338035 Default acceptors 0.25*CPUs and improved selector/acceptor thread names

git-svn-id: svn+ssh://dev.eclipse.org/svnroot/rt/org.eclipse.jetty/jetty/trunk@2827 7e9141cc-0065-0410-87d8-b60c137991c4

VERSION.txt

@@ -17,6 +17,7 @@ jetty-7.3.1-SNAPSHOT
  + 337878 Extra tests of security constraints
  + 337896 HttpExchange.timeout does not override HttpClient.timeout
  + 337898 set client HttpConnection max idle time from exchange timeout
+ + 338035 Default acceptors 0.25*CPUs and improved selector/acceptor thread names.
  + JETTY-1317 More elegent handling of bad URIs in requests
  + JETTY-1331 Allow alternate XML configuration processors (eg spring)
  + JETTY-1335 HttpClient's SelectConnector clean-up

example-jetty-embedded/src/main/java/org/eclipse/jetty/embedded/LikeJettyXml.java

@@ -39,7 +39,6 @@ public class LikeJettyXml
 {
     public static void main(String[] args) throws Exception
     {
-        Log.getLog().setDebugEnabled(true);
         String jetty_home = System.getProperty("jetty.home","../jetty-distribution/target/distribution");
         System.setProperty("jetty.home",jetty_home);
 

jetty-server/src/main/java/org/eclipse/jetty/server/AbstractConnector.java

@@ -793,6 +793,7 @@ public abstract class AbstractConnector extends HttpBuffers implements Connector
         return name + "@" + (getHost() == null?"0.0.0.0":getHost()) + ":" + (getLocalPort() <= 0?getPort():getLocalPort());
     }
 
+    
     /* ------------------------------------------------------------ */
     /* ------------------------------------------------------------ */
     /* ------------------------------------------------------------ */
@@ -817,7 +818,7 @@ public abstract class AbstractConnector extends HttpBuffers implements Connector
 
                 _acceptorThread[_acceptor] = current;
                 name = _acceptorThread[_acceptor].getName();
-                current.setName(name + " - Acceptor" + _acceptor + " " + AbstractConnector.this);
+                current.setName(name + " Acceptor" + _acceptor + " " + AbstractConnector.this);
             }
             int old_priority = current.getPriority();
 

jetty-server/src/main/java/org/eclipse/jetty/server/nio/SelectChannelConnector.java

@@ -77,13 +77,22 @@ public class SelectChannelConnector extends AbstractNIOConnector
     public SelectChannelConnector()
     {
         _manager.setMaxIdleTime(getMaxIdleTime());
+        setAcceptors(Math.max(1,(Runtime.getRuntime().availableProcessors()+3)/4));
     }
 
     /* ------------------------------------------------------------ */
     @Override
     public void accept(int acceptorID) throws IOException
     {
-        _manager.doSelect(acceptorID);
+        ServerSocketChannel server = _acceptChannel;
+        if (server!=null && server.isOpen())
+        {
+            SocketChannel channel = _acceptChannel.accept();
+            channel.configureBlocking(false);
+            Socket socket = channel.socket();
+            configure(socket);
+            _manager.register(channel);
+        }
     }
 
     /* ------------------------------------------------------------ */
@@ -238,30 +247,45 @@ public class SelectChannelConnector extends AbstractNIOConnector
 
         super.doStart();
 
-        // start a thread to accept new connections
-        _manager.dispatch(new Runnable()
+        // start a thread to Select
+        for (int i=0;i<getAcceptors();i++)
         {
-            public void run()
+            final int id=i;
+            _manager.dispatch(new Runnable()
             {
-                final ServerSocketChannel server=_acceptChannel;
-                while (isRunning() && _acceptChannel==server && server.isOpen())
+                public void run()
                 {
+                    String name=Thread.currentThread().getName();
                     try
                     {
-                        SocketChannel channel = server.accept();
-                        channel.configureBlocking(false);
-                        Socket socket = channel.socket();
-                        configure(socket);
-                        _manager.register(channel);
+                        Thread.currentThread().setName(name+" Selector"+id+" "+SelectChannelConnector.this);
+                        while (isRunning())
+                        {
+                            try
+                            {
+                                _manager.doSelect(id);
+                            }
+                            catch(ThreadDeath e)
+                            {
+                                throw e;
+                            }
+                            catch(IOException e)
+                            {
+                                Log.ignore(e);
+                            }
+                            catch(Exception e)
+                            {
+                                Log.warn(e);
+                            }
+                        }
                     }
-                    catch(IOException e)
+                    finally
                     {
-                        Log.ignore(e);
+                        Thread.currentThread().setName(name);
                     }
                 }
-            }
-        });
-
+            });
+        }
     }
 
     /* ------------------------------------------------------------ */