From: Prarit Bhargava <prarit@redhat.com>
To: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
rafael.j.wysocki@intel.com, viresh.kumar@linaro.org
Cc: linux-pm@vger.kernel.org, trenn@suse.de
Subject: Re: [PATCH v2 0/4] cpufreq governors and Intel P state driver compatibility
Date: Tue, 08 Dec 2015 18:45:49 -0500 [thread overview]
Message-ID: <56676BAD.4030707@redhat.com> (raw)
In-Reply-To: <1449613890-10403-1-git-send-email-srinivas.pandruvada@linux.intel.com>
On 12/08/2015 05:31 PM, Srinivas Pandruvada wrote:
> Intel P State driver implements two policies, performance and powersave.
> The powersave policy is similar to ondemand cpufreq governor when using
> acpi-cpufreq. This causes lots of confusion among users. This results
> in invalid comparison of performance when acpi-cpufreq and Intel P state
> performance is compared.
>
> The reason Intel P state called powersave when it actually implemented
> ondemand style P State selection, because the cpufreq core only allows
> two generic policies "performance and powersave" for drivers which has
> setpolicy() interface. All drivers using this interface are forced to
> support these two policies.
>
> This patchset adds feature to have configurable generic policies and
> allows ondemand as one of the policy. With this approach, Intel P state
> now adds support for ondemand policy and power save policy both in
> addition to performance.
Srinivas, if I read the patchset correctly then this means that ondemand ==
powersave ?
If so, is the intention to one day remove powersave altogether and switch to
only ondemand & performance?
P.
next prev parent reply other threads:[~2015-12-08 23:45 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-08 22:31 [PATCH v2 0/4] cpufreq governors and Intel P state driver compatibility Srinivas Pandruvada
2015-12-08 22:31 ` [PATCH v2 1/4] cpufreq: Add configurable generic policies Srinivas Pandruvada
2015-12-09 2:18 ` Viresh Kumar
2015-12-08 22:31 ` [PATCH v2 2/4] cpufreq: Add ondemand as a generic policy Srinivas Pandruvada
2015-12-08 22:31 ` [PATCH v2 3/4] Documentation: cpu-freq: update setpolicy documentation Srinivas Pandruvada
2015-12-09 2:19 ` Viresh Kumar
2015-12-08 22:31 ` [PATCH v2 4/4] cpufreq: intel_pstate: Change powersave to ondemand policy Srinivas Pandruvada
2015-12-08 23:45 ` Prarit Bhargava [this message]
2015-12-08 23:57 ` [PATCH v2 0/4] cpufreq governors and Intel P state driver compatibility Srinivas Pandruvada
2015-12-09 13:12 ` Prarit Bhargava
2015-12-09 16:18 ` Srinivas Pandruvada
2015-12-16 19:33 ` Srinivas Pandruvada
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