Q: High processor load with change to GNU Emacs 22 under Windows

Q: High processor load with change to GNU Emacs 22 under Windows

[Torsten Zirzlaff]

Hi.

I encounter a strange problem with GNU Emacs 22 under Windows.

   If I open a C or C++ file in Emacs 22 I encounter a very high
workload. On a single porcessor system GNU Emacs uses 100%
of the CPU while I do nothing. If I <Ctrl>+g I stops shortly
and starts again. On a multiprocessor system it uses up a
complete CPU. This only happens if I load a C/C++ file.

   Other modes TeX, Lisp, etc. do not have that particular
problem. I also have no Problem using GNU Emacs 22 with
MacOSX, Linux, etc.

   Any hints what goes wrong here?

TIA

	Torsten

Re: Q: High processor load with change to GNU Emacs 22 under Windows

[Eli Zaretskii]

> From: Torsten Zirzlaff <zirzlaff@nienor.s.bawue.de>
> Date: Sat, 06 Oct 2007 00:07:48 +0200
> 
>    If I open a C or C++ file in Emacs 22 I encounter a very high
> workload. On a single porcessor system GNU Emacs uses 100%
> of the CPU while I do nothing. If I <Ctrl>+g I stops shortly
> and starts again. On a multiprocessor system it uses up a
> complete CPU. This only happens if I load a C/C++ file.

Does the problem go away if you start Emacs with "emacs -Q", and then
open a C/C++ file?  If so, maybe you load in your .emacs some optional
package that causes this problem.

Re: Q: High processor load with change to GNU Emacs 22 under Windows

[Sven Joachim]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Torsten Zirzlaff <zirzlaff@nienor.s.bawue.de>
>> Date: Sat, 06 Oct 2007 00:07:48 +0200
>> 
>>    If I open a C or C++ file in Emacs 22 I encounter a very high
>> workload. On a single porcessor system GNU Emacs uses 100%
>> of the CPU while I do nothing. If I <Ctrl>+g I stops shortly
>> and starts again. On a multiprocessor system it uses up a
>> complete CPU. This only happens if I load a C/C++ file.
>
> Does the problem go away if you start Emacs with "emacs -Q", and then
> open a C/C++ file?  If so, maybe you load in your .emacs some optional
> package that causes this problem.

One particular package that causes this problem is semantic prior to
version 1.0pre4 (see etc/NEWS).

Re: Q: High processor load with change to GNU Emacs 22 under Windows

[Eli Zaretskii]

> From: Sven Joachim <svenjoac@gmx.de>
> Date: Sat, 06 Oct 2007 10:20:01 +0200
> 
> One particular package that causes this problem is semantic prior to
> version 1.0pre4 (see etc/NEWS).

This should be in PROBLEMS, not in NEWS.

Re: Q: High processor load with change to GNU Emacs 22 under Windows

[Torsten Zirzlaff]

Hi.

Sven Joachim schrieb:
> Eli Zaretskii <eliz@gnu.org> writes:
> 
>>> From: Torsten Zirzlaff <zirzlaff@nienor.s.bawue.de>
>>> Date: Sat, 06 Oct 2007 00:07:48 +0200
>>>
>>>    If I open a C or C++ file in Emacs 22 I encounter a very high
>>> workload. On a single porcessor system GNU Emacs uses 100%
>>> of the CPU while I do nothing. If I <Ctrl>+g I stops shortly
>>> and starts again. On a multiprocessor system it uses up a
>>> complete CPU. This only happens if I load a C/C++ file.
>> Does the problem go away if you start Emacs with "emacs -Q", and then
>> open a C/C++ file?  If so, maybe you load in your .emacs some optional
>> package that causes this problem.
> 
> One particular package that causes this problem is semantic prior to
> version 1.0pre4 (see etc/NEWS).

   I'll try the given hints. I had the CEDET packages under suspicion as
well. I'll install the current 1.0pre4 version and hope the problem
is solved.

   What got me puzzling was  the fact when I kill all buffers the 
workload just stays.

   Anyway many thanks so far and I give feedback if I got the
problem solved. Otherwise I had to ask again.

Ciao

	Torsten

Re: Q: High processor load with change to GNU Emacs 22 under Windows

[Eli Zaretskii]

> From: Torsten Zirzlaff <zirzlaff@nienor.s.bawue.de>
> Date: Sun, 07 Oct 2007 18:47:58 +0200
> 
>    What got me puzzling was  the fact when I kill all buffers the 
> workload just stays.

AFAIU, the problem happens because idle timers installed by Semantic,
and those timers are not killed by killing buffers (AFAIK).

Re: Q: High processor load with change to GNU Emacs 22 under Windows

[Torsten Zirzlaff]

Hi.

Sven Joachim schrieb:
> Eli Zaretskii <eliz@gnu.org> writes:
> 
>>> From: Torsten Zirzlaff <zirzlaff@nienor.s.bawue.de>
>>> Date: Sat, 06 Oct 2007 00:07:48 +0200
>>>
>>>    If I open a C or C++ file in Emacs 22 I encounter a very high
>>> workload. On a single porcessor system GNU Emacs uses 100%
>>> of the CPU while I do nothing. If I <Ctrl>+g I stops shortly
>>> and starts again. On a multiprocessor system it uses up a
>>> complete CPU. This only happens if I load a C/C++ file.
>> Does the problem go away if you start Emacs with "emacs -Q", and then
>> open a C/C++ file?  If so, maybe you load in your .emacs some optional
>> package that causes this problem.
> 
> One particular package that causes this problem is semantic prior to
> version 1.0pre4 (see etc/NEWS).

   It seems that you were right. After I had installed CEDET 1.0pre4
this behaviour had vanished.

   Many thanks for the help from the people here in this group.

Ciao

	Torsten