linux-kernel - [PATCH 0/2] cpufreq: intel_pstate: Eliminate the PID controller

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Message-ID: <6183701.sLtcQDF8CA@aspire.rjw.lan>
Date:   Tue, 25 Jul 2017 00:10:04 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux PM <linux-pm@...r.kernel.org>
Cc:     Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Doug Smythies <dsmythies@...us.net>
Subject: [PATCH 0/2] cpufreq: intel_pstate: Eliminate the PID controller

Hi,

According to testing so far, the P-state selection based on the PID controller
in intel_pstate can be replaced with the P-state selection based on CPU load
with no considerable regressions *and* the PID-based P-state selection is
generally flaky and hard to manage, make intel_pstate use the P-state selection
based on CPU load for all categories of systems and eliminate the PID controller
along with all things related to it from the driver.

[1/2] is the actual elimination.
[2/2] is a simplification possible after [1/2].

Thanks,
Rafael