From: npostavs@users.sourceforge.net
To: aiken <acairncross@gmail.com>
Cc: clement.pit@gmail.com, 24091@debbugs.gnu.org
Subject: bug#24091: 24.5; High CPU usage at startup while hidden
Date: Thu, 28 Jul 2016 21:45:55 -0400 [thread overview]
Message-ID: <87shut9pyk.fsf@users.sourceforge.net> (raw)
In-Reply-To: <c6b6ea8a-e1fe-828b-8974-e59e95832bdb@gmail.com> (aiken's message of "Thu, 28 Jul 2016 18:43:38 +0100")
tags 24091 confirmed
found 24091 25.1-rc1
quit
aiken <acairncross@gmail.com> writes:
> Noam: I think my settings are fairly standard, but another way to
> reproduce the effect of Emacs launching in a workspace that you're not
> currently in (which seems to be the main issue) is to add something like
> "assign [class="Emacs24"] 9" to your i3 config. (I've tried this and it
> does reproduce the high CPU usage.)
Thanks, with this I'm able to reproduce also with the latest emacs-25.
I sent SIGSTOP to get a backtrace and found it was in
x_make_frame_visible (src/xterm.c).
Stepping through it with gdb, I saw it's getting stuck in this loop:
/* Process X events until a MapNotify event has been seen. */
while (!FRAME_VISIBLE_P (f))
{
/* Force processing of queued events. */
x_sync (f);
/* If on another desktop, the deiconify/map may be ignored and the
frame never becomes visible. XMonad does this.
Prevent an endless loop. */
if (FRAME_ICONIFIED_P (f) && ++tries > 100)
break;
/* This hack is still in use at least for Cygwin. See
http://lists.gnu.org/archive/html/emacs-devel/2013-12/msg00351.html.
Machines that do polling rather than SIGIO have been
observed to go into a busy-wait here. So we'll fake an
alarm signal to let the handler know that there's something
to be read. We used to raise a real alarm, but it seems
that the handler isn't always enabled here. This is
probably a bug. */
if (input_polling_used ())
{
/* It could be confusing if a real alarm arrives while
processing the fake one. Turn it off and let the
handler reset it. */
int old_poll_suppress_count = poll_suppress_count;
poll_suppress_count = 1;
poll_for_input_1 ();
poll_suppress_count = old_poll_suppress_count;
}
if (XPending (FRAME_X_DISPLAY (f)))
{
XEvent xev;
XNextEvent (FRAME_X_DISPLAY (f), &xev);
x_dispatch_event (&xev, FRAME_X_DISPLAY (f));
}
}
I guess we would like Emacs to hit this case:
/* If on another desktop, the deiconify/map may be ignored and the
frame never becomes visible. XMonad does this.
Prevent an endless loop. */
if (FRAME_ICONIFIED_P (f) && ++tries > 100)
break;
But it seems that FRAME_ICONIFIED_P is returning false, because I see
that tries is never incremented.
next prev parent reply other threads:[~2016-07-29 1:45 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-27 23:11 bug#24091: 24.5; High CPU usage at startup while hidden aiken
2016-07-27 23:32 ` Noam Postavsky
2016-07-28 2:16 ` Clément Pit--Claudel
2016-07-28 17:43 ` aiken
2016-07-28 19:37 ` Clément Pit--Claudel
2016-07-28 20:21 ` aiken
2016-07-29 1:45 ` npostavs [this message]
2016-07-29 5:46 ` Eli Zaretskii
2016-07-30 13:54 ` Noam Postavsky
2016-07-30 15:41 ` Eli Zaretskii
2016-08-13 23:57 ` npostavs
2016-08-16 2:38 ` Eli Zaretskii
2016-09-03 17:29 ` Noam Postavsky
2016-09-03 17:45 ` Eli Zaretskii
2016-09-03 17:53 ` Noam Postavsky
2016-09-03 18:35 ` Eli Zaretskii
2016-09-03 18:40 ` Noam Postavsky
2016-09-03 18:51 ` Eli Zaretskii
2016-09-03 20:03 ` Noam Postavsky
2016-09-04 7:33 ` martin rudalics
2016-09-04 12:35 ` Noam Postavsky
2016-09-04 13:15 ` martin rudalics
2016-09-04 13:40 ` Noam Postavsky
2016-09-04 15:56 ` martin rudalics
2016-09-04 16:21 ` Noam Postavsky
2016-09-06 16:05 ` Eli Zaretskii
2017-01-13 10:19 ` Dominik Schrempf
2017-01-14 1:38 ` npostavs
2017-01-14 7:52 ` Eli Zaretskii
2017-01-16 23:36 ` Ken Raeburn
2017-01-17 3:40 ` Eli Zaretskii
2017-01-18 2:21 ` npostavs
2017-01-20 5:16 ` Ken Raeburn
2017-01-21 4:54 ` npostavs
2017-01-23 17:14 ` Dominik Schrempf
2017-10-26 17:22 ` bug#24091: Problem caused by the fix for this bug Ken Brown
2017-10-26 17:42 ` Noam Postavsky
2017-10-26 18:12 ` Ken Brown
2017-10-26 20:40 ` Noam Postavsky
2017-10-27 14:11 ` Ken Brown
2017-10-27 17:26 ` Eli Zaretskii
2017-10-27 17:53 ` Ken Brown
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