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Comment by alexk | Hacker News Reader

What version of twisted and os you were using? I'm asking because all latest Twisted releases are using epoll by default.

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It's worth noting that PyPy also supports epoll (and kqueue), and has for a few versions.

I remember looking at that, but Twisted's epoll reactor was a C extension at the time. It looks like Twisted 12.1.0 switched to using the epoll provided by the Python base library, but that was released about a year after I was originally installing this daemon (and I was installing everything from apt, so add another year to the age of the packages I got).

This was with Twisted 10.1.0 and Python 2.6.6. I remember being in extreme disbelief when I found that it was using select/poll instead of epoll (who does that, especially when they already have epoll support?). I ended up writing this:

  for reactor in ["epoll", "kq"]:
      try:
          rn = reactor + "reactor"
          getattr(__import__("twisted.internet", fromlist=[rn], rn).install()
          print "Auto-selecting reactor: " + reactor
          break
      except ImportError:
          pass

A couple of years back when I was deploying twisted using Debian packages, it was not using epoll by default.

Yep, this was on a Debian 6.0.2 install, with packages from apt.

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