[Twisted-Python] Strange behaviour for epoll reactor
adelagon at gmail.com
Tue Dec 11 20:56:44 EST 2007
To summarize Jean-Paul's link, you can just a two-liner patch in the
epollreactor.py to fix this (after line 201 if you're using the
if event & _epoll.HUP or event & _epoll.ERR:
why = main.CONNECTION_LOST
On Dec 11, 2007 9:57 PM, Jean-Paul Calderone <exarkun at divmod.com> wrote:
> On Tue, 11 Dec 2007 15:06:45 +0200, Mustafa Sakalsiz <sakalsiz at gmail.com>
> >We have a twisted application uses the epoll reactor. Sometimes it
> >wastes %100 cpu. It has also some threads for single isolated
> >functions (using deferToThred). First we suspected that threads don't
> >end and goes to an infinite loop. Because application still accepts
> >connections and executes the requested functions. Then I ran the
> >following ps command
> >ps h -Leo pid,pcpu,args,lwp
> >Looking at the output, the main thread seemed to be wasting the whole
> >cpu time. Later on I attached the process to the strace and saw the
> >output below. I don't how does it happen or when does it happen. It is
> >not regular nor repeatable, but this is the strace output when it gets
> >into loop. I send to the list, because it may be useful for someone.
> >Now we switched back to the select reactor.
> >P.S.: We use perspective broker on the server side and qt4reactor for
> >the client.
> This sounds like this issue:
> This is fixed in current trunk at HEAD and the fix will be included in the
> next release of Twisted.
> Twisted-Python mailing list
> Twisted-Python at twistedmatrix.com
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