Bug 83391

Summary:	Kst uses almost 100% cpu after applying fit plugin to large dataset
Product:	[Applications] kst	Reporter:	Rick Chern <rchern>
Component:	general	Assignee:	kst
Status:	RESOLVED FIXED
Severity:	normal
Priority:	NOR
Version:	1.x
Target Milestone:	---
Platform:	RedHat Enterprise Linux
OS:	Linux
Latest Commit:		Version Fixed In:

Description Rick Chern 2004-06-14 23:42:26 UTC

Version:           0.98-devel (using KDE KDE 3.2.1)
Installed from:    RedHat RPMs
Compiler:          gcc (GCC) 3.3.2 20031022  
OS:                Linux

After applying plugin to (200000 or so elements) large vectors, kst uses 100% cpu and becomes generally slow and unstable.

How to reproduce:

1. Create two large (200000 or so elements) vectors (gyrodata.dat can be used).  
2. Open the Data Manager, and create a plugin. Select a fit plugin (Fit exponential seems to cause particularly high usage). Select two different vectors as the X and Y vectors.
3. Click Apply as New.
4. Use "top" to check CPU usage of Kst.

Cpu usage will be 90% to 100%.  
After subsequent general use, kst will often crash.

Expected Behaviour:
Cpu usage should not be 90% to 100%.

Comment 1 George Staikos 2004-06-22 20:38:40 UTC

I can't reproduce any sort of memory corruption or slowness with HEAD using the "linefit" plugin.  This indicates to me that if there are any such problems, they are most likely related to the plugin you are using.

Comment 2 Rick Chern 2004-07-13 19:03:55 UTC

I think this was fixed for 0.98.  Cannot reproduce anymore.

Comment 3 George Staikos 2004-07-13 19:07:49 UTC

On Tuesday 13 July 2004 13:03, Rick Chern wrote:
> ------- Additional Comments From rchern interchange ubc ca  2004-07-13
> 19:03 ------- I think this was fixed for 0.98.  Cannot reproduce anymore.

  Yes I fixed it.  I forgot there was a bug open about it.