twisted 作为一个经典的异步框架,相对于tornado竟然没有提供官方的多进程模式运行的方法, 看了tornado多进程源码分析一文之后, 尝试了twisted多进行运行的可行性。
代码如下:
1.单进程模式:
from twisted.internet import selectreactor测试结果:
selectreactor.install()
from twisted.internet import reactor
from twisted.web import server,resource
class Urls(resource.Resource):
"Url配置及主项目函数"
def __init__(self):
resource.Resource.__init__(self)
self.putChild("",self)
def render_GET(self,request):
return "home page"
reactor.listenTCP(8080,server.Site(Urls()))
reactor.run()
Concurrency Level: 800
Time taken for tests: 8.961 seconds
Complete requests: 9000
Failed requests: 0
Write errors: 0
Total transferred: 1224000 bytes
HTML transferred: 81000 bytes
Requests per second: 1004.35 [#/sec] (mean)
Time per request: 796.533 [ms] (mean)
Time per request: 0.996 [ms] (mean, across all concurrent requests)
Transfer rate: 133.39 [Kbytes/sec] received
2.多进程模式
from twisted.internet import selectreactor
selectreactor.install()
from twisted.internet import reactor
from twisted.web import server,resource
class Urls(resource.Resource):
"Url配置及主项目函数"
def __init__(self):
resource.Resource.__init__(self)
self.putChild("",self)
def render_GET(self,request):
return "home page"
reactor.listenTCP(8080,server.Site(Urls()))
import os
os.fork()
reactor.run()Concurrency Level: 800
Time taken for tests: 4.313 seconds
Complete requests: 9000
Failed requests: 0
Write errors: 0
Total transferred: 1224272 bytes
HTML transferred: 81018 bytes
Requests per second: 2086.77 [#/sec] (mean)
Time per request: 383.367 [ms] (mean)
Time per request: 0.479 [ms] (mean, across all concurrent requests)
Transfer rate: 277.21 [Kbytes/sec] received
添加了 os.fork()之后 程序可以获得 2倍左右的并发性能, 然而 在 之前的并发能力仅仅为1000. 可见,可以利用fork进程的方法让twisted程序直接运行在多进程模式下, 以此获得N倍的并发能力。(据说有可能会产生惊群现象,会消耗一部分性能,nginx优雅的处理了这个问题。 。 暂且无视这个问题吧。。。 )