From: Arjan van de Ven <arjan at linux.intel.com>
To: powertop@lists.01.org
Subject: Re: [Powertop] how does powertop estimate the watt of laptop computers?
Date: Tue, 29 Mar 2016 10:58:03 -0700 [thread overview]
Message-ID: <56FAC22B.5020803@linux.intel.com> (raw)
In-Reply-To: tencent_611127A954D980684BF72795@qq.com
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On 3/28/2016 11:20 PM, haoyu Wang wrote:
> hi,powertop's developers .I am a student which recently studing power consumption of pc.I have known windows power monitor software
> Joulemeter. there are some papers introduce how it works . but i can't find the same documents that introduce the powertop.
>
> so i want to know the process of calculating the watts of those components .for example, how to calculate the cpu's power ? i have following questions :
> 1. does powertop use power model to calculate the power ?
> 2. does powertop use the utilization of cpu and combine some cpu's power model to calculate power ?
> 3.how to get those utilization ?use linux kernal function or directly read some data from cpu registers which likes intel power gadget ?
powertop builds a dynamic model of your system and tries to estimate the contribution to total system power based on that model and the current utilizations of each of the
components in the model, and tries to, over time, train that model based on more and more measurements that are taken (usually by the battery, but we also support some
external power meters)
next reply other threads:[~2016-03-29 17:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-29 17:58 Arjan van de Ven [this message]
-- strict thread matches above, loose matches on Subject: below --
2016-03-29 17:41 [Powertop] how does powertop estimate the watt of laptop computers? Kok, Auke-jan H
2016-03-29 6:20 haoyu Wang
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