPU1 = ready_queue_fifo.front(); // process added to CPU
|
||||
CPU1->in_cpu1 = 1;
|
||||
|
|
@ -120,12 +125,13 @@ void fifo() {
|
|||
//check cpu_burst complete
|
||||
for(int i = 0; i < process_count; ++i) {
|
||||
if(processes[i].in_cpu2 == 1) {
|
||||
processes[i].cpu_time += 1;
|
||||
if(CPU2->burst_times[processes[i].current_burst_index] == 0){
|
||||
out_string2 += " " + to_string(time.timer);
|
||||
out_cpu2.push_back(out_string2);
|
||||
CPU2->in_cpu2 = 0;
|
||||
CPU2->current_burst_index++;
|
||||
waiting.push_back(CPU2); // process added to waiting queue
|
||||
waiting[CPU2->pid] = CPU2; // process added to waiting queue
|
||||
if(!ready_queue_fifo.empty()) {
|
||||
CPU2 = ready_queue_fifo.front(); // process added to CPU
|
||||
CPU2->in_cpu2 = 1;
|
||||
|
|
@ -158,7 +164,6 @@ void fifo() {
|
|||
// Increment the timer
|
||||
time.timer++;
|
||||
}
|
||||
// output_file.close();
|
||||
return;
|
||||
|
||||
}
|
||||
|
|
@ -168,7 +173,16 @@ void fifo() {
|
|||
struct Compare {
|
||||
bool operator()(process_detail* a, process_detail* b) {
|
||||
// Compare the elements in the vector at the given indices
|
||||
return a->burst_times[a->current_burst_index] > b->burst_times[b->current_burst_index];
|
||||
if (a->current_burst_index == 0) {
|
||||
return a->burst_times[a->current_burst_index + 1] > b->burst_times[b->current_burst_index];
|
||||
}
|
||||
else if(b->current_burst_index == 0) {
|
||||
return a->burst_times[a->current_burst_index] > b->burst_times[b->current_burst_index+1];
|
||||
|
||||
}
|
||||
else if(b->current_burst_index == 0 && a->current_burst_index == 0)
|
||||
return a->burst_times[a->current_burst_index+1] > b->burst_times[b->current_burst_index+1];
|
||||
else return a->burst_times[a->current_burst_index] > b->burst_times[b->current_burst_index];
|
||||
}
|
||||
};
|
||||
|
||||
|
|
@ -179,17 +193,19 @@ void sjf() {
|
|||
struct clock time;
|
||||
memset(&time, 0, sizeof(struct clock));
|
||||
time.timer = 0;
|
||||
time.push_signal = 5;
|
||||
int process_count = processes.size();
|
||||
int completed_processes = 0;
|
||||
vector<process_detail*> waiting(process_count, NULL);
|
||||
string out_string1 = "";
|
||||
string out_string2 = "";
|
||||
|
||||
while(completed_processes < process_count) {
|
||||
|
||||
// Breaking from the infinite loop
|
||||
for (int i = 0; i < process_count; ++i) {
|
||||
if (processes[i].burst_times[processes[i].current_burst_index] == -2) {
|
||||
// breaking from the infinite loop
|
||||
for (int j = 0; j < process_count; ++j) {
|
||||
if (waiting[j] != NULL && waiting[j]->burst_times[waiting[j]->current_burst_index] == -2) {
|
||||
waiting[j]->completion_time = time.timer - waiting[j]->arrvival_time - 1;
|
||||
waiting[j] = NULL;
|
||||
completed_processes++;
|
||||
}
|
||||
}
|
||||
|
|
@ -241,6 +257,7 @@ void sjf() {
|
|||
//check cpu_burst complete
|
||||
for(int i = 0; i < process_count; ++i) {
|
||||
if(processes[i].in_cpu1 == 1) {
|
||||
processes[i].cpu_time += 1;
|
||||
if(CPU1->burst_times[processes[i].current_burst_index] == 0){
|
||||
// Record out_time when the process exits the CPU
|
||||
out_string1 += " " + to_string(time.timer);
|
||||
|
|
@ -248,7 +265,7 @@ void sjf() {
|
|||
out_cpu1.push_back(out_string1);
|
||||
CPU1->in_cpu1 = 0;
|
||||
CPU1->current_burst_index++;
|
||||
waiting.push_back(CPU1); // process added to waiting queue
|
||||
waiting[CPU1->pid] = CPU1; // process added to waiting queue
|
||||
if(!ready_queue.empty()) {
|
||||
CPU1 = ready_queue.top(); // process added to CPU
|
||||
CPU1->in_cpu1 = 1;
|
||||
|
|
@ -267,6 +284,7 @@ void sjf() {
|
|||
//check cpu_burst complete
|
||||
for(int i = 0; i < process_count; ++i) {
|
||||
if(processes[i].in_cpu2 == 1) {
|
||||
processes[i].cpu_time += 1;
|
||||
if(CPU2->burst_times[processes[i].current_burst_index] == 0){
|
||||
// Record out_time when the process exits the CPU
|
||||
out_string2 += " " + to_string(time.timer);
|
||||
|
|
@ -274,7 +292,7 @@ void sjf() {
|
|||
out_cpu2.push_back(out_string2);
|
||||
CPU2->in_cpu2 = 0;
|
||||
CPU2->current_burst_index++;
|
||||
waiting.push_back(CPU2); // process added to waiting queue
|
||||
waiting[CPU2->pid] = CPU2; // process added to waiting queue
|
||||
if(!ready_queue.empty()) {
|
||||
CPU2 = ready_queue.top(); // process added to CPU
|
||||
CPU2->in_cpu2 = 1;
|
||||
|
|
@ -307,7 +325,6 @@ void sjf() {
|
|||
// Increment the timer
|
||||
time.timer++;
|
||||
}
|
||||
// output_file.close();
|
||||
return;
|
||||
}
|
||||
// --------------------------- The Pre-emptive Shortest Job First ---------------------------------
|
||||
|
|
@ -318,17 +335,20 @@ void pre_sjf() {
|
|||
struct clock time;
|
||||
memset(&time, 0, sizeof(struct clock));
|
||||
time.timer = 0;
|
||||
time.push_signal = 5;
|
||||
int process_count = processes.size();
|
||||
int completed_processes = 0;
|
||||
string out_string1 = "";
|
||||
string out_string2 = "";
|
||||
vector<process_detail*> waiting(process_count, NULL);
|
||||
|
||||
|
||||
while(completed_processes < process_count) {
|
||||
|
||||
// Breaking from the infinite loop
|
||||
for (int i = 0; i < process_count; ++i) {
|
||||
if (processes[i].burst_times[processes[i].current_burst_index] == -2) {
|
||||
// breaking from the infinite loop
|
||||
for (int j = 0; j < process_count; ++j) {
|
||||
if (waiting[j] != NULL && waiting[j]->burst_times[waiting[j]->current_burst_index] == -2) {
|
||||
waiting[j]->completion_time = time.timer - waiting[j]->arrvival_time - 1;
|
||||
waiting[j] = NULL;
|
||||
completed_processes++;
|
||||
}
|
||||
}
|
||||
|
|
@ -436,7 +456,7 @@ void pre_sjf() {
|
|||
out_cpu1.push_back(out_string1);
|
||||
CPU1->in_cpu1 = 0;
|
||||
CPU1->current_burst_index++;
|
||||
waiting.push_back(CPU1); // process added to waiting queue
|
||||
waiting[CPU1->pid] = CPU1; // process added to waiting queue
|
||||
if(!ready_queue.empty()) {
|
||||
CPU1 = ready_queue.top(); // process added to CPU
|
||||
CPU1->in_cpu1 = 1;
|
||||
|
|
@ -462,7 +482,7 @@ void pre_sjf() {
|
|||
out_cpu2.push_back(out_string2);
|
||||
CPU2->in_cpu2 = 0;
|
||||
CPU2->current_burst_index++;
|
||||
waiting.push_back(CPU2); // process added to waiting queue
|
||||
waiting[CPU2->pid] = CPU2;// process added to waiting queue
|
||||
if(!ready_queue.empty()) {
|
||||
CPU2 = ready_queue.top(); // process added to CPU
|
||||
CPU2->in_cpu2 = 1;
|
||||
|
|
@ -495,10 +515,167 @@ void pre_sjf() {
|
|||
// Increment the timer
|
||||
time.timer++;
|
||||
}
|
||||
// output_file.close();
|
||||
return;
|
||||
}
|
||||
|
||||
// ---------------------------------- The Round Robin--------------------------------------------
|
||||
|
||||
void round_robin() {
|
||||
struct clock time;
|
||||
memset(&time, 0, sizeof(struct clock));
|
||||
time.timer = 0;
|
||||
int process_count = processes.size();
|
||||
int completed_processes = 0;
|
||||
int time_quantum = 5;
|
||||
int current_quantum1 = 0;
|
||||
int current_quantum2 = 0;
|
||||
string out_string1 = "";
|
||||
string out_string2 = "";
|
||||
// Initialize waiting vector with NULLs for each process slot
|
||||
vector<process_detail*> waiting(process_count, NULL);
|
||||
|
||||
|
||||
while (completed_processes < process_count) {
|
||||
// Check for process completion
|
||||
for (int j = 0; j < process_count; ++j) {
|
||||
if (waiting[j] != NULL && waiting[j]->burst_times[waiting[j]->current_burst_index] == -2) {
|
||||
waiting[j]->completion_time = time.timer - waiting[j]->arrvival_time - 1;
|
||||
waiting[j] = NULL;
|
||||
completed_processes++;
|
||||
}
|
||||
}
|
||||
|
||||
// Managing arrival times
|
||||
for (int i = 0; i < process_count; ++i) {
|
||||
if(processes[i].in_cpu1 != 1 || processes[i].in_cpu2 != 1) {
|
||||
if(time.timer == processes[i].burst_times[0]) {
|
||||
processes[i].arrvival_time = time.timer;
|
||||
ready_queue_fifo.push(&processes[i]);
|
||||
processes[i].current_burst_index++;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
// Managing waiting queue
|
||||
for (int j = 0; j < waiting.size(); ++j) {
|
||||
if (waiting[j] != NULL) {
|
||||
if (waiting[j]->burst_times[waiting[j]->current_burst_index] == 0) {
|
||||
ready_queue_fifo.push(waiting[j]);
|
||||
waiting[j]->current_burst_index++;
|
||||
waiting[j] = NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Assign a process to CPU1 if available
|
||||
if (CPU1 == NULL && !ready_queue_fifo.empty()) {
|
||||
CPU1 = ready_queue_fifo.front();
|
||||
CPU1->in_cpu1 = 1;
|
||||
out_string1 = "P" + to_string(CPU1->pid+1) + "," + to_string((CPU1->current_burst_index + 1 ) / 2) + " " + to_string(time.timer);
|
||||
// output_file << "P" << CPU->pid + 1 << "," << (CPU->current_burst_index + 1) / 2 << " " << time.timer;
|
||||
ready_queue_fifo.pop();
|
||||
current_quantum1 = time_quantum;
|
||||
}
|
||||
|
||||
// Assign a process to CPU2 if available
|
||||
if (CPU2 == NULL && !ready_queue_fifo.empty()) {
|
||||
CPU2 = ready_queue_fifo.front();
|
||||
CPU2->in_cpu2 = 1;
|
||||
out_string2 = "P" + to_string(CPU2->pid+1) + "," + to_string((CPU2->current_burst_index + 1 ) / 2) + " " + to_string(time.timer);
|
||||
// output_file << "P" << CPU->pid + 1 << "," << (CPU->current_burst_index + 1) / 2 << " " << time.timer;
|
||||
ready_queue_fifo.pop();
|
||||
current_quantum2 = time_quantum;
|
||||
}
|
||||
|
||||
if (CPU1 != NULL) {
|
||||
for(int i = 0; i < process_count; ++i) {
|
||||
if(processes[i].in_cpu1 == 1){
|
||||
processes[i].cpu_time += 1;
|
||||
if (CPU1->burst_times[CPU1->current_burst_index] == 0 || current_quantum1 == 0) {
|
||||
// output_file << " " << time.timer << endl;
|
||||
out_string1 += " " + to_string(time.timer);
|
||||
out_cpu1.push_back(out_string1);
|
||||
CPU1->in_cpu1 = 0;
|
||||
if (CPU1->burst_times[CPU1->current_burst_index] == 0){
|
||||
CPU1->current_burst_index++;
|
||||
waiting[CPU1->pid] = CPU1;
|
||||
}
|
||||
|
||||
else if (current_quantum1 == 0) ready_queue_fifo.push(CPU1);
|
||||
|
||||
// Place the process in its corresponding waiting slot by pid
|
||||
|
||||
if (!ready_queue_fifo.empty()) {
|
||||
CPU1 = ready_queue_fifo.front();
|
||||
CPU1->in_cpu1 = 1;
|
||||
out_string1 = "P" + to_string(CPU1->pid+1) + "," + to_string((CPU1->current_burst_index + 1 ) / 2) + " " + to_string(time.timer);
|
||||
// output_file << "P" << CPU->pid + 1 << "," << (CPU->current_burst_index + 1) / 2 << " " << time.timer;
|
||||
ready_queue_fifo.pop();
|
||||
current_quantum1 = time_quantum;
|
||||
} else {
|
||||
CPU1 = NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
if (CPU2 != NULL) {
|
||||
for(int i = 0; i < process_count; ++i) {
|
||||
if(processes[i].in_cpu2 == 1){
|
||||
processes[i].cpu_time += 1;
|
||||
if (CPU2->burst_times[CPU2->current_burst_index] == 0 || current_quantum2 == 0) {
|
||||
// output_file << " " << time.timer << endl;
|
||||
out_string2 += " " + to_string(time.timer);
|
||||
out_cpu2.push_back(out_string2);
|
||||
CPU2->in_cpu2 = 0;
|
||||
if (CPU2->burst_times[CPU2->current_burst_index] == 0){
|
||||
CPU2->current_burst_index++;
|
||||
waiting[CPU2->pid] = CPU2;
|
||||
}
|
||||
|
||||
else if (current_quantum2 == 0) ready_queue_fifo.push(CPU2);
|
||||
|
||||
// Place the process in its corresponding waiting slot by pid
|
||||
|
||||
if (!ready_queue_fifo.empty()) {
|
||||
CPU2 = ready_queue_fifo.front();
|
||||
CPU2->in_cpu2 = 1;
|
||||
out_string2 = "P" + to_string(CPU2->pid+1) + "," + to_string((CPU2->current_burst_index + 1 ) / 2) + " " + to_string(time.timer);
|
||||
// output_file << "P" << CPU->pid + 1 << "," << (CPU->current_burst_index + 1) / 2 << " " << time.timer;
|
||||
ready_queue_fifo.pop();
|
||||
current_quantum2 = time_quantum;
|
||||
} else {
|
||||
CPU2 = NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if(CPU1 != NULL) {
|
||||
CPU1->burst_times[CPU1->current_burst_index]--;
|
||||
current_quantum1--;
|
||||
}
|
||||
|
||||
if(CPU2 != NULL) {
|
||||
CPU2->burst_times[CPU2->current_burst_index]--;
|
||||
current_quantum2--;
|
||||
}
|
||||
|
||||
// Manage IO bursts in waiting queue
|
||||
for (int j = 0; j < process_count; ++j) {
|
||||
if (waiting[j] != NULL && waiting[j]->burst_times[waiting[j]->current_burst_index] != 0) {
|
||||
waiting[j]->burst_times[waiting[j]->current_burst_index]--;
|
||||
}
|
||||
}
|
||||
|
||||
// Increment the timer
|
||||
time.timer++;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
int main(int argc, char **argv) {
|
||||
|
||||
if(argc != 3)
|
||||
|
|
@ -543,6 +720,9 @@ int main(int argc, char **argv) {
|
|||
string temp1 = scheduler_algorithm;
|
||||
// string temp1 = "pre_sjf";
|
||||
|
||||
// Start time point
|
||||
auto start = std::chrono::high_resolution_clock::now();
|
||||
|
||||
switch(temp[temp1]){
|
||||
case 1:
|
||||
fifo();
|
||||
|
|
@ -553,12 +733,15 @@ int main(int argc, char **argv) {
|
|||
case 3:
|
||||
pre_sjf();
|
||||
break;
|
||||
// case 4:
|
||||
// round_robin();
|
||||
// break;
|
||||
case 4:
|
||||
round_robin();
|
||||
break;
|
||||
default:
|
||||
cout << "enter fifo or sjf or pre_sjf or rr" << endl;
|
||||
}
|
||||
auto end = std::chrono::high_resolution_clock::now();
|
||||
auto duration = std::chrono::duration_cast<std::chrono::microseconds>(end - start);
|
||||
|
||||
output_file << "CPU1" << endl;
|
||||
for(int i = 0; i < out_cpu1.size(); ++i) {
|
||||
output_file << out_cpu1[i] << endl;
|
||||
|
|
@ -568,5 +751,21 @@ int main(int argc, char **argv) {
|
|||
for(int i = 0; i < out_cpu2.size(); ++i) {
|
||||
output_file << out_cpu2[i] << endl;
|
||||
}
|
||||
float tot = 0;
|
||||
int count = processes.size();
|
||||
for(int i = 0; i < processes.size(); ++i) {
|
||||
tot += processes[i].completion_time;
|
||||
cout << "Process " << i+1 << " Completion Time: " << processes[i].completion_time << endl;
|
||||
}
|
||||
cout << "Average Completion Time: " << tot/count << endl;
|
||||
tot = 0;
|
||||
for(int i = 0; i < processes.size(); ++i) {
|
||||
tot += processes[i].completion_time - processes[i].cpu_time;
|
||||
cout << "Process " << i+1 << " Waiting Time: " << processes[i].completion_time - processes[i].cpu_time << endl;
|
||||
// cout << "Process " << i+1 << " Waiting Time: " << processes[i].wait_time << endl;
|
||||
}
|
||||
cout << "Average Waiting Time: " << tot/count << endl;
|
||||
|
||||
std::cout << "Execution time: " << duration.count() << " ms" << std::endl;
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -22,15 +22,12 @@ struct process_detail {
|
|||
};
|
||||
|
||||
struct clock{
|
||||
int push_signal; //boolean
|
||||
int timer;
|
||||
|
||||
};
|
||||
|
||||
vector<process_detail> processes;
|
||||
queue<process_detail*> ready_queue_fifo;
|
||||
struct process_detail* CPU = NULL;
|
||||
|
||||
ofstream output_file("cpu_times.txt");
|
||||
vector<string> out_strings;
|
||||
|
||||
|
|
@ -43,7 +40,6 @@ void fifo() {
|
|||
struct clock time;
|
||||
memset(&time, 0, sizeof(struct clock));
|
||||
time.timer = 0;
|
||||
time.push_signal = 0;
|
||||
int process_count = processes.size();
|
||||
int completed_processes = 0;
|
||||
vector<process_detail*> waiting(process_count, NULL);
|
||||
|
|
@ -169,7 +165,6 @@ void sjf() {
|
|||
struct clock time;
|
||||
memset(&time, 0, sizeof(struct clock));
|
||||
time.timer = 0;
|
||||
time.push_signal = 0;
|
||||
int process_count = processes.size();
|
||||
int completed_processes = 0;
|
||||
// Initialize waiting vector with NULLs for each process slot
|
||||
|
|
@ -276,7 +271,6 @@ void pre_sjf() {
|
|||
struct clock time;
|
||||
memset(&time, 0, sizeof(struct clock));
|
||||
time.timer = 0;
|
||||
time.push_signal = 0;
|
||||
int process_count = processes.size();
|
||||
int completed_processes = 0;
|
||||
// Initialize waiting vector with NULLs for each process slot
|
||||
|
|
@ -404,12 +398,11 @@ void pre_sjf() {
|
|||
|
||||
|
||||
// ------------------------------------------- Round Robin --------------------------------------------------
|
||||
// vector<process_detail*> waiting;
|
||||
|
||||
void round_robin() {
|
||||
struct clock time;
|
||||
memset(&time, 0, sizeof(struct clock));
|
||||
time.timer = 0;
|
||||
time.push_signal = 0;
|
||||
int process_count = processes.size();
|
||||
int completed_processes = 0;
|
||||
int time_quantum = 5;
|
||||
|
|
|
|||
Loading…
Reference in New Issue