Re: [PATCH 1/7] sched: Introduce scale-invariant load tracking

[Peter Zijlstra]

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.


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/