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bug#10404: [PATCH] Power: sleep longer than two seconds at a time
From: |
Lars Ingebrigtsen |
Subject: |
bug#10404: [PATCH] Power: sleep longer than two seconds at a time |
Date: |
Thu, 25 Feb 2016 16:50:36 +1030 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux) |
Glenn Morris <rgm@gnu.org> writes:
> Comments from Jan in
> http://lists.gnu.org/archive/html/emacs-devel/2013-07/msg00540.html
>
> I don't know, I haven't seen this 2 second polling that is mentioned
> (with strace/dtruss). When the cursor stops blinking, there is a 30
> second timeout, and after that a very long timeout (thousands of
> seconds, I don't have the exact value). But on the other hand, I was
> not running Lisp at the time.
>
> I don't know where that leaves this patch.
> (See also comments in http://debbugs.gnu.org/10404#11 )
If I start "emacs -Q" and strace it, I see basically the following every
couple of seconds.
[pid 8439] --- SIGIO {si_signo=SIGIO, si_code=SI_KERNEL} ---
[pid 8439] rt_sigreturn() = 1
[pid 8439] recvmsg(9, {msg_name(0)=NULL, msg_iov(1)=[{"\241
\33\f\263\0\340\3!\1\0\0.\1\0\0000\5\0\0\263\0\340\3\0\0\0\0\0\0\0\0", 4096}],
msg_controllen=0, msg_flags=0}, 0) = 32
[pid 8439] recvmsg(9, 0x7ffda37f3120, 0) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 8439] poll([{fd=6, events=POLLIN}, {fd=8, events=POLLIN}, {fd=9,
events=POLLIN}, {fd=13, events=POLLIN}], 4, 0) = 0 (Timeout)
[pid 8439] poll([{fd=6, events=POLLIN}, {fd=8, events=POLLIN}, {fd=9,
events=POLLIN}, {fd=13, events=POLLIN}], 4, 0) = 0 (Timeout)
[pid 8439] poll([{fd=9, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=9,
revents=POLLOUT}])
[pid 8439] writev(9, [{"\31\0\v\0\366\0\0\0\0\0\30\0!
\0\0\366\0\0\0!\1\0\0.\1\0\0000\5\0\0"..., 44}, {NULL, 0}, {"", 0}], 3) = 44
[pid 8439] recvmsg(9, 0x7ffda37f2ff0, 0) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 8439] recvmsg(9, 0x7ffda37f3120, 0) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 8439] poll([{fd=6, events=POLLIN}, {fd=8, events=POLLIN}, {fd=9,
events=POLLIN}, {fd=13, events=POLLIN}], 4, 0) = 0 (Timeout)
[pid 8439] recvmsg(9, 0x7ffda37f3340, 0) = -1 EAGAIN (Resource temporarily
unavailable)
[pid 8439] poll([{fd=6, events=POLLIN}, {fd=8, events=POLLIN}, {fd=9,
events=POLLIN}, {fd=13, events=POLLIN}], 4, 0) = 0 (Timeout)
[pid 8439] pselect6(14, [6 8 9 13], [], NULL, {100000, 0}, {NULL, 8}) = 1 (in
[9], left {99998, 551877999})
So something is polling and stuff on Linux, at least...
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
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