Messages in this thread |  | | Date | Fri, 10 Oct 2014 11:07:43 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 1/7] sched: Introduce scale-invariant load tracking |
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On Wed, Oct 08, 2014 at 01:38:40PM +0200, Vincent Guittot wrote: > I have in mind some system where the max achievable freq of a core > depends of how many cores are running simultaneously because of some > HW constraint like max current. In this case, the CPU might not reach > max frequency even with an always running task. > Then, beside frequency scaling, their is the uarch invariance that is > introduced by patch 4 that will generate similar behavior of the load.
This is a 'common' issue. x86 and powerpc also suffer this. It can be the result of either thermal or power thresholds.
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