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[#3378] Automatically increase number of possible handled events

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Motivation:

At the moment the max number of events that can be handled per epoll wakup was set during construction.

Modifications:

- Automatically increase the max number of events to handle

Result:

Better performance when a lot of events need to be handled without adjusting the code.
This commit is contained in:
Norman Maurer 2015-01-29 20:53:52 +01:00
parent c66da29644
commit 6b8ec6b781
2 changed files with 19 additions and 4 deletions
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16
transport-native-epoll/src/main/java/io/netty/channel/epoll/EpollEventLoop.java
View File

@ -51,7 +51,8 @@ final class EpollEventLoop extends SingleThreadEventLoop {
private final int epollFd;
private final int eventFd;
private final IntObjectMap<AbstractEpollChannel> ids = new IntObjectHashMap<AbstractEpollChannel>();
private final long[] events;
private final boolean allowGrowing;
private long[] events;
private int id;
@ -61,7 +62,13 @@ final class EpollEventLoop extends SingleThreadEventLoop {
EpollEventLoop(EventLoopGroup parent, Executor executor, int maxEvents) {
super(parent, executor, false);
events = new long[maxEvents];
if (maxEvents == 0) {
allowGrowing = true;
events = new long[128];
} else {
allowGrowing = false;
events = new long[maxEvents];
}
boolean success = false;
int epollFd = -1;
int eventFd = -1;
@ -268,7 +275,10 @@ final class EpollEventLoop extends SingleThreadEventLoop {
final long ioTime = System.nanoTime() - ioStartTime;
runAllTasks(ioTime * (100 - ioRatio) / ioRatio);
}
if (allowGrowing && ready == events.length) {
// double the size of the array as we needed the whole space for the events
events = new long[events.length << 1];
}
if (isShuttingDown()) {
closeAll();
if (confirmShutdown()) {

7
transport-native-epoll/src/main/java/io/netty/channel/epoll/EpollEventLoopGroup.java
View File

@ -46,14 +46,19 @@ public final class EpollEventLoopGroup extends MultithreadEventLoopGroup {
/**
* Create a new instance using the specified number of threads and the given {@link ThreadFactory}.
*/
@SuppressWarnings("deprecation")
public EpollEventLoopGroup(int nThreads, ThreadFactory threadFactory) {
this(nThreads, threadFactory, 128);
this(nThreads, threadFactory, 0);
}
/**
* Create a new instance using the specified number of threads, the given {@link ThreadFactory} and the given
* maximal amount of epoll events to handle per epollWait(...).
*
* @deprecated Use {@link #EpollEventLoopGroup(int)}, {@link #EpollEventLoopGroup(int)} or
* {@link #EpollEventLoopGroup(int, ThreadFactory)}
*/
@Deprecated
public EpollEventLoopGroup(int nThreads, ThreadFactory threadFactory, int maxEventsAtOnce) {
super(nThreads, threadFactory, maxEventsAtOnce);
}