Added debug control over exceptions in greenpool, benchmarks directory.

benchmarks/__init__.py

@@ -0,0 +1,24 @@
+import gc
+import timeit
+import random
+    
+def measure_best(repeat, iters, 
+                 common_setup='pass', 
+                 common_cleanup='pass',
+                 *funcs):
+    funcs = list(funcs)
+    results = dict([(f,[]) for f in funcs])
+
+    for i in xrange(repeat):
+        random.shuffle(funcs)
+        for func in funcs:
+            gc.collect()
+            t = timeit.Timer(func, setup=common_setup)
+            results[func].append(t.timeit(iters))
+            common_cleanup()
+    
+    best_results = {}
+    for func, times in results.iteritems():
+        best_results[func] = min(times)
+    return best_results
+    

benchmarks/localhost_socket.py

@@ -0,0 +1,100 @@
+"""Benchmark evaluating eventlet's performance at speaking to itself over a localhost socket."""
+
+import time
+import benchmarks
+
+BYTES=1000
+SIZE=1
+CONCURRENCY=50
+
+def reader(sock):
+    expect = BYTES
+    while expect > 0:
+        d = sock.recv(min(expect, SIZE))
+        expect -= len(d)
+            
+def writer(addr, socket_impl):
+    sock = socket_impl(socket.AF_INET, socket.SOCK_STREAM)
+    sock.connect(addr)
+    sent = 0
+    while sent < BYTES:
+        d = 'xy' * (max(min(SIZE/2, BYTES-sent), 1))
+        sock.sendall(d)
+        sent += len(d)
+        
+        
+def green_accepter(server_sock, pool):
+    for i in xrange(CONCURRENCY):
+        sock, addr = server_sock.accept()
+        pool.spawn_n(reader, sock)
+
+def heavy_accepter(server_sock, pool):
+    for i in xrange(CONCURRENCY):
+        sock, addr = server_sock.accept()
+        t = threading.Thread(None, reader, "reader thread", (sock,))
+        t.start()
+        pool.append(t)
+
+import eventlet.green.socket
+import eventlet
+
+from eventlet import debug
+debug.hub_exceptions(True)
+
+def launch_green_threads():
+    pool = eventlet.GreenPool(CONCURRENCY * 2 + 1)
+    server_sock = eventlet.green.socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    server_sock.bind(('localhost', 0))
+    server_sock.listen(50)
+    addr = ('localhost', server_sock.getsockname()[1])
+    pool.spawn_n(green_accepter, server_sock, pool)
+    for i in xrange(CONCURRENCY):
+        pool.spawn_n(writer, addr, eventlet.green.socket.socket)
+    pool.waitall()
+       
+import threading
+import socket       
+    
+def launch_heavy_threads():
+    threads = []
+    server_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    server_sock.bind(('localhost', 0))
+    server_sock.listen(50)
+    addr = ('localhost', server_sock.getsockname()[1])
+    accepter_thread = threading.Thread(None, heavy_accepter, "accepter thread", (server_sock, threads))
+    accepter_thread.start()
+    threads.append(accepter_thread)
+    for i in xrange(CONCURRENCY):
+        client_thread = threading.Thread(None, writer, "writer thread", (addr, socket.socket))
+        client_thread.start()
+        threads.append(client_thread)
+    for t in threads:
+        t.join()
+
+
+if __name__ == "__main__":
+    import optparse
+    parser = optparse.OptionParser()
+    parser.add_option('--compare-threading', action='store_true', dest='threading', default=False)
+    parser.add_option('-b', '--bytes', type='int', dest='bytes', 
+                      default=BYTES)
+    parser.add_option('-s', '--size', type='int', dest='size', 
+                      default=SIZE)
+    parser.add_option('-c', '--concurrency', type='int', dest='concurrency', 
+                      default=CONCURRENCY)
+    
+    opts, args = parser.parse_args()
+    BYTES=opts.bytes
+    SIZE=opts.size
+    CONCURRENCY=opts.concurrency
+    
+    funcs = [launch_green_threads]
+    if opts.threading:
+        funcs = [launch_green_threads, launch_heavy_threads]
+    results = benchmarks.measure_best(3, 3,
+                                      lambda: None, lambda: None,
+                                      *funcs)
+    print "green:", results[launch_green_threads]
+    if opts.threading:
+        print "threads:", results[launch_heavy_threads]
+        print "%", (results[launch_green_threads]-results[launch_heavy_threads])/results[launch_heavy_threads] * 100

benchmarks/spawn.py

@@ -0,0 +1,56 @@
+"""Compare spawn to spawn_n"""
+
+import eventlet
+import benchmarks
+
+def dummy(i=None):
+    return i
+
+def run_spawn():
+    eventlet.spawn(dummy, 1)
+        
+def run_spawn_n():
+    eventlet.spawn_n(dummy, 1)
+
+def run_spawn_n_kw():
+    eventlet.spawn_n(dummy, i=1)
+
+def cleanup():
+    eventlet.sleep(0.2)
+
+iters = 10000
+best = benchmarks.measure_best(5, iters,
+    'pass',
+    cleanup,
+    run_spawn_n, 
+    run_spawn,
+    run_spawn_n_kw)
+print "eventlet.spawn", best[run_spawn]
+print "eventlet.spawn_n", best[run_spawn_n]
+print "eventlet.spawn_n(**kw)", best[run_spawn_n_kw]
+print "%% %0.1f" % ((best[run_spawn]-best[run_spawn_n])/best[run_spawn_n] * 100)
+
+pool = None
+def setup():
+    global pool
+    pool = eventlet.GreenPool(iters)
+
+def run_pool_spawn():
+    pool.spawn(dummy, 1)
+        
+def run_pool_spawn_n():
+    pool.spawn_n(dummy, 1)
+    
+def cleanup_pool():
+    pool.waitall()
+    
+
+best = benchmarks.measure_best(3, iters,
+    setup,
+    cleanup_pool,
+    run_pool_spawn, 
+    run_pool_spawn_n,
+)
+print "eventlet.GreenPool.spawn", best[run_pool_spawn]
+print "eventlet.GreenPool.spawn_n", best[run_pool_spawn_n]
+print "%% %0.1f" % ((best[run_pool_spawn]-best[run_pool_spawn_n])/best[run_pool_spawn_n] * 100)

eventlet/debug.py

@@ -92,6 +92,8 @@ def hub_exceptions(state):
     """
     from eventlet import hubs
     hubs.get_hub().set_timer_exceptions(state)
+    from eventlet import greenpool
+    greenpool.DEBUG = state
     
 def tpool_exceptions(state):
     """Toggles whether tpool itself prints exceptions that are raised from 

eventlet/greenpool.py

@@ -9,6 +9,8 @@ from eventlet.support import greenlets as greenlet
 
 __all__ = ['GreenPool', 'GreenPile']
 
+DEBUG = False
+                
 try:
     next
 except NameError:
@@ -88,9 +90,8 @@ class GreenPool(object):
             except (KeyboardInterrupt, SystemExit, greenlet.GreenletExit):
                 raise
             except:
-                # TODO control this with debug module
-                #traceback.print_exc()
-                pass
+                if DEBUG:
+                    traceback.print_exc()
         finally:
             if coro is None:
                 return