From: "Doug Smythies" <dsmythies@telus.net>
To: 'Thomas Ilsche' <thomas.ilsche@tu-dresden.de>,
'Len Brown' <lenb@kernel.org>
Cc: "'Rafael J. Wysocki'" <rafael.j.wysocki@intel.com>,
"'Alex Shi'" <alex.shi@linaro.org>,
"'Ingo Molnar'" <mingo@kernel.org>,
"'Rik van Riel'" <riel@redhat.com>,
"'Daniel Lezcano'" <daniel.lezcano@linaro.org>,
"'Nicholas Piggin'" <npiggin@gmail.com>,
"'Linux PM list'" <linux-pm@vger.kernel.org>,
"'Marcus Hähnel'" <mhaehnel@os.inf.tu-dresden.de>,
"'Daniel Hackenberg'" <daniel.hackenberg@tu-dresden.de>,
"'Robert Schöne'" <robert.schoene@tu-dresden.de>,
mario.bielert@tu-dresden.de
Subject: RE: [PATCH] cpuidle: Allow menu governor to enter deeper sleep states after some time
Date: Sat, 21 Oct 2017 07:27:33 -0700 [thread overview]
Message-ID: <000701d34a78$be36a6e0$3aa3f4a0$@net> (raw)
In-Reply-To: 5alHedkBdhCDu5alJeMF7o
On 2017.10.20 09:32 Thomas Ilsche wrote:
>> To prove that this is the result of OS C-state demotion, I have
>> implemented option "d)" in your paper. I added a module param,
>> currently called "cpuidle.powersave", that causes cpuidle to bypass
>> the governor altogether and select the deepest state that is allowed
>> by PM_QOS. (maybe I should call it cpuidle.bypass, or
>> cpuidle.deepest...) When i set this parameter, multi-user C-state
>> residency and power equal that seen in single-user mode, with no
>> spikes.
>
> Can you please share the patch, I'd like to use it for some experiments.
Can you not achieve the same, or at least similar and good enough for
testing, conditions by disabling all the other idle states?
On my system, the max idle state is 4 (C6), and I just disable states
0-3 to force always state 4.
... Doug
next prev parent reply other threads:[~2017-10-21 14:27 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <a181bf42-9462-476c-6dcd-39fc7151957f@tu-dresden.de>
2017-07-27 12:50 ` [PATCH] cpuidle: Allow menu governor to enter deeper sleep states after some time Thomas Ilsche
2017-10-19 7:46 ` Len Brown
2017-10-20 16:31 ` Thomas Ilsche
2017-10-21 14:27 ` Doug Smythies [this message]
2017-10-20 0:17 ` Doug Smythies
2017-10-20 17:13 ` Thomas Ilsche
2017-10-21 14:28 ` Doug Smythies
2017-11-07 23:04 ` Thomas Ilsche
2017-11-08 4:53 ` Len Brown
2017-11-08 6:01 ` Yu Chen
2017-11-08 16:26 ` Doug Smythies
2017-11-08 16:26 ` Doug Smythies
2017-11-10 17:42 ` Doug Smythies
2017-11-14 6:12 ` Doug Smythies
2017-11-16 16:11 ` Thomas Ilsche
2017-11-16 22:47 ` Doug Smythies
2017-11-24 17:36 ` Doug Smythies
2017-12-02 12:56 ` Thomas Ilsche
2017-12-15 10:44 ` Thomas Ilsche
2017-12-15 14:23 ` Rafael J. Wysocki
2017-12-21 9:43 ` Thomas Ilsche
2017-12-22 19:37 ` Rafael J. Wysocki
2017-12-15 16:16 ` Doug Smythies
2017-12-16 2:34 ` Rafael J. Wysocki
2017-11-25 16:30 ` Doug Smythies
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