dramatically improve the gevent worker.

gunicorn/workers/ggevent.py

@@ -13,9 +13,8 @@
 import gevent
 from gevent import monkey
 monkey.noisy = False
-from gevent import core
-from gevent import greenlet
 from gevent.pool import Pool
+from gevent.server import StreamServer
 from gevent import pywsgi, wsgi
 
 import gunicorn
@@ -34,17 +33,24 @@
     'wsgi.run_once': False
 }
 
+
+class GGeventServer(StreamServer):
+    def __init__(self, listener, handle, spawn='defaul', worker=None):
+        StreamServer.__init__(self, listener, spawn=spawn)
+        self.handle_func = handle
+        self.worker = worker
+
+    def stop(self):
+        super(GGeventServer, self).stop()
+        self.worker.alive = False
+
+    def handle(self, sock, addr):
+        self.handle_func(sock, addr)
+
 class GeventWorker(AsyncWorker):
 
-    min_delay = 0.01
-    max_delay = 1
-
     def __init__(self, *args, **kwargs):
         super(GeventWorker, self).__init__(*args, **kwargs)
-        self.pool = None
-        self._accept_event = None
-        self._acceptor_timer = None
-        self.delay = self.min_delay
 
     @classmethod  
     def setup(cls):
@@ -53,90 +59,34 @@ def setup(cls):
 
     def timeout_ctx(self):
         return gevent.Timeout(self.cfg.keepalive, False)
-
-    def acceptor(self):
-        if self._accept_event is None:
-            self._accept_event = core.read_event(self.socket.fileno(), self._do_accept, persist=True)
-
-
-    def _acceptor(self, event):
-        if self._accept_event is None:
-            if not self.alive:
-                return
-
-            # create a read event
-            self._accept_event = core.read_event(self.socket.fileno(), self._do_accept, persist=True)
-
-    def _do_accept(self, event, _evtype):
-        try:
-            try:
-                conn, addr = self.socket.accept()
-            except socket.error, e:
-                if e[0] == errno.EAGAIN:
-                    sys.exc_clear()
-                    return
-                raise
-
-            self.delay = self.min_delay
-            self.pool.spawn(self.handle, conn, addr)
-        except socket.error, e:
-            if e[0] not in (errno.EBADF, errno.EINVAL, errno.ENOTSOCK):
-                self.alive = False
-                return
-        except:
-            self.log.exception("Unexpected error in acceptor. Sepuku.")
-            self.stop()
-            return
-
-        if self.delay >= 0:
-            self.stop_acceptor()
-            self._start_accepting_timer = core.timer(self.delay,
-                    self.acceptor)
-            self.delay = min(self.max_delay, self.delay*2)
-
-    def stop_acceptor(self):
-        if self._accept_event is not None:
-            self._accept_event.cancel()
-            self._accept_event = None
-
-        if self._acceptor_timer is not None:
-            self._acceptor_timer.cancel()
-            self.acceptor_timer = None
-
-    def stop(self):
-        self.stop_acceptor()
-        self.pool.join(timeout=self.timeout)
-        self.pool.kill(block=True, timeout=1)
-        self.alive = False
 
     def run(self):
         self.socket.setblocking(1)
 
-        # start to accept
-        self.acceptor()
-
-        # enter in the main loop
+        pool = Pool(self.worker_connections)
+        server = GGeventServer(self.socket, self.handle, spawn=pool,
+                worker=self)
+
+        server.start()
+
         try:
             while self.alive:
-                gevent.spawn(self.notify)
+                self.notify()
                 if self.ppid != os.getppid():
                     self.log.info("Parent changed, shutting down: %s" % self)
                     break
                 gevent.sleep(self.timeout)
         except:
             pass
-        self.stop()
+
+        with gevent.Timeout(self.timeout, False):
+            gevent.spawn(server.stop).join()
 
     def init_process(self):
         #gevent doesn't reinitialize dns for us after forking
         #here's the workaround
         gevent.core.dns_shutdown(fail_requests=1)
         gevent.core.dns_init()
-
-        # init the pool 
-        self.pool = Pool(self.worker_connections)
-        self.pool._semaphore.rawlink(self._acceptor)
-
         super(GeventWorker, self).init_process()
 
 class GeventBaseWorker(Worker):
@@ -176,11 +126,11 @@ def run(self):
                     server.stop()
                     break
                 gevent.sleep(0.1) 
-            self.pool.join(timeout=self.timeout)
-            self.pool.kill(block=True, timeout=1)
         except KeyboardInterrupt:
             pass
-
+
+        with gevent.Timeout(self.timeout, False):
+            gevent.spawn(server.stop).join()
 
 class WSGIHandler(wsgi.WSGIHandler):
     def log_request(self, *args):