Messages in this thread | | | Date | Mon, 29 Aug 2022 16:34:39 +0200 | From | Peter Zijlstra <> | Subject | Re: [RFC PATCH 1/1] sched/pelt: Introduce PELT multiplier |
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On Mon, Aug 29, 2022 at 02:23:17PM +0000, Quentin Perret wrote:
> I'll let folks in CC comment about their use-case in more details, but > there's definitely been an interest in tuning this thing at run-time
An interest and it making sense are two very distinct things that bear no relation to one another in any way.
> FWIW. Typically a larger half-life will be fine with predictable > workloads with little inputs from users (e.g. fullscreen video playback) > while a lower one can be preferred in highly interactive cases (games,
As per always; consider the combined workload.
> ...). The transient state is fun to reason about, but it really > shouldn't be too common AFAIK.
Once you give away control there is no taking it back, and userspace *will* do stupid things and expect unicorns.
> With that said I'd quite like to see numbers to back that claim. > Measuring power while running a video (for instance) with various HL > values should help. And similarly it shouldn't be too hard to get > performance numbers.
I'm thinking this all needs far more than mere numbers to justify.
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