linux-kernel - [PATCH v1 0/3] cpufreq: intel_pstate: Simplify the energy model for hybrid systems

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Message-ID: <5937608.DvuYhMxLoT@rafael.j.wysocki>
Date: Wed, 08 Oct 2025 20:54:30 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Linux PM <linux-pm@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>, Lukasz Luba <lukasz.luba@....com>,
 Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
 Dietmar Eggemann <dietmar.eggemann@....com>,
 Christian Loehle <christian.loehle@....com>
Subject:
 [PATCH v1 0/3] cpufreq: intel_pstate: Simplify the energy model for hybrid
 systems

Hi Everyone,

I've realized recently that the (artificial) energy model used by intel_pstate
on hybrid platforms without SMT is much more complicated than really necessary,
so I've decided to simplify it.

The new energy model uses less memory and it introduces less overhead into the
scheduler (mostly due to the reduction of the states table size).  This change
in made in patch [3/3] (please see the changelog for the rationale).

The first two patches in the series are preliminary.

Thanks!