* bug#39099: 26.3; display-time delay after PC sleep
@ 2020-01-12 13:42 ynyaaa
2020-01-23 5:08 ` Stefan Kangas
0 siblings, 1 reply; 8+ messages in thread
From: ynyaaa @ 2020-01-12 13:42 UTC (permalink / raw)
To: 39099
Enabling display-time, the time string is updated every 0 second.
If PC is awaked after sleep, the update timing is changed.
In GNU Emacs 26.3 (build 1, x86_64-w64-mingw32)
of 2019-08-29 built on CIRROCUMULUS
Repository revision: 96dd0196c28bc36779584e47fffcca433c9309cd
Windowing system distributor 'Microsoft Corp.', version 6.3.9600
Recent messages:
Configured using:
'configure --without-dbus --host=x86_64-w64-mingw32
--without-compress-install 'CFLAGS=-O2 -static -g3''
Configured features:
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TOOLKIT_SCROLL_BARS THREADS LCMS2
Important settings:
value of $LANG: JPN
locale-coding-system: cp932
Major mode: Emacs-Lisp
Minor modes in effect:
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global-font-lock-mode: t
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^ permalink raw reply [flat|nested] 8+ messages in thread
* bug#39099: 26.3; display-time delay after PC sleep
2020-01-12 13:42 bug#39099: 26.3; display-time delay after PC sleep ynyaaa
@ 2020-01-23 5:08 ` Stefan Kangas
2020-01-23 9:47 ` ynyaaa
0 siblings, 1 reply; 8+ messages in thread
From: Stefan Kangas @ 2020-01-23 5:08 UTC (permalink / raw)
To: ynyaaa; +Cc: 39099
ynyaaa@gmail.com writes:
> Enabling display-time, the time string is updated every 0 second.
> If PC is awaked after sleep, the update timing is changed.
>
> In GNU Emacs 26.3 (build 1, x86_64-w64-mingw32)
> of 2019-08-29 built on CIRROCUMULUS
> Repository revision: 96dd0196c28bc36779584e47fffcca433c9309cd
> Windowing system distributor 'Microsoft Corp.', version 6.3.9600
Do you see this when running under "emacs -Q"?
What is the value of the `display-time-format' variable?
Do you mean that it updates every second before sleep?
How often does it update after you awaken after sleep?
Best regards,
Stefan Kangas
^ permalink raw reply [flat|nested] 8+ messages in thread
* bug#39099: 26.3; display-time delay after PC sleep
2020-01-23 5:08 ` Stefan Kangas
@ 2020-01-23 9:47 ` ynyaaa
2020-01-23 14:39 ` Stefan Kangas
2021-08-30 1:40 ` Lars Ingebrigtsen
0 siblings, 2 replies; 8+ messages in thread
From: ynyaaa @ 2020-01-23 9:47 UTC (permalink / raw)
To: Stefan Kangas; +Cc: 39099
Stefan Kangas <stefan@marxist.se> writes:
> ynyaaa@gmail.com writes:
>
>> Enabling display-time, the time string is updated every 0 second.
>> If PC is awaked after sleep, the update timing is changed.
>>
>> In GNU Emacs 26.3 (build 1, x86_64-w64-mingw32)
>> of 2019-08-29 built on CIRROCUMULUS
>> Repository revision: 96dd0196c28bc36779584e47fffcca433c9309cd
>> Windowing system distributor 'Microsoft Corp.', version 6.3.9600
>
> Do you see this when running under "emacs -Q"?
>
> What is the value of the `display-time-format' variable?
>
> Do you mean that it updates every second before sleep?
>
> How often does it update after you awaken after sleep?
>
> Best regards,
> Stefan Kangas
I tested following operations and got log.
Start emacs -Q
Setup logging
(setq display-time-hook
(lambda ()
(with-current-buffer (get-buffer-create "display time log")
(goto-char (point-max))
(insert (current-time-string now) ?\n))))
M-x display-time (16:01)
Wait for a while.
Sleep PC. (16:10)
Wait for a while.
Wake up PC. (16:29)
Wait for a while.
M-x display-time (16:36)
Explicitly calling display-time restarts display-time-timer.
Following lines are the contents of "display time log" buffer.
Thu Jan 23 16:01:03 2020
Thu Jan 23 16:02:00 2020
Thu Jan 23 16:03:00 2020
Thu Jan 23 16:04:00 2020
Thu Jan 23 16:05:00 2020
Thu Jan 23 16:06:00 2020
Thu Jan 23 16:07:00 2020
Thu Jan 23 16:08:00 2020
Thu Jan 23 16:09:00 2020
Thu Jan 23 16:10:00 2020
Thu Jan 23 16:29:43 2020
Thu Jan 23 16:29:43 2020
Thu Jan 23 16:30:43 2020
Thu Jan 23 16:31:43 2020
Thu Jan 23 16:32:43 2020
Thu Jan 23 16:33:43 2020
Thu Jan 23 16:34:43 2020
Thu Jan 23 16:35:43 2020
Thu Jan 23 16:36:43 2020
Thu Jan 23 16:36:59 2020
Thu Jan 23 16:37:00 2020
Thu Jan 23 16:38:00 2020
Thu Jan 23 16:39:00 2020
Thu Jan 23 16:40:00 2020
^ permalink raw reply [flat|nested] 8+ messages in thread* bug#39099: 26.3; display-time delay after PC sleep
2020-01-23 9:47 ` ynyaaa
@ 2020-01-23 14:39 ` Stefan Kangas
2020-01-23 18:11 ` Eli Zaretskii
2021-08-30 1:40 ` Lars Ingebrigtsen
1 sibling, 1 reply; 8+ messages in thread
From: Stefan Kangas @ 2020-01-23 14:39 UTC (permalink / raw)
To: ynyaaa; +Cc: 39099
ynyaaa@gmail.com writes:
> I tested following operations and got log.
I don't have access to a Windows machine so I'll leave investigating
this further to someone else. Thanks for provididing those details.
Best regards,
Stefan Kangas
^ permalink raw reply [flat|nested] 8+ messages in thread
* bug#39099: 26.3; display-time delay after PC sleep
2020-01-23 14:39 ` Stefan Kangas
@ 2020-01-23 18:11 ` Eli Zaretskii
0 siblings, 0 replies; 8+ messages in thread
From: Eli Zaretskii @ 2020-01-23 18:11 UTC (permalink / raw)
To: Stefan Kangas; +Cc: ynyaaa, 39099
> From: Stefan Kangas <stefan@marxist.se>
> Date: Thu, 23 Jan 2020 15:39:33 +0100
> Cc: 39099@debbugs.gnu.org
>
> I don't have access to a Windows machine so I'll leave investigating
> this further to someone else.
I don't think this is specific to Windows. The underlying problem
here is that our timers are interval timers: the next time a timer
fires is set by adding the interval to the time it fires now. So if
Emacs doesn't get CPU for a long time, it will start counting time
from the first moment it gets CPU again.
^ permalink raw reply [flat|nested] 8+ messages in thread
* bug#39099: 26.3; display-time delay after PC sleep
2020-01-23 9:47 ` ynyaaa
2020-01-23 14:39 ` Stefan Kangas
@ 2021-08-30 1:40 ` Lars Ingebrigtsen
2021-08-30 1:46 ` Lars Ingebrigtsen
1 sibling, 1 reply; 8+ messages in thread
From: Lars Ingebrigtsen @ 2021-08-30 1:40 UTC (permalink / raw)
To: ynyaaa; +Cc: Stefan Kangas, 39099
ynyaaa@gmail.com writes:
> Explicitly calling display-time restarts display-time-timer.
> Following lines are the contents of "display time log" buffer.
>
> Thu Jan 23 16:01:03 2020
> Thu Jan 23 16:02:00 2020
> Thu Jan 23 16:03:00 2020
> Thu Jan 23 16:04:00 2020
Right, because it's doing
(run-at-time t 60 ...)
which means that we should only run at each integral multiple of 60.
> Thu Jan 23 16:29:43 2020
> Thu Jan 23 16:29:43 2020
> Thu Jan 23 16:30:43 2020
> Thu Jan 23 16:31:43 2020
But then after sleeping, we're still running every 60 seconds -- but
it's not running on integral multiples?
Eli Zaretskii <eliz@gnu.org> writes:
> I don't think this is specific to Windows. The underlying problem
> here is that our timers are interval timers: the next time a timer
> fires is set by adding the interval to the time it fires now. So if
> Emacs doesn't get CPU for a long time, it will start counting time
> from the first moment it gets CPU again.
It sounds like something else is going on here. It's adding 60 seconds
correctly -- but not computing the integral multiples correctly... So
it sounds like somehow `timer-next-integral-multiple-of-time' is
computing things incorrectly after sleeping?
I had a look at the function, and I couldn't see anything obviously
wrong with it.
Here's a test case:
(format-time-string "%H:%M:%S"
(timer-next-integral-multiple-of-time (current-time) 60))
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 8+ messages in thread
* bug#39099: 26.3; display-time delay after PC sleep
2021-08-30 1:40 ` Lars Ingebrigtsen
@ 2021-08-30 1:46 ` Lars Ingebrigtsen
2021-08-31 1:05 ` Lars Ingebrigtsen
0 siblings, 1 reply; 8+ messages in thread
From: Lars Ingebrigtsen @ 2021-08-30 1:46 UTC (permalink / raw)
To: ynyaaa; +Cc: Stefan Kangas, 39099
Lars Ingebrigtsen <larsi@gnus.org> writes:
> I had a look at the function, and I couldn't see anything obviously
> wrong with it.
Ah, no -- I misread the timer code. It's only computing the first
repeat length (to get us to the integral multiple), but after that, it
doesn't recompute how long it should be to the next. So if we sleep for
103 second, then we'll fire immediately upon waking up, and then fire
every 60 seconds after that.
So to get this right, the timer machinery would have to recompute the
repeat to bring us back to the integral multiple...
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2021-08-31 1:05 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
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2020-01-12 13:42 bug#39099: 26.3; display-time delay after PC sleep ynyaaa
2020-01-23 5:08 ` Stefan Kangas
2020-01-23 9:47 ` ynyaaa
2020-01-23 14:39 ` Stefan Kangas
2020-01-23 18:11 ` Eli Zaretskii
2021-08-30 1:40 ` Lars Ingebrigtsen
2021-08-30 1:46 ` Lars Ingebrigtsen
2021-08-31 1:05 ` Lars Ingebrigtsen
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