private static void loopWait() throws Exception {
atomicBoolean.lazySet(true);
// atomicBoolean.set(true);
// volatileField = true;
// Thread.yield();
// LockSupport.parkNanos(1);
// Thread.sleep(1);
// ## IPC latency results ##
//
// Intel Core 2 Quad Q6600 @ 3.0GHz (Kentsfield), Windows 7 64-bit
// 1 cache line 2 cache lines
// lazySet()
// set()
// volatile 99.9 ns 125.55 ns
// yield() 208.25 ns
// parkNanos(1) 695000.0 ns
// sleep(1) 704000.0 ns
// none deadlock deadlock
//
// Intel Core i7 860 @ 2.8GHz (Lynnfield), Windows 7 64-bit, jdk1.7.0_17 64-bit
// 1 cache line 2 cache lines
// lazySet() 68.85 ns 91.9 ns
// set() 47.7 ns 95.0 ns
// volatile 47.65-78.6 ns 91.65 ns
// yield() 74.1 ns 110.3 ns
// parkNanos(1) 640900.0 ns 691700.0 ns
// sleep(1) 711150.0 ns 655000.0 ns
// none deadlock deadlock
}
/** Indicates the method {@link #put(Object)} will not be called in the queue anymore. */
public void done() {
// Lazily set here, and then come back in handleClose and use set if necessary
done.lazySet(true);
try {
queue.add(afterLast);
} catch (IllegalStateException e) {
// no thread is waiting on this queue anyway
}
}
/**
* @param keyIndex the index of the key that has changed, the list of keys is provided by the
* constructor {@link KeyInterestUpdater(int, SelectionKey[])}
*/
public void set(int keyIndex) {
changeOfOpWriteRequired.set(keyIndex);
wasChanged.lazySet(true);
}
@Override
public void forceBootstrap() {
forceBootstrap.lazySet(true);
}