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[Bug 524281] Re: Tens of wakes per second in "[kernel scheduler] Load balancing tick" on Core 2 Duo even with only 1 core enabled

To: registry@xxxxxxxxxxxxxxxxxxx
From: DH <524281@xxxxxxxxxxxxxxxxxx>
Date: Tue, 12 Oct 2010 08:55:13 -0000
Reply-to: Bug 524281 <524281@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

I am seeing similar results as Elias Julkunen with 2.6.26-rc7 kernel
from mainline kernels. My system is an Acer 3820T-5246 with Core i3-350M
(no GPU). Kernel scheduler Load balancing ticks have dropped from about
120-230 on 2.6.35.x to a range of about 11 to 28. Even with the added
wakeups from kworker/0:0, /0:1, and Rescheduler interrupts, total system
wakeups are down by a factor of 2 to 3. ACPI power estimates are also
down from ~16W to ~12W with a similarly loaded system.

Also seeing a side bonus in stability when switching multiple screen
outputs, and input lag is still present but probably improved by 60% or
so. So, all in all I recommend anyone worried about wakeups try 2.6.36
at your earliest convenience.

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Tens of wakes per second in "[kernel scheduler] Load balancing tick" on Core 2 Duo even with only 1 core enabled
https://bugs.launchpad.net/bugs/524281
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