134 lines
4.4 KiB
C++
134 lines
4.4 KiB
C++
#include<iostream>
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#include<mpi.h>
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#include<stdlib.h>
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#include<time.h>
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#include<queue>
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#define MCW MPI_COMM_WORLD
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#define GENERIC 0
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#define SPECIAL 1
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#define JOB 1
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#define TOKEN 2
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using namespace std;
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int main(int argc, char **argv) {
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int rank, size;
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int jobFlag, tokenFlag;
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int tasksCreated = 0;
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int tasksCompleted = 0;
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int taskLimit;
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int tokenValue = SPECIAL;
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int myToken = SPECIAL;
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int newTask;
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bool hasToken = false;
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queue<int> myTasks;
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MPI_Status status;
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MPI_Request request;
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MPI_Init(&argc, &argv);
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MPI_Comm_rank(MCW, &rank);
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MPI_Comm_size(MCW, &size);
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srand(time(NULL) + rank);
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taskLimit = rand() % 1025 + 1024; //Set the limit to some number between 1024 and 2048
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if (rank == 0) {
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hasToken = true;
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int job = rand() % 3 + 1;
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tasksCreated++;
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MPI_Send(&job, 1, MPI_INT, rand() % 4, JOB, MCW); //Send out the initial job
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}
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while (true) {
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MPI_Iprobe(MPI_ANY_SOURCE, JOB, MCW, &jobFlag, &status); //Check to see if a job is available
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if (jobFlag) {
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MPI_Irecv(&newTask, 1, MPI_INT, MPI_ANY_SOURCE, JOB, MCW, &request);
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myTasks.push(newTask);
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}
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if (newTask == -1) { //If the stop signal is received, send my info to process 0 and break out of the loop
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MPI_Send(&tasksCreated, 1, MPI_INT, 0, size - 1, MCW);
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MPI_Send(&tasksCompleted, 1, MPI_INT, 0, size, MCW);
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break;
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}
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if (myTasks.size() > 16) { //If my task queue is greater than size 16, send off 2 tasks
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for (int i = 0; i < 2; i++) {
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int task = myTasks.front();
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myTasks.pop();
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int dest = rand() % 4;
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while (dest == rank) { dest = rand() % size; }
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if (dest < rank) { myToken = GENERIC; }
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MPI_Send(&task, 1, MPI_INT, dest, JOB, MCW);
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}
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}
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if (!myTasks.empty()) {
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int num = myTasks.front();
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myTasks.pop();
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num ^ 3 - num ^ 4;
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tasksCompleted++;
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}
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if (tasksCreated < taskLimit) {
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for (int i = 0; i < rand() % size; i++) {
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myTasks.push(rand() % size);
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tasksCreated++;
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}
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}
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if (myTasks.empty()) { //Check the token information
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if (hasToken) {
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string tmp = "";
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if (tokenValue == GENERIC)
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tmp = "Generic";
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else
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tmp = "Special";
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cout << "My Rank: " << rank << " My token: " << tmp << endl;
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int dest = rank + 1 < size ? rank + 1 : 0;
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if (rank == 0) { tokenValue = SPECIAL; }
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MPI_Send(&tokenValue, 1, MPI_INT, dest, TOKEN, MCW);
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hasToken = false;
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myToken = SPECIAL;
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} else {
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int src = 0;
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if(rank - 1 >= 0)
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src = rank - 1;
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else
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src = size - 1;
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MPI_Iprobe(src, TOKEN, MCW, &tokenFlag, &status);
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if (tokenFlag) {
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MPI_Irecv(&tokenValue, 1, MPI_INT, src, TOKEN, MCW, &request);
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hasToken = true;
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if (rank == 0 && tokenValue == SPECIAL) {
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int Stop = -1;
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for (int i = 1; i < size; i++) {
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MPI_Send(&Stop, 1, MPI_INT, i, JOB, MCW);
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}
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break;
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}
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if (myToken == GENERIC) {
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tokenValue = GENERIC;
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}
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}
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}
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}
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}
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//Print info after run.
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if (rank == 0) {
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int created;
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int completed;
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cout << "Rank 0 created " << tasksCreated << " tasks and completed " << tasksCompleted << " tasks" << endl;
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for (int i = 0; i < size; i++) {
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MPI_Recv(&created, 1, MPI_INT, i, size - 1, MCW, MPI_STATUS_IGNORE);
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MPI_Recv(&completed, 1, MPI_INT, i, size, MCW, MPI_STATUS_IGNORE);
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cout << "Rank " << i << " created " << created << " tasks and completed " << completed << " tasks" << endl;
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tasksCreated += created;
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tasksCompleted += completed;
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}
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cout << "Tasks Created: " << tasksCreated << endl;
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cout << "Tasks Completed: " << tasksCompleted << endl;
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}
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MPI_Finalize();
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return 0;
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} |