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From: "Rafael J. Wysocki" <rafael@kernel.org>
To: Andy Tang <andy.tang@nxp.com>
Cc: Doug Smythies <dsmythies@telus.net>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Linux PM <linux-pm@vger.kernel.org>,
	Viresh Kumar <viresh.kumar@linaro.org>,
	Stratos Karafotis <stratosk@semaphore.gr>
Subject: Re: Ask for help on governor
Date: Fri, 15 Dec 2017 15:26:18 +0100	[thread overview]
Message-ID: <CAJZ5v0gk_hm1LMOWUZ0RfsEZB=xJHJgLvvyQmteb_vtBdYqsJA@mail.gmail.com> (raw)
In-Reply-To: <HE1PR0402MB282849253906D2387281806FF30B0@HE1PR0402MB2828.eurprd04.prod.outlook.com>

On Fri, Dec 15, 2017 at 10:00 AM, Andy Tang <andy.tang@nxp.com> wrote:
> Hi Doug,
>
>> -----Original Message-----
>> From: Doug Smythies [mailto:dsmythies@telus.net]
>> Sent: Friday, December 15, 2017 3:38 PM
>> To: Andy Tang <andy.tang@nxp.com>
>> Cc: 'Rafael J. Wysocki' <rafael@kernel.org>; 'Rafael J. Wysocki'
>> <rjw@rjwysocki.net>; 'Linux PM' <linux-pm@vger.kernel.org>; 'Viresh
>> Kumar' <viresh.kumar@linaro.org>; 'Stratos Karafotis'
>> <stratosk@semaphore.gr>
>> Subject: RE: Ask for help on governor
>>
>> Hi Andy,
>>
>> Could you please try the below reversion patch.
>> It is on top of kernel 4.15-rc3.
> Tried, no any effects.

Does this mean that the revert helps or that it doesn't help?

>>
>> On my system, and for the intel_cpufrequ scaling driver, the default
>> sampling_rate goes back to 20000 (which works) from 500 uSec (which
>> doesn't), for both the conservative and ondemand governors.
>
> If I set the sampling_rate to 20,000 (actually 10,000 is enough), cpufreq works too for both the conservative and ondemand governors.
> But on my platforms, the default rate is 1000 which leads to cpu load calculating issue.
>

OK, that's good to know.

I'll look deeper into this later today or tomorrow.

Thanks,
Rafael

  reply	other threads:[~2017-12-15 14:26 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <HE1PR0402MB282866171A847AE244A9F76CF3340@HE1PR0402MB2828.eurprd04.prod.outlook.com>
2017-12-12  7:30 ` Ask for help on governor Viresh Kumar
2017-12-12 16:18 ` Doug Smythies
2017-12-12 16:51   ` Rafael J. Wysocki
2017-12-13  3:10   ` Doug Smythies
2017-12-13  6:17     ` Viresh Kumar
2017-12-13  6:22       ` Andy Tang
2017-12-13  6:55         ` Viresh Kumar
2017-12-13 16:13       ` Doug Smythies
2017-12-14  1:21       ` Doug Smythies
2017-12-14  2:42         ` Andy Tang
2017-12-14 18:25           ` Stratos Karafotis
2017-12-15  1:29           ` Doug Smythies
2017-12-15  1:30         ` Doug Smythies
2017-12-15  1:56           ` Andy Tang
2017-12-15  7:37           ` Doug Smythies
2017-12-15  9:00             ` Andy Tang
2017-12-15 14:26               ` Rafael J. Wysocki [this message]
2017-12-15 15:53             ` Rafael J. Wysocki
2017-12-15 18:27             ` Doug Smythies
2017-12-15 23:53               ` Rafael J. Wysocki
2017-12-18  1:15               ` [PATCH] cpufreq: governor: Ensure sufficiently large sampling intervals Rafael J. Wysocki
2017-12-18  2:59                 ` Andy Tang
2017-12-18  4:38                 ` Viresh Kumar
2017-12-18 16:11               ` Doug Smythies
2017-12-18 17:42                 ` Rafael J. Wysocki
2017-12-13 16:13     ` Ask for help on governor Doug Smythies
2017-12-13 16:49     ` Doug Smythies

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