[Bug 552020] Re: multi core laptop system overheating, powertop showing a lot [Rescheduling interrupts] <kernel IPI>

alx5000 alx5000 at alx5000.net
Tue May 25 00:48:53 UTC 2010


I managed to reduce the Rescheduling Interrupts by appending the
"nolapic" to the kernel line.

My system gets around 15 wakes per second (total!) when it's idle now,
no more hundreds-of-unexplained-interrupts. Battery time and CPU
temperature are back to normal, as well.

I've seen a small increment in OHCI interrupts (hda-intel, ath, sata),
but it's negligible: around 40-50 wakes per second when I'm using
Firefox (which makes heavy use of my HDD and wifi card). To put it in
perspective, my touchpad alone will cause more than 100 wakes per second
when it's active.

If someone could explain what collateral damage could "nolapic" cause,
I'd be very grateful.

Otherwise, please try it for yourselves and post your results.

-- 
multi core laptop system overheating, powertop showing a lot [Rescheduling interrupts] <kernel IPI>
https://bugs.launchpad.net/bugs/552020
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