[Twisted-Python] dramatic slowdown in pbbenchclient.py / pbbenchserver.py
russt at agilityfund.com
Wed Jan 26 13:48:48 EST 2005
Hello, there's a dramatic slowdown in the number of calls per second in
the pbbenchclient.py / pbbenchserver.py programs
(http://twistedmatrix.com/documents/current/examples/) if I just change
the number of deferred calls from two to three, and make the connection
between two different computers. With the stock program, I get around
900 cps, with the modified one, I get around 5 cps. I'm a newbie, so
maybe something is going on that I'm not understanding. Anyway, here
are the pseudo-diffs in pbbenchclient.py:
<< hostname = 'localhost'
>> hostname = '192.168.0.2'
<< d1 = self.persp.callRemote("simple")
<< d2 = self.persp.callRemote("complexTypes")
>> l=[self.persp.callRemote("simple") for x in range(3)]
The slowdown only appears between two different computers. If I run it
on a single computer I get 700 cps. If I run it between two separate
computers but with one or two simultaneous deferreds, then there's only
a very minor slowdown. I'm running on windows 2000 with
What do you think? Is this a strange behaviour of twisted or is there
something screwed up with my networking?
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