Re: Futex hang when running event loop on a separated thread

From	Marc Aymerich <glicerinu@gmail.com>
Newsgroups	comp.lang.python
Subject	Re: Futex hang when running event loop on a separated thread
Date	2015-11-25 15:10 +0100
Message-ID	<mailman.74.1448460653.20593.python-list@python.org> (permalink)
References	(1 earlier) <CA+DCN_vp8nFS-gOrQMYYefhVt2W0oAP+rFcKQbQ7K+hOHwvuuQ@mail.gmail.com> <CAKJDb-MY9W518kKhFf8vbZAfFad=uGXefDePf1KLpUJV9H3Rpg@mail.gmail.com> <CA+DCN_uC2k=rJxmtfEideAhGj1=2XVq8VHGU=OUkB9yHxV7bPw@mail.gmail.com> <CAKJDb-N5WD_cN2k0kd_aXXyj_2Bsjxye8Q34_3awtw7bGPRx5w@mail.gmail.com> <CA+DCN_uNHNHrBOSmd0JE58Ltt6HzrDWU_DhW_1N3dFMAVNpVOQ@mail.gmail.com>

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On Tue, Nov 24, 2015 at 9:17 PM, Marc Aymerich <glicerinu@gmail.com> wrote:
> On Tue, Nov 24, 2015 at 8:41 PM, Zachary Ware
> <zachary.ware+pylist@gmail.com> wrote:
>> On Tue, Nov 24, 2015 at 12:37 PM, Marc Aymerich <glicerinu@gmail.com> wrote:
>>> still it appears to work only if the main thread is in the foreground
>>> (as of calling Thread() with deamon=True), I don't get why it behaves
>>> differently :( maybe it is waiting for other stuff, but no idea how to
>>> confirm this with strace of other means.. i always see the same
>>> 'futex(0x7f9a70000c10, FUTEX_WAIT_PRIVATE, 0, NULL'
>>
>> What's your exact version of Python?  asyncio is still evolving
>> rapidly, and may behave differently between patch releases (say,
>> between 3.4.1 and 3.4.3).
>>
>> I have tried out your reproducer with my fix, and I can't provoke a
>> hang using Python 3.4.3 on either OSX or Ubuntu Trusty.  Can you give
>> some more specific directions to reproduce?
>>
>> --
>> Zach
>> --
>> https://mail.python.org/mailman/listinfo/python-list
>
>
> Yep, I'm a bit lost about how fuse implements going into background...
> so the only way I have to reproduce this so far is by using fuse :(


problem solved !
Just found out that threads should be started by fuse.init() in order
to run when fuse is backgrounded.


-- 
Marc

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Re: Futex hang when running event loop on a separated thread Marc Aymerich <glicerinu@gmail.com> - 2015-11-25 15:10 +0100

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