Bug 151832

Summary: ktorrent causes up to 400 wakeups/second
Product: [Applications] ktorrent Reporter: Yves Glodt <yg>
Component: generalAssignee: Joris Guisson <joris.guisson>
Status: RESOLVED FIXED    
Severity: normal    
Priority: NOR    
Version: unspecified   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In:

Description Yves Glodt 2007-11-03 23:10:53 UTC 
Version:           2.2.1 (using KDE KDE 3.5.8)
Installed from:    Ubuntu Packages
OS:                Linux

On my fully up-to-date Kubuntu Gutsy, ktorrent 2.2.1 causes between 380 and 400 wakeups per second, here is the relevant line of the powertop output:

36.5% (380.2)          ktorrent : futex_wait (hrtimer_wakeup)

At this moment, 3 downloads were loaded and active in ktorrent.

I like ktorrent :-) Will it be possible to reduce this very high amount of wakeups.

Let me know if you need more information about my system.
Comment 1 Yves Glodt 2007-11-03 23:49:07 UTC 
There is another source of 86 wakeups in ktorrent on my system:

11.6% ( 86.0)          ktorrent : schedule_timeout (process_timeout)
Comment 2 Joris Guisson 2007-11-04 13:44:54 UTC 
You can't get work done when you are sleeping. It might be possible to reduce this a bit, but I doubt we could substantially reduce that.
Comment 3 Joris Guisson 2008-11-10 13:56:59 UTC 
Latest SVN never manages to get above a couple of percentages, while it is downloading at 700 KB/s, so this bug can be closed.