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Description of problem: [kernel scheduler] Load balancing tick is way to busy Version-Release number of selected component (if applicable): 2.6.35.10-74.fc14.i686 How reproducible: Run powertop, admire how busy the load balancing tick is Steps to Reproduce: 1. run powertop Actual results: Top causes for wakeups: 70.8% (815.4) [kernel scheduler] Load balancing tick 6.2% ( 71.1) firefox 4.7% ( 54.3) [uhci_hcd:usb4, yenta, tifm_7xx1] <interrupt> 4.7% ( 54.3) USB device 4-1 : Logitech USB Optical Mouse (Logitech) 4.3% ( 49.0) [iwl3945] <interrupt> 3.5% ( 40.6) thunderbird-bin Expected results: A system that is responcive and works for me and not the kernel loadbalancing tick. Additional info: As specified in bug 635813 I am opening a new bug report for this on my machine. It is a HP nw9440 running an up to date fedora 14 i686. On my machine the tick is responcible for 50-80% of all wakeups constantly.
This doesn't seem to be an idle system - there's a lot of wakeups from firefox and there's interrupts from mouse activity. If you kill thunderbird and firefox and don't touch the mouse, how does it look?
Richard, just curious -- what are the side-effects of all of these wake-ups? Fan constantly running by chance? Also have an NW9440 on Fedora 14 i686 and the fan is constantly running on it. Rebooting the same machine into XP results in a idle fan and less heat... Will try powertop later and share results.
In needinfo for more than 6mo. If this still happens on f15 or f16, please open a new bug.