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bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. f
From: |
Alexander Asteroth |
Subject: |
bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file |
Date: |
Mon, 21 Aug 2017 18:51:25 +0200 |
User-agent: |
mu4e 0.9.17; emacs 25.2.1 |
Eli Zaretskii writes:
>> I tried and after bisection after bisection, hangs got less but did not
>> disappear. Then I did one final test with emacs -Q again and actually
>> managed, after several minutes, a hanging as well, after find-file with
>> completion in buffers with lots of files in it (/usr/share/... or
>> similar).
>>
>> I come to the conclusion, that it probably is not an emacs problem at
>> all but rather a hardware or OS problem that manifests only in a singe
>> threaded application like emacs.
>
> Hmm. This description is not entirely consistent with your original
> report, which said:
>
>> my emacs hangs pretty often anf for 10 secs. ca. when I am prompted for
>> e.g. a file in find-file, or an interactive function in M-x or a
>> shell-command in read-shell-command. It seems to happen only, in these
>> cases, when there is an option to auto-complete.
Not inconsistend but there seems to be a gradual decrease in the
frequency this happens (depending on the size of my init.el). With emacs
-Q it happens so rarely, I have to change folder and complete very
often.
>
> This doesn't sound like the hangs were while Emacs was actually
> auto-completing on file names. Was that just an inaccuracy in the
> description, and you in fact see the hangs only while Emacs completes
> on file names, after you type TAB etc.?
>
> In any case, 10 sec for completion sounds like a lot to me.
> Especially since yours looks like an optimized build. How many files
> do you have in the directory where completion is so slow? And what
> kind of CPU do you have on that system?
I also tried emacs 25.2 with the same result. System is a 1 year old
Lenovo ThinkPad Yoga 260.
As I said I'm not really sure any more it is emacs. What is particularly
surprising is the huge difference between read on file descriptor 3 and
4. fd 3 take 0.00002 on average, fd 4 takes 0.4 to 0.9 seconds.
-- Alex
- bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file, Alexander Asteroth, 2017/08/19
- bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file, Eli Zaretskii, 2017/08/19
- bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file, Alexander Asteroth, 2017/08/21
- bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file, Eli Zaretskii, 2017/08/21
- bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file,
Alexander Asteroth <=
- bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file, Alexander Asteroth, 2017/08/22
- bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file, Eli Zaretskii, 2017/08/22
- bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file, Alexander Asteroth, 2017/08/22
- bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file, Alexander Asteroth, 2017/08/22
- bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file, Eli Zaretskii, 2017/08/22
- bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file, Alexander Asteroth, 2017/08/28
- bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file, Eli Zaretskii, 2017/08/28
- bug#28149: 26.0.50; Emacs regularly hangs for multiple seconds in e.g. find-file, Alexander Asteroth, 2017/08/22