From: Lars Magne Ingebrigtsen <larsi@gnus.org>
To: emacs-devel@gnu.org
Subject: Odd possibly TLS-related network hang
Date: Tue, 13 Aug 2013 22:31:41 +0200 [thread overview]
Message-ID: <m37gfpib82.fsf@stories.gnus.org> (raw)
If I eval the following, Emacs hangs hard for five seconds:
(progn
(url-retrieve "https://f.cloud.github.com/assets/54012/955557/7ed1352e-042c-11e3-91ec-8e27c707a011.png" 'ignore)
(url-retrieve "https://f.cloud.github.com/assets/54012/955360/3e5f0672-0429-11e3-8cfd-28a1ede5f5ef.png" 'ignore))
strace tells me the following is happening:
[pid 13635] recvfrom(22, 0x7af24e0, 5, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid 13635] recvfrom(22, 0x7af24e0, 5, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid 13635] recvfrom(22, 0x7af24e0, 5, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid 13635] recvfrom(22, 0x7af24e0, 5, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid 13635] recvfrom(22, 0x7af24e0, 5, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid 13635] recvfrom(22, 0x7af24e0, 5, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid 13635] recvfrom(22, 0x7af24e0, 5, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid 13635] recvfrom(22, 0x7af24e0, 5, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid 13635] recvfrom(22, 0x7af24e0, 5, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
[ a lot of snippage ]
Until it finally gets something:
[pid 13635] recvfrom(22, "\26\3\3\0Q", 5, 0, NULL, NULL) = 5
Looking at the code, it shouldn't be busy-waiting if it gets an EAGAIN,
should it? At least it didn't use to... Hm...
--
(domestic pets only, the antidote for overdose, milk.)
No Gnus T-Shirt for sale: http://ingebrigtsen.no/no.php
and http://lars.ingebrigtsen.no/2013/08/twenty-years-of-september.html
reply other threads:[~2013-08-13 20:31 UTC|newest]
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