From: Michael Albinus <michael.albinus@gmx.de>
To: Peter Ludemann <peter.ludemann@gmail.com>
Cc: 38644@debbugs.gnu.org
Subject: bug#38644: 26.3; emacs uses 100% CPU with auto-revert-mode
Date: Sun, 29 Dec 2019 16:23:46 +0100 [thread overview]
Message-ID: <877e2fm9z1.fsf@gmx.de> (raw)
In-Reply-To: <CAHjfyZ0od_WLvW+YF4M0Hsp5M+3iARWKhUuNYG-iaTHhji8iEw@mail.gmail.com> (Peter Ludemann's message of "Sat, 28 Dec 2019 13:12:24 -0800")
Peter Ludemann <peter.ludemann@gmail.com> writes:
Hi Peter,
>> In bug#33194, a patch for Emacs 27.0.50 is mentioned. Do you have a
>> chance to run this for test?
>
> Emacs 27.0.50 somewhat fixes the problem with global-auto-revert-mode,
> using the same desktop file (and same open files) that was causing
> problems with Emacs 26.3. (Sorry I took so long to test this.)
Thanks for the feedback, the fix in Emacs 27 seems to work.
> Emacs CPU utilization is now ~30-80% (according to top(1)) instead of
> 100%; and responsiveness is good. Of course, it would be nicer if
> emacs CPU utilization were less, so that I could fully utilize that
> core (I only have 4 cores, so losing half a core is notable on large
> tests).
If I count correctly, your desktop file contains 489 buffers. Heavy load
for global-auto-revert-mode.
> Michael Albinus - you had a number of other questions ... do you still
> want them (or some of them) answered?
No, I don't believe so.
> PS: Here's the desktop file, in case that can give some clue as to
> what file or directory is causing problems. The "compilation"
> processes both input from and output into /tmp/pykythe_test -- as you
> can see, there are a couple of open files from that directory, but
> they're not being continuously updated, only once or twice per test.
auto-revert watches directories. Even if you watch only some few files
in a directory (I count 29 buffers which are bound to "/tmp"), there
will be lot of file notification events when other files in that
directory are changed. Maybe it helps to set auto-revert-use-notify to
nil for those files? You could do it via directory-local variales, as in
(dir-locals-set-class-variables 'auto-revert-with-polling
'((nil . ((auto-revert-use-notify . nil)))))
(dir-locals-set-directory-class
"/tmp/" 'auto-revert-with-polling)
(This is untested.)
> best,
> - peter
Best regards, Michael.
next prev parent reply other threads:[~2019-12-29 15:23 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-17 1:23 bug#38644: 26.3; emacs uses 100% CPU with auto-revert-mode Peter Ludemann
2019-12-17 13:59 ` Michael Albinus
2019-12-17 16:17 ` Eli Zaretskii
2019-12-17 18:27 ` Peter Ludemann
2019-12-17 19:30 ` Michael Albinus
2019-12-28 21:12 ` Peter Ludemann
2019-12-29 15:23 ` Michael Albinus [this message]
2020-01-04 18:50 ` Peter Ludemann
2020-01-05 9:28 ` Michael Albinus
2020-01-05 13:04 ` Mattias Engdegård
2020-01-05 19:31 ` Peter Ludemann
2020-01-05 19:57 ` Mattias Engdegård
2020-01-07 0:01 ` Peter Ludemann
2020-01-07 0:34 ` Peter Ludemann
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