Java测试时间性能测试（多线程）

CyclicBarrier barrier = new CyclicBarrier(count);//设置当所有的线程都到达才一起工作

CountDownLatch latch = new CountDownLatch(count);//当count减完说明所有的线程都执行完毕

完整代码如下：

public static void main(String[] args) throws InterruptedException

{

int count = 20;

CyclicBarrier barrier = new CyclicBarrier(count);

CountDownLatch latch = new CountDownLatch(count);

long t0 = System.currentTimeMillis();

for (int i = 0; i < count; i++)

{

new Thread(new tenThree(barrier, latch)).start();

}

latch.await();//等待所有线程完毕

long t1 = System.currentTimeMillis();

System.out.println(t1 - t0);

}

tenThree的run方法：

public void run()

{

// TODO Auto-generated method stub

LogEvent logEvent = new WriteDisk();

try

{

barrier.await();//线程开始时要等待所有线程到达

}

catch (InterruptedException | BrokenBarrierException e)

{

// TODO Auto-generated catch block

e.printStackTrace();

}

ByteBuffer buffer = ByteBuffer.allocate(512);

buffer.limit(512);

for (int i = 0; i < 10; i++)

{

logEvent.write(buffer);

buffer.position(0);

}

latch.countDown();//线程结束时减去线程数

}