From: Arjan van de Ven <arjan at linux.intel.com>
To: powertop@lists.01.org
Subject: Re: [Powertop] USB devices get wrong power use values
Date: Sun, 13 Oct 2013 08:33:51 -0700 [thread overview]
Message-ID: <525ABD5F.6030001@linux.intel.com> (raw)
In-Reply-To: 20130922235400.GE1886@merlins.org
[-- Attachment #1: Type: text/plain, Size: 679 bytes --]
On 9/22/2013 4:54 PM, Marc MERLIN wrote:
> So, I asked on the linux-usb list, and one thing I quickly found out is that the
> Watt value given by powertop 2.4 is way off for USB devices:
what makes you think the value is off?
>> Power est. Events/s Category Description
>> 8.18 W 100.0% Device USB device: Yubico Yubikey II (Yubico)
>> 8.13 W 100.0% Device USB device: Integrated Camera (Chicony Electronics Co., Ltd.)
having a USB device active also generally makes the CPU/etc use much more power,
which Powertop "charges" to the USB device in question.
8 Watts sounds entirely reasonable for that to me...
next reply other threads:[~2013-10-13 15:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-13 15:33 Arjan van de Ven [this message]
-- strict thread matches above, loose matches on Subject: below --
2013-10-18 0:24 [Powertop] USB devices get wrong power use values Marc MERLIN
2013-10-18 0:01 Marc MERLIN
2013-10-13 22:38 Arjan van de Ven
2013-10-13 22:10 Marc MERLIN
2013-10-13 18:48 Arjan van de Ven
2013-10-13 16:22 Marc MERLIN
2013-10-12 11:16 Sergey Senozhatsky
2013-09-22 23:54 Marc MERLIN
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