Messages in this thread | | | Subject | [REGRESSION 2.6.28-rc2-git3] lots of extra timer interrupts costing 2W | From | "Theodore Ts'o" <> | Date | Wed, 29 Oct 2008 22:18:10 -0400 |
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I've noticed that sometime between 2.6.27-git7 and 2.6.28-rc2-git3, powertop is reporting a huge number of excess timer interrupts on my x61s laptop:
Wakeups-from-idle per second : 617.8 interval: 3.1s no ACPI power usage estimate available
Top causes for wakeups: 71.3% (543.7) <interrupt> : extra timer interrupt 13.5% (103.0) <kernel core> : hrtimer_start_expires (tick_sched_timer) 7.2% ( 55.0) <kernel IPI> : Rescheduling interrupts 1.7% ( 13.0) gnome-terminal : hrtimer_start_expires (hrtimer_wakeup) 1.4% ( 10.3) <interrupt> : PS/2 keyboard/mouse/touchpad 1.1% ( 8.3) <interrupt> : ahci 0.4% ( 3.3) multiload-apple : hrtimer_start_expires (hrtimer_wakeup) 0.3% ( 2.7) Xorg : hrtimer_start (it_real_fn)
This is costing me an extra 2 Watts or so. Does this ring a bell with anyone, before I start trying to bisect this problem?
- Ted
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