Bug 477735

Summary: knotify4 tops powertop's wakers list
Product: [Fedora] Fedora Reporter: Amit Shah <amit.shah>
Component: kdebase-runtimeAssignee: Than Ngo <than>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 10CC: amit.shah, jreznik, kevin, lorenzo, ltinkl, rdieter, than, tuxbrewr
Target Milestone: ---Keywords: Reopened
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: KDE 4.2.0 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2009-02-19 11:42:51 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 474598    
Bug Blocks:    

Description Amit Shah 2008-12-23 06:11:14 UTC 
Description of problem:

Powertop output on my laptop shows these processes at the top:

Top causes for wakeups:
  40.7% (100.0)          knotify4 : __mod_timer (process_timeout)
  27.4% ( 67.4)      <kernel IPI> : Rescheduling interrupts
  14.3% ( 35.1)       <interrupt> : ahci, uhci_hcd:usb6, i915@pci:0000:00:02.0
   5.3% ( 13.1)           firefox : futex_wait (hrtimer_wakeup)
   2.2% (  5.5)             artsd : __mod_timer (process_timeout)

knotify4 is much higher than even firefox!
Comment 1 Rex Dieter 2008-12-23 14:57:41 UTC 
Known issue with kde-4.1, it's most likely phonon-backend-xine, which is addressed in kde-4.2 (coming soon).
Comment 2 Lukáš Tinkl 2008-12-29 14:34:19 UTC 
Quite likely, I don't see this with phonon-gstreamer which I'm using
Comment 3 Rex Dieter 2008-12-29 15:48:52 UTC 
See also kde bug, http://bugs.kde.org/156215
Comment 4 Lukáš Tinkl 2009-01-05 10:10:44 UTC 
Fixed in upstream, will be in KDE 4.2
Comment 5 Kevin Kofler 2009-02-09 18:20:05 UTC 
Reopening to track KDE 4.2 push (reference added to the KDE 4.2 update, so Bodhi should autoclose it).