* How to debug high CPU usage -> hang
@ 2023-01-10 14:58 Ken Goldman
2023-01-10 15:21 ` Eli Zaretskii
0 siblings, 1 reply; 5+ messages in thread
From: Ken Goldman @ 2023-01-10 14:58 UTC (permalink / raw)
To: help-gnu-emacs
I'm editing in ReST mode, Windows 11, emacs 28.1.
Occasionally, I want to jump (search, etc.) and the CPU usage jumps and
emacs hangs. I suspect a font-lock issue.
I fixed one by bisecting the text, then changing a table type. Now I
have another.
Is there a general way to debug?
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: How to debug high CPU usage -> hang
2023-01-10 14:58 How to debug high CPU usage -> hang Ken Goldman
@ 2023-01-10 15:21 ` Eli Zaretskii
2023-01-11 20:24 ` Ken Goldman
0 siblings, 1 reply; 5+ messages in thread
From: Eli Zaretskii @ 2023-01-10 15:21 UTC (permalink / raw)
To: help-gnu-emacs
> From: Ken Goldman <kgoldman@us.ibm.com>
> Date: Tue, 10 Jan 2023 09:58:58 -0500
>
> I'm editing in ReST mode, Windows 11, emacs 28.1.
>
> Occasionally, I want to jump (search, etc.) and the CPU usage jumps and
> emacs hangs. I suspect a font-lock issue.
>
> I fixed one by bisecting the text, then changing a table type. Now I
> have another.
>
> Is there a general way to debug?
I can suggest profiling and/or attaching a debugger.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: How to debug high CPU usage -> hang
2023-01-10 15:21 ` Eli Zaretskii
@ 2023-01-11 20:24 ` Ken Goldman
2023-01-12 7:36 ` Eli Zaretskii
0 siblings, 1 reply; 5+ messages in thread
From: Ken Goldman @ 2023-01-11 20:24 UTC (permalink / raw)
To: help-gnu-emacs
On 1/10/2023 10:21 AM, Eli Zaretskii wrote:
>> From: Ken Goldman <kgoldman@us.ibm.com>
>> Date: Tue, 10 Jan 2023 09:58:58 -0500
>>
>> I'm editing in ReST mode, Windows 11, emacs 28.1.
>>
>> Occasionally, I want to jump (search, etc.) and the CPU usage jumps and
>> emacs hangs. I suspect a font-lock issue.
>>
>> I fixed one by bisecting the text, then changing a table type. Now I
>> have another.
>>
>> Is there a general way to debug?
>
> I can suggest profiling and/or attaching a debugger.
>
Attaching a debugger to the lisp major mode, or building emacs from
source?
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: How to debug high CPU usage -> hang
2023-01-11 20:24 ` Ken Goldman
@ 2023-01-12 7:36 ` Eli Zaretskii
2023-01-12 10:36 ` Manuel Giraud
0 siblings, 1 reply; 5+ messages in thread
From: Eli Zaretskii @ 2023-01-12 7:36 UTC (permalink / raw)
To: help-gnu-emacs
> From: Ken Goldman <kgoldman@us.ibm.com>
> Date: Wed, 11 Jan 2023 15:24:53 -0500
>
> On 1/10/2023 10:21 AM, Eli Zaretskii wrote:
> >> From: Ken Goldman <kgoldman@us.ibm.com>
> >> Date: Tue, 10 Jan 2023 09:58:58 -0500
> >>
> >> I'm editing in ReST mode, Windows 11, emacs 28.1.
> >>
> >> Occasionally, I want to jump (search, etc.) and the CPU usage jumps and
> >> emacs hangs. I suspect a font-lock issue.
> >>
> >> I fixed one by bisecting the text, then changing a table type. Now I
> >> have another.
> >>
> >> Is there a general way to debug?
> >
> > I can suggest profiling and/or attaching a debugger.
> >
>
> Attaching a debugger to the lisp major mode, or building emacs from
> source?
Attaching a debugger (GDB) to Emacs when its CPU usage jumps. This
requires Emacs built with debug info, or installing the separate debug
info from your distro.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: How to debug high CPU usage -> hang
2023-01-12 7:36 ` Eli Zaretskii
@ 2023-01-12 10:36 ` Manuel Giraud
0 siblings, 0 replies; 5+ messages in thread
From: Manuel Giraud @ 2023-01-12 10:36 UTC (permalink / raw)
To: Eli Zaretskii; +Cc: help-gnu-emacs
Eli Zaretskii <eliz@gnu.org> writes:
[...]
>> Attaching a debugger to the lisp major mode, or building emacs from
>> source?
>
> Attaching a debugger (GDB) to Emacs when its CPU usage jumps. This
> requires Emacs built with debug info, or installing the separate debug
> info from your distro.
And if you get the Emacs source tree, you should read etc/DEBUG that
contains most of the informations you need to do this.
--
Manuel Giraud
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2023-01-12 10:36 UTC | newest]
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2023-01-10 14:58 How to debug high CPU usage -> hang Ken Goldman
2023-01-10 15:21 ` Eli Zaretskii
2023-01-11 20:24 ` Ken Goldman
2023-01-12 7:36 ` Eli Zaretskii
2023-01-12 10:36 ` Manuel Giraud
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