Re: fix cpufreq-ondemand by accounting skipped ticks as idle ticks [Was: [PATCH] i386 no idle HZ aka Dynticks 051203]

From: Con Kolivas
Date: Sun Dec 04 2005 - 21:17:03 EST


On Sunday 04 December 2005 23:24, Dominik Brodowski wrote:
> Account ticks skipped dynamically as idle ticks.
>
> This allows the ondemand cpufreq governor to work correctly with dyntick.

Dominik one thing I noticed a while back was that ondemand also polls at a
frequency that creates a timer at around 140 HZ. Tweaking the ondemand/
tunables and making it poll ten times less frequently made a big difference
to this (obviously) but did obviously slow down the scaling speed - this was
the frequency required to bring it to that of the background timers (<=20HZ).
I see scope for this polling to be dynamic too :D

Cheers,
Con
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