Mailman 3 March 2011 - Twisted

[Twisted-Python] ANN: Fusion v0.3, a C++ integration layer for Twisted
by Itamar Turner-Trauring March 4, 2011

March 4, 2011

Fusion allows you to implement protocols for TCP and UDP in C++, minimizing data copying and function call overhead. Most people should just stick to Python, of course :) Note that I have no code that uses this version of Fusion, and unit tests (while next on my very theoretical todo list) do not yet exist, so use with caution -- I'd love to hear success stories from anyone who is using it. v0.3 fixes a memory leak, and also allows Fusion to build on modern versions of Python and modern compilers. I built it with Python 2.6 and boost::python v1.40, but it should work with other versions as well. http://itamarst.org/software/fusion-0.3.0.tar.gz (homepage of sorts at http://itamarst.org/software/). -Itamar

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[Twisted-Python] Question regarding the working of twisted python with celery
by Dinesh Kapoor March 3, 2011

March 3, 2011

Hi, I have run into a weird performance issue while working with twisted and using celery to schedule tasks on it. Here is my setup: 1. Celery schedules a task which makes a TCP connection to a server running FreeSwitch 2. Celery is running with concurrency = 2. 3. I have changed my code so that I call reactor.callfromthread for all reactor based work. 4. A lot of times once I schedule the celery task, I get delays ranging from 3 - 30 seconds when I am running with Celery concurrency =2. 5. If I reduce the celery concurrency to 1, then everything works great! 6. Upon debugging it a little bit more, it seems that the selectReactor's doSelect is where the code is getting stuck on the select(). I dont know how to get around the delay, and I dont know who is causing that delay exactly. If there is more info that is needed then please let me know. Everything works fine when the Celery worker process is 1, but delay starts happening invariably when celery's worker processes >=2. Any help would be great! Regards, Dinesh

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[Twisted-Python] PyCon 2011 Twisted Sprint
by exarkun＠twistedmatrix.com March 3, 2011

March 3, 2011

Hello all, Once again, we will be sprinting at PyCon. I've just added Twisted to <http://us.pycon.org/2011/sprints/projects/>. If you plan to attend (for any amount of time), please add your name to the attendees list. Also feel free to suggest additional sprint topics. We won't really limit sprint topics to things planned in advance, but adding particular things to the list is a probably a good way to attract more sprinters and let people do any background research that might be necessary before the sprint actually starts. Jean-Paul

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