使用了多进程的gevent服务器，可以用来改进一些IO密集型操作的性能

multicore_gevent.py

import sys
from gevent import server
from gevent import monkey
monkey.patch_os()
from multiprocessing import Process, current_process, cpu_count


def eat_cpu():
    for i in xrange(100000):
        pass


def note(format, *args):
    sys.stderr.write('[%s]\t%s\n' % (current_process().name, format % args))


def echo(socket, address):
    print 'New connection from %s:%s' % address
    print 'on %s' % current_process().name
    eat_cpu()
    fileobj = socket.makefile()
    fileobj.write('HTTP/1.1 200 OK\n\nHello World!!')

s = server.StreamServer(('127.0.0.1', 8001), echo)
s.init_socket()


def serve_forever(server):
    note('starting server')
    try:
        server.start_accepting()
        try:
            server._stop_event.wait()
        except:
            raise
    except KeyboardInterrupt:
        pass

number_of_processes = cpu_count() - 1
print 'Starting %s processes' % number_of_processes
for i in range(number_of_processes):
    Process(target=serve_forever, args=(s,)).start()

s.serve_forever()