int main (int argc, char **argv)
{
int threads, num_barrier;
if( argc == 3 ){
threads = atoi( argv[1] );
num_barrier = atoi( argv[2] );
dissemination_barrier_init(threads);
}
else{
printf("Syntax:\n./dissemination num_threads num_barriers\n");
exit(-1);
}
// Serial code
printf("Serial section\n");
omp_set_num_threads( threads );
//int count = threads;
#pragma omp parallel default(none) shared(num_barrier)
{
// Parallel section
int num_threads = omp_get_num_threads();
int thread_num = omp_get_thread_num();
int j;
double total_time = 0;
double time1, time2;
for(j=0; j<num_barrier; j++){
printf("Hello World from thread %d of %d.\n", thread_num, num_threads);
time1 = omp_get_wtime();
// Barrier
dissemination_barrier();
time2 = omp_get_wtime();
total_time += time2 - time1;
printf("Bye-Bye World from thread %d of %d.\n", thread_num, num_threads);
}
printf("Time spent in barrier(s) by thread %d is %f\n", thread_num, total_time);
}
printf("Back in the serial section again\n");
return 0;
}
int main (int argc, char ** argv)
{
MPI_Init(&argc, &argv);
bool pid_sense = true;
int parity = 0;
int myrank;
struct timeval tv;
double curr_time_s;
double curr_time_us;
dissemination_barrier_init();
int i,j,k,count=0;
struct timeval tv1, tv2;
int N=10000;
double total_time;
MPI_Comm_rank(MPI_COMM_WORLD,&myrank);
if(rank == 0)
{
gettimeofday(&tv1, NULL);
}
for(i=0;i<N;i++)
{
// double delaySecs = drand48()*10;
// int sleepSecs = (int) delaySecs;
// sleep(sleepSecs);
/* fflush(stdout);
gettimeofday(&tv, NULL);
curr_time_s=(double) tv.tv_usec + (double) tv.tv_sec*1000000;
printf("Barrier %d reached by %d at time %f\n", count++, myrank,curr_time_s);
*/ // MPI_Barrier(MPI_COMM_WORLD);
dissemination_barrier(&pid_sense);
// delaySecs = drand48()*10;
// sleepSecs = (int) delaySecs;
// sleep(sleepSecs);
/* fflush(stdout);
gettimeofday(&tv, NULL);
curr_time_s=(double) tv.tv_usec + (double) tv.tv_sec*1000000;
printf("Barrier %d reached by %d at time %f\n", count++, myrank,curr_time_s);
*/// MPI_Barrier(MPI_COMM_WORLD);
dissemination_barrier(&pid_sense);
// delaySecs = drand48()*10;
// sleepSecs = (int) delaySecs;
// sleep(sleepSecs);
/* fflush(stdout);
gettimeofday(&tv, NULL);
curr_time_s=(double) tv.tv_usec + (double) tv.tv_sec*1000000;
printf("Barrier %d reached by %d at time %f\n", count++, myrank,curr_time_s);
*/// MPI_Barrier(MPI_COMM_WORLD);
dissemination_barrier(&pid_sense);
// delaySecs = drand48()*10;
// sleepSecs = (int) delaySecs;
// sleep(sleepSecs);
/* fflush(stdout);
gettimeofday(&tv, NULL);
curr_time_s=(double) tv.tv_usec + (double) tv.tv_sec*1000000;
printf("Barrier %d reached by %d at time %f\n", count++, myrank,curr_time_s);
*/// MPI_Barrier(MPI_COMM_WORLD);
dissemination_barrier(&pid_sense);
// delaySecs = drand48()*10;
// sleepSecs = (int) delaySecs;
// sleep(sleepSecs);
/* fflush(stdout);
gettimeofday(&tv, NULL);
curr_time_s=(double) tv.tv_usec + (double) tv.tv_sec*1000000;
printf("Barrier %d reached by %d at time %f\n", count++, myrank,curr_time_s);
*/// MPI_Barrier(MPI_COMM_WORLD);
dissemination_barrier(&pid_sense);
}
if(rank==0)
{
gettimeofday(&tv2, NULL);
total_time = (double) (tv2.tv_usec - tv1.tv_usec) + (double) (tv2.tv_sec - tv1.tv_sec)*1000000;
printf("\nSUMMARY:\nNumber of processes: %d\n Total run-time for %d "
"loops with 5 barriers per loop: %fs\n"
"The average time per barrier: %fus\n",
P, N, total_time/1000000, (double)(total_time/(N*5)));
}
dissemination_barrier_finish();
MPI_Finalize();
return 0;
}
