Messages in this thread | | | Date | Sun, 8 Jun 2014 07:53:07 +0800 | From | Yuyang Du <> | Subject | Re: [RFC PATCH 06/16] arm: topology: Define TC2 sched energy and provide it to scheduler |
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On Fri, Jun 06, 2014 at 02:13:05PM +0200, Ingo Molnar wrote: > > Leakage current typically gets higher with higher frequencies, but > it's also highly process dependent AFAIK. >
In general, you can assume leakage power ~ V^2.
> If switching power dissipation is the main factor in power use, then > we can essentially assume that P ~ V^2, at the same frequency - and > scales linearly with frequency - but real work performed also scales > semi-linearly with frequency for many workloads, so that's an > invariant for everything except highly memory bound workloads. >
Agreed. Strictly, Energy ~ V^2.
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