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Fixed excessive CPU consumption

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This commit is contained in:
Trustin Lee 2009-01-20 09:03:31 +00:00
parent 3e0d1f69b0
commit 11f7606b6d
1 changed files with 50 additions and 42 deletions
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54
src/main/java/org/jboss/netty/handler/timeout/HashedWheelTimer.java
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@ -155,17 +155,14 @@ public class HashedWheelTimer implements Timer {
// Add the timeout to the wheel.
HashedWheelTimeout timeout;
long currentTime = System.nanoTime();
lock.readLock().lock();
try {
timeout = new HashedWheelTimeout(
task, wheelCursor, System.nanoTime(), initialDelay);
task, wheelCursor, currentTime, initialDelay);
wheel[schedule(timeout)].add(timeout);
// Start the worker if necessary.
if (activeTimeouts.getAndIncrement() == 0) {
executor.execute(worker);
}
increaseActiveTimeouts();
} finally {
lock.readLock().unlock();
}
@ -173,6 +170,13 @@ public class HashedWheelTimer implements Timer {
return timeout;
}
void increaseActiveTimeouts() {
// Start the worker if necessary.
if (activeTimeouts.getAndIncrement() == 0) {
executor.execute(worker);
}
}
private int schedule(HashedWheelTimeout timeout) {
return schedule(timeout, timeout.initialDelay);
}
@ -217,6 +221,8 @@ public class HashedWheelTimer implements Timer {
private final class Worker implements Runnable {
private volatile long threadSafeStartTime;
private volatile long threadSafeTick;
private long startTime;
private long tick;
Worker() {
@ -227,15 +233,24 @@ public class HashedWheelTimer implements Timer {
List<HashedWheelTimeout> expiredTimeouts =
new ArrayList<HashedWheelTimeout>();
long startTime = threadSafeStartTime;
startTime = threadSafeStartTime;
tick = threadSafeTick;
if (startTime == 0) {
startTime = System.nanoTime();
tick = 1;
}
try {
boolean continueTheLoop;
do {
startTime = waitForNextTick(startTime);
startTime = waitForNextTick();
continueTheLoop = fetchExpiredTimeouts(expiredTimeouts);
notifyExpiredTimeouts(expiredTimeouts);
} while (continueTheLoop && !ExecutorUtil.isShutdown(executor));
} finally{
threadSafeStartTime = startTime;
threadSafeTick = tick;
}
}
private boolean fetchExpiredTimeouts(
@ -277,9 +292,8 @@ public class HashedWheelTimer implements Timer {
ReusableIterator<HashedWheelTimeout> i) {
long currentTime = System.nanoTime();
boolean notEmpty = i.hasNext();
if (notEmpty) {
do {
i.rewind();
while (i.hasNext()) {
HashedWheelTimeout timeout = i.next();
synchronized (timeout) {
if (timeout.remainingRounds <= 0) {
@ -296,8 +310,6 @@ public class HashedWheelTimer implements Timer {
timeout.remainingRounds --;
}
}
} while (i.hasNext());
i.rewind();
}
}
@ -312,7 +324,7 @@ public class HashedWheelTimer implements Timer {
expiredTimeouts.clear();
}
private long waitForNextTick(long startTime) {
private long waitForNextTick() {
for (;;) {
final long currentTime = System.nanoTime();
final long sleepTime = tickDuration * tick - (currentTime - startTime);
@ -411,11 +423,7 @@ public class HashedWheelTimer implements Timer {
}
if (wheel[newStopIndex].add(this)) {
// Start the worker if necessary.
if (activeTimeouts.getAndIncrement() == 0) {
executor.execute(worker);
}
increaseActiveTimeouts();
}
} finally {
extensionCount ++;
@ -514,12 +522,12 @@ public class HashedWheelTimer implements Timer {
for (int i = 0; i < 1; i ++) {
timer.newTimeout(new TimerTask() {
public void run(Timeout timeout) throws Exception {
//System.out.println(Thread.currentThread().getName() + ": " + timeout.getExtensionCount() + ": " + timeout);
System.out.println(Thread.currentThread().getName() + ": " + timeout.getExtensionCount() + ": " + timeout);
timeout.extend();
int c = e.getActiveCount();
if (c > 1) {
System.out.println(System.currentTimeMillis() + ": " + c);
}
// if (c > 1) {
// System.out.println(System.currentTimeMillis() + ": " + c);
// }
}
}, 100, TimeUnit.MILLISECONDS);
}