| public static output ( string name, double pi, long iterations, double elapseTime, int threadCount ) : void | ||
| name | string | |
| pi | double | |
| iterations | long | |
| elapseTime | double | |
| threadCount | int | |
| return | void | |
private static void execute(int numberOfTasks)
{
const int n = 1000000000;
const double delta = 1.0 / n;
long startTimeHundredsOfNanos = System.DateTime.Now.Ticks;
int sliceSize = n / numberOfTasks;
System.Threading.Thread[] threads = new System.Threading.Thread[numberOfTasks];
Accumulator accumulator = new Accumulator();
for (int i = 0; i < numberOfTasks; ++i)
{
Task task = new Task(1 + i * sliceSize, (i + 1) * sliceSize, delta, accumulator);
threads[i] = new System.Threading.Thread(new System.Threading.ThreadStart(task.execute));
}
foreach (System.Threading.Thread t in threads)
{
t.Start();
}
foreach (System.Threading.Thread t in threads)
{
t.Join();
}
double pi = 4.0 * delta * accumulator.getSum();
double elapseTime = (System.DateTime.Now.Ticks - startTimeHundredsOfNanos) / 1e7;
Output.output("Threads Task Class Delegate Sync Object", pi, n, elapseTime, numberOfTasks);
}
public static void Main(string[] args)
{
const int n = 1000000000;
const double delta = 1.0 / n;
long startTimeHundredsOfNanos = System.DateTime.Now.Ticks;
double sum = 0.0;
for (int i = 1; i <= n; ++i)
{
double x = (i - 0.5) * delta;
sum += 1.0 / (1.0 + x * x);
}
double pi = 4.0 * delta * sum;
double elapseTime = (System.DateTime.Now.Ticks - startTimeHundredsOfNanos) / 1e7;
Output.output("Sequential", pi, n, elapseTime);
}
private static void execute(int numberOfTasks)
{
const int n = 1000000000;
const double delta = 1.0 / n;
long startTimeHundredsOfNanos = System.DateTime.Now.Ticks;
int sliceSize = n / numberOfTasks;
System.Threading.Thread[] threads = new System.Threading.Thread[numberOfTasks];
Accumulator accumulator = new Accumulator();
for (int i = 0; i < numberOfTasks; ++i)
{
int start = 1 + i * sliceSize;
int end = (i + 1) * sliceSize;
threads[i] = new System.Threading.Thread(new System.Threading.ThreadStart(delegate() {
double localSum = 0.0;
for (int j = start; j <= end; ++j)
{
double x = (j - 0.5) * delta;
localSum += 1.0 / (1.0 + x * x);
}
accumulator.add(localSum);
}
));
}
foreach (System.Threading.Thread t in threads)
{
t.Start();
}
foreach (System.Threading.Thread t in threads)
{
t.Join();
}
double pi = 4.0 * delta * accumulator.getSum();
double elapseTime = (System.DateTime.Now.Ticks - startTimeHundredsOfNanos) / 1e7;
Output.output("Threads Anonymous Delegate Sync Object", pi, n, elapseTime, numberOfTasks);
}