Question

我正在使用epoll reactor和示例HTTP代理实现。

从另一个进程每秒执行~30个HTTP请求，扭曲进程占用10％cpu

探查器输出为：

         937706 function calls (934675 primitive calls) in 59.988 CPU seconds

   Ordered by: cumulative time
   List reduced from 312 to 15 due to restriction <15>

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    0.000    0.000   59.988   59.988 base.py:1167(run)
        1    0.076    0.076   59.988   59.988 base.py:1172(mainLoop)
    12697   55.456    0.004   59.253    0.005 epollreactor.py:169(doPoll)
    13553    0.086    0.000    3.797    0.000 log.py:71(callWithLogger)
    13553    0.096    0.000    3.691    0.000 log.py:66(callWithContext)
    13553    0.047    0.000    3.481    0.000 context.py:117(callWithContext)
    13553    0.067    0.000    3.426    0.000 context.py:61(callWithContext)
    13552    0.095    0.000    3.359    0.000 posixbase.py:544(_doReadOrWrite)
     5454    0.097    0.000    1.736    0.000 tcp.py:182(doRead)
     5453    0.167    0.000    1.639    0.000 basic.py:543(dataReceived)
    12697    0.095    0.000    0.587    0.000 base.py:762(runUntilCurrent)
     4453    0.025    0.000    0.574    0.000 http.py:495(rawDataReceived)
     6000    0.036    0.000    0.547    0.000 http.py:1515(lineReceived)
     2000    0.029    0.000    0.454    0.000 tcp.py:371(doConnect)
     5098    0.104    0.000    0.428    0.000 abstract.py:212(doWrite)


         937706 function calls (934675 primitive calls) in 59.988 CPU seconds

   Ordered by: internal time
   List reduced from 312 to 15 due to restriction <15>

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
    12697   55.456    0.004   59.253    0.005 epollreactor.py:169(doPoll)
    59101    0.277    0.000    0.277    0.000 <string>:1(fileno)
     5098    0.252    0.000    0.252    0.000 tcp.py:212(writeSomeData)
    24453    0.198    0.000    0.198    0.000 __init__.py:1230(getEffectiveLevel)
     5453    0.167    0.000    1.639    0.000 basic.py:543(dataReceived)
     5098    0.104    0.000    0.428    0.000 abstract.py:212(doWrite)
     5454    0.097    0.000    1.736    0.000 tcp.py:182(doRead)
    13553    0.096    0.000    3.691    0.000 log.py:66(callWithContext)
    12697    0.095    0.000    0.587    0.000 base.py:762(runUntilCurrent)
    13552    0.095    0.000    3.359    0.000 posixbase.py:544(_doReadOrWrite)
    13553    0.086    0.000    3.797    0.000 log.py:71(callWithLogger)
        1    0.076    0.076   59.988   59.988 base.py:1172(mainLoop)
    16556    0.074    0.000    0.074    0.000 context.py:86(getContext)
    17451    0.073    0.000    0.094    0.000 epollreactor.py:71(_add)
    17098    0.068    0.000    0.085    0.000 epollreactor.py:112(_remove)

有什么问题？为什么扭曲的性能在这里很差？

正在测试的源代码

import hotshot, hotshot.stats

from twisted.internet import epollreactor
epollreactor.install()

from twisted.internet import reactor
from twisted.web import http
from twisted.web.proxy import Proxy

factory = http.HTTPFactory()
factory.protocol = Proxy

reactor.listenTCP(18001, factory)

reactor.callLater(60, reactor.stop)
prof = hotshot.Profile("stones.prof")
prof.start()
reactor.run()
prof.close()

扭曲的反应堆CPU使用情况

0 个答案: