From: Hin-Tak Leung <hintak.leung@gmail.com>
To: Florian Zumbiehl <florz@florz.de>
Cc: Andrea Merello <andreamrl@tiscali.it>,
Larry Finger <Larry.Finger@lwfinger.net>,
herton@mandriva.com.br, htl10@users.sourceforge.net,
linux-wireless@vger.kernel.org
Subject: Re: Power consumption of RTL8187 (driver)/recommendations for low-power USB 802.11 adapter?
Date: Sat, 19 Dec 2009 23:31:22 +0000 [thread overview]
Message-ID: <3ace41890912191531k8703ecfr19c33f30127b2ecb@mail.gmail.com> (raw)
In-Reply-To: <20091219184401.GH2512@florz.florz.dyndns.org>
On Sat, Dec 19, 2009 at 6:44 PM, Florian Zumbiehl <florz@florz.de> wrote:
> So, a base load of 3.8 W seems to be caused by any connected usb device
> preventing C3 and some 250 ms polling done by uhci_hcd, plus a bit for
> the device itself. According to
> http://www.mail-archive.com/linux-usb-users@lists.sourceforge.net/msg19354.html
> (why aren't there any message IDs on any of those archive sites, BTW?)
> that's the expected behaviour.
Presumably power-management changes have a time granuarity i.e. if you
make the CPU busy for one moment, it would stay in the higher-power
state for a while before dropping down? That's the standard thing to
do for prevent the power state being changed too often (and have bad
effects of some sort)?
next prev parent reply other threads:[~2009-12-19 23:31 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-18 18:02 Power consumption of RTL8187 (driver)/recommendations for low-power USB 802.11 adapter? Florian Zumbiehl
2009-12-18 18:20 ` Larry Finger
2009-12-18 18:59 ` Florian Zumbiehl
2009-12-18 23:28 ` Larry Finger
2009-12-19 0:15 ` Andrea Merello
2009-12-19 1:13 ` Florian Zumbiehl
2009-12-19 10:30 ` Andrea Merello
2009-12-19 15:32 ` Hin-Tak Leung
2009-12-19 18:44 ` Florian Zumbiehl
2009-12-19 23:31 ` Hin-Tak Leung [this message]
2009-12-21 21:27 ` Florian Zumbiehl
2009-12-20 18:43 ` Kalle Valo
2009-12-19 0:37 ` Florian Zumbiehl
2009-12-19 10:19 ` Andrea Merello
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