Hi,
how many threads you see in the mentioned state?
Thanks.
WBR,
Alexey.
On Sep 9, 2008, at 15:44 , gnome wrote:
>
> Hi all,
> I am using grizzly for a nio server. And it always take 800% CPU
> on a
> multi-core system. In kill -3 log there is many thread is doing
> epollWait()
> like this:
> "Thread-27" prio=10 tid=0x00002aaaf72c8400 nid=0x7217 runnable
> [0x0000000043159000..0x0000000043159ab0]
> java.lang.Thread.State: RUNNABLE
> at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
> at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:
> 215)
> at
> sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:65)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:
> 69)
> - locked <0x00002aaab35a5e78> (a sun.nio.ch.Util$1)
> - locked <0x00002aaab35a5e60> (a
> java.util.Collections$UnmodifiableSet)
> - locked <0x00002aaab35a5ad0> (a sun.nio.ch.EPollSelectorImpl)
> at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:80)
> at
> com.sun.grizzly.TCPSelectorHandler.select(TCPSelectorHandler.java:343)
> at com.sun.grizzly.Controller.doSelect(Controller.java:280)
> at com.sun.grizzly.ReadController.start(ReadController.java:
> 108)
> - locked <0x00002aaab35a6120> (a java.lang.Object)
> at com.sun.grizzly.Controller.run(Controller.java:652)
> at java.lang.Thread.run(Thread.java:619)
>
>
> The server code is:
>
> int port = 5333;
> try {
> Controller controller = new Controller();
> TCPSelectorHandler selectorHandler = new TCPSelectorHandler(false);
> selectorHandler.setPort(port);
> selectorHandler.setSocketTimeout(5 * 60 * 1000);
> selectorHandler.setSelectTimeout(50);
> controller.setSelectorHandler(selectorHandler);
> controller.setReadThreadsCount(10);
> controller.setHandleReadWriteConcurrently(true);
>
> DefaultSelectionKeyHandler keyHandler = new
> DefaultSelectionKeyHandler(
> selectorHandler) {
>
> @Override
> public void register(Iterator<SelectionKey> iterator, int ops) {
> long currentTime = System.currentTimeMillis();
> SelectionKey key;
> while (iterator.hasNext()) {
> key = iterator.next();
> iterator.remove();
> if (!key.isValid()) {
> continue;
> }
>
> key.interestOps(key.interestOps() | ops);
> Object attachment = key.attachment();
> // By default, attachment a null.
> if (attachment == null) {
> key.attach(currentTime);
> } else if (attachment instanceof ThreadAttachment) {
> }
> }
> }
> };
> selectorHandler.setSelectionKeyHandler(keyHandler);
>
> final DefaultProtocolChain protocolChain = new
> DefaultProtocolChain();
>
> DefaultProtocolChainInstanceHandler instanceHandler = new
> DefaultProtocolChainInstanceHandler() {
> /**
> * Always return instance of ProtocolChain.
> */
> @Override
> public ProtocolChain poll() {
> return protocolChain;
> }
>
> /**
> * Pool an instance of ProtocolChain.
> */
> @Override
> public boolean offer(ProtocolChain instance) {
> return true;
> }
> };
>
> controller.setProtocolChainInstanceHandler(instanceHandler);
>
> protocolChain.addFilter(new MimoXMLReadFilter(true));
>
> DefaultPipeline pipeLine = new DefaultPipeline(3,2
> "pipeline", port, 3);
> pipeLine.setInitialByteBufferSize(8192);
> controller.setPipeline(pipeLine);
>
> new Thread(controller).start();
>
> } catch (Exception e) {
> log.error("Error starting on port " + port, e);
> }
> --
> View this message in context: http://www.nabble.com/Why-so-many-threads--tp19392738p19392738.html
> Sent from the Grizzly - Users mailing list archive at Nabble.com.
>
>
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