From: Paul Menzel <pmenzel@molgen.mpg.de>
To: Realtek linux nic maintainers <nic_swsd@realtek.com>
Cc: "David S. Miller" <davem@davemloft.net>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Realtek NIC uses over 1 Watt with no traffic
Date: Tue, 20 Nov 2018 09:40:25 +0100 [thread overview]
Message-ID: <081beaeb-be22-55b3-2927-fec04e9f714a@molgen.mpg.de> (raw)
Dear Linux folks,
Using Ubuntu 18.10, Linux 4.18.0-11-generic, PowerTOP 2.9 shows, the NIC
uses 1.77 Watts. A network cable is plugged in, but there is no real
traffic according to `iftop`. Only an email program is running.
$ lspci -nn -s 3:00.1
03:00.1 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd.
RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168]
(rev 12)
Is that a measurement error, or does the NIC really need that much power?
> Der Akku meldet eine Entladungsrate von 10.2 W
> Der verbrauchte Strom ist: 0.00 J
> Grundsätzlich benötigte Energie wird auf 10.5 W geschätzt
>
> Energieschätz. Auslastung Gerätename
> 7.03 W 4,9% Display backlight
> 1.77 W 0,0 pkts/s Netzwerkschnittstelle: enp3s0f1(r8169)
Letting it run for a while, the value even grows to 3.5 Watts, but
closing and starting PowerTOP, it goes back to 1.7X Watts.
Kind regards,
Paul
next reply other threads:[~2018-11-20 8:41 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-20 8:40 Paul Menzel [this message]
2018-11-20 14:45 ` Realtek NIC uses over 1 Watt with no traffic Andrew Lunn
2018-11-20 20:14 ` Heiner Kallweit
2018-11-20 20:31 ` Paul Menzel
2018-11-20 21:06 ` Heiner Kallweit
2018-11-20 22:25 ` Paul Menzel
2018-11-20 22:29 ` Heiner Kallweit
2018-11-20 20:20 ` Paul Menzel
2018-11-20 20:37 ` Andrew Lunn
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=081beaeb-be22-55b3-2927-fec04e9f714a@molgen.mpg.de \
--to=pmenzel@molgen.mpg.de \
--cc=davem@davemloft.net \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=nic_swsd@realtek.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).