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http://www.openoffice.org/issues/show_bug.cgi?id=74911
------- Additional comments from [EMAIL PROTECTED] Fri Mar 16 12:53:06 +0000
2007 -------
I have tried forth and back and have been able to reliably recreate the problem
by hibernating Writer for an extended period of time (30+ minutes): Whenever I
resume from hibernation, Writer runs at 100 percent CPU load. However, I also
saw this problem happening with a clean Writer, started after resuming from
hibernation. But the only way that I can reliably recreate the problem is by
resuming from hibernation. This was with any two documents; I have included
two as samples, but any two documents does the same. I have not, however,
tried with a single document open only.
I have tried with Calc, by opening a Calc window and entering some dummy
numbers, and leaving the window open for 30 minutes, but the problem did not
appear there.
I have tried hibernating with a Calc window open and that did not recreate the
problem.
But the problem is definitely not limited to hibernation only as I just saw it
again in a fresh Writer window that had only run since after last hibernation.
Here's the procedure for how I recreated the problem using the two included
documents:
1. Open these two documents (I'm not sure if two documents are needed).
2. Edit the documents (single keystroke changes are sufficient), save.
3. Hibernate for an extended period of time (say some hours; 2 minutes is
insufficent).
4. Resume and immediately upon restart OOW loads one core at 100 percent.
I personally don't think that the documents matter anything. I think that the
period of hibernation matters. A 2-minute hibernation period didn't recreate
the problem, but a 30+ minutes and 7 hour hibernation did. So, in other words:
1. Edit some random document.
2. Hibernate (on a dual-core and perhaps even on a single-core) for an hour.
3. Resume and open Task Manager and see OOW at 50 percent.
But this still does not explain why the problem occasionally surfaces in the
middle of everything. Another possibility that I can think of is that it is
related to Writer being put in the background. My work flow is much like this:
while awake:
edit diary for random period of time
perform some task such as program a bit or read some file
edit other document for random period of time
So sometimes I edit the diary for two hours in a row, then Alt-Tab to a console
window, do some task, and then return back.
I know this:
1. The problem is not related to export of PDF (I thought so for a while).
2. The problem is not solely related to hibernation.
3. The problem is very difficult to recreate except by hibernation;
when I try to recreate it, it does not appear, and when I forget about
it for a few hours, it shows up again.
4. The problem is caused by Writer, not by Calc (as far as I can determine).
5. Disabling AutoSpell and AutoCorrect does not change anything.
6. The problem has been recreated with two small documents
(I don't know if one would have been sufficient; I have only seen the
problem with multiple documents open so far as far as I recall).
7. The problem is not related to the size of the document.
8. The problem is experienced as Task Manager saying "50 percent" load for
soffice.bin, which, on a dual-core system, is equivalent to a load of
100 percent on a single core (XP reports that as a load of 50 percent).
9. I very frequently have multiple documents open (almost all of the time),
because my diary is open all the time and I write many articles all day
long.
10. So far I have only been able to recreate the problem with multiple
documents open. It usually surfaces after a while with two documents
open.
11. The problem existed in both v2.0.4 and in v2.1 (I have tried both).
12. I never saw the problem in v1.x but didn't have dual-core back then.
The bottom line is that I CAN live with the problem. Obviously, I'd prefer a
solution but it is neither a show-stopper nor a critical issue. It just feels
stupid to have bought a dual-core system only to have your word processing app
(something that requires about the least imaginable CPU power of any application
type) to eat up a full core.
I am going to attach the files as "Issue 74911 testcase.zip".
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