From: Arjan van de Ven <arjan at linux.intel.com>
To: powertop@lists.01.org
Subject: Re: [Powertop] cpu wiggle changes userspace governor settings
Date: Wed, 27 Jul 2016 06:04:59 -0700 [thread overview]
Message-ID: <da360754-a907-e098-8437-c21f620d58a0@linux.intel.com> (raw)
In-Reply-To: 342d1204-68b7-7943-9a17-61b98f2763cb@tu-dresden.de
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On 7/27/2016 12:10 AM, Thomas Ilsche wrote:
> On 2016-07-26 20:20, Joe Konno wrote:
>>> >
>>> > Please note that I don't really understand what you are trying to
>>> > achieve with the wiggle in the first place. It seems for instance
>>> > that this doesn't do anything if max_freq == min_freq.
>> We need to force a perf event at the beginning of the sampling
>> period. That's the only way the code can determine the starting
>> frequency. There may be other/better ways to do this. Patches, input
>> always welcome.
>
> If the event is only used to get the frequency at the start, is there a reason why scaling_cur_freq is not used instead?
>
mostly scaling_cur_freq returns a lie ;-(
next reply other threads:[~2016-07-27 13:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-27 13:04 Arjan van de Ven [this message]
-- strict thread matches above, loose matches on Subject: below --
2016-07-27 14:34 [Powertop] cpu wiggle changes userspace governor settings Joe Konno
2016-07-27 7:10 Thomas Ilsche
2016-07-27 7:07 Thomas Ilsche
2016-07-26 18:20 Joe Konno
2016-07-26 17:27 Joe Konno
2016-07-21 10:13 Thomas Ilsche
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