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bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time
From: |
Eli Zaretskii |
Subject: |
bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time |
Date: |
Wed, 12 Mar 2014 18:17:04 +0200 |
> From: Andrew Beekhof <andrew@beekhof.net>
> Date: Wed, 12 Mar 2014 18:08:27 +1100
>
> I've been editing lots of python files in the last few days and noticed
> that Emacs has begun locking up for minutes at a time, for no apparent
> reason.
>
> Example actions that can trigger the problem C-s (isearch-forward),
> pressing 'y' in response to query-replace prompts, typing, etc.
> Whether the buffer is saved or not makes no difference.
>
> The only thing that really seems to help is switching back to a .c file.
>
> Is this a known problem?
>
> Example top output:
>
> top - 17:44:11 up 29 days, 22:26, 3 users, load average: 0.44, 0.50, 0.42
> Tasks: 236 total, 2 running, 233 sleeping, 0 stopped, 1 zombie
> %Cpu(s): 12.6 us, 0.1 sy, 0.0 ni, 87.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0
> st
> KiB Mem: 7871472 total, 7538448 used, 333024 free, 305676 buffers
> KiB Swap: 6029308 total, 731032 used, 5298276 free, 2390156 cached
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 22971 beekhof 20 0 644976 49236 16308 R 100.1 0.6 19:33.79 emacs
>
>
>
> 26689 root 20 0 53020 272 176 S 0.7 0.0 308:17.91 plymouthd
>
>
>
>
> A random blog suggested the following command might show something of
> interest. All I can tell is that thread 1 is quite deep.
>
> # echo 't a a where' > gdb.cmd; gdb /usr/bin/emacs -p 22971 -x gdb.cmd 2>&1
> </dev/null | tee /tmp/emacs.crash.backtrace
> GNU gdb (GDB) Fedora 7.6.50.20130731-19.fc20
The backtrace you posted indicates that Emacs is in garbage
collection. To see if this is indeed the cause of those "lockups",
could you please customize garbage-collection-messages to a non-nil
value, and then see if every time Emacs locks up there's a message in
the echo area announcing GC?
- bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time, Andrew Beekhof, 2014/03/12
- bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time, Michael Heerdegen, 2014/03/12
- bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time,
Eli Zaretskii <=
- bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time, Andrew Beekhof, 2014/03/12
- bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time, Eli Zaretskii, 2014/03/12
- bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time, Stefan Monnier, 2014/03/13
- bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time, Glenn Morris, 2014/03/13
- bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time, Andrew Beekhof, 2014/03/17
- bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time, Daniel Colascione, 2014/03/17
- bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time, Glenn Morris, 2014/03/17
- bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time, Andrew Beekhof, 2014/03/17
- bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time, Stefan, 2014/03/17
- bug#16995: 24.3; CPU usage spikes to 100% for minutes at a time, Andrew Beekhof, 2014/03/17